update to v2.3.0

add `.rep()` & `.replaceChildren()` function
update `.app()` & `.append()` to support rest params
update build target to ES6
fix comment color on demo page
add (more) tests

dist/demo.html

@@ -148,6 +148,10 @@
                     /\`[^`]+\`/g,
                     (val) => `<span class="code-str">${val}</span>`,
                 )
+                .replace(
+                    /\/\/.*/g,
+                    (val) => `<span class="code-cmnt">${val}</span>`,
+                )
                 .replace(/\.\w+/g, (val) =>
                     val !== ".js"
                         ? `<span class="code-func">${val}</span>`

dist/fluent-dom-esm.js

@@ -4,22 +4,22 @@ const isHTMLElement = (value) => !!value.nodeType;
 const isNumber = (value) => typeof value === "number";
 const isString = (value) => typeof value === "string";
 /**
- * fluent-dom-esm v2.2.1
+ * fluent-dom-esm v2.3.0
  *
- * Fluent DOM Manipulation, adapted to ESM and cranked up to v2.2(.1).
+ * Fluent DOM Manipulation, adapted to ESM and cranked up to v2.3(.0).
  *
  * https://git.itsericwoodward.com/eric/fluent-dom-esm
  *
- * v2.2.1 Copyright (c) 2025 Eric Woodward
+ * v2.3.0 Copyright (c) 2025 Eric Woodward
  * Original copyright (c) 2009 Tommy Montgomery (https://glacius.tmont.com/articles/fluent-dom-manipulation-in-javascript)
  *
  * Released under the WTFPL (Do What the Fuck You Want to Public License)
  *
- * @author	Eric Woodward (v2 update)
+ * @author	Eric Woodward (v2+)
  * @author  Tommy Montgomery (original)
  * @license http://sam.zoy.org/wtfpl/
  */
-const APP_VERSION = "2.2.1";
+const APP_VERSION = "2.3.0";
 const fluentDomEsm = (function() {
   const FluentDom = function(nodeOrQuerySelector) {
     if (typeof nodeOrQuerySelector !== "string")
@@ -40,35 +40,43 @@ const fluentDomEsm = (function() {
     let root = node || null;
     this.fluentDom = APP_VERSION;
     this.a = this.attr = function(name, value) {
-      if (!root || typeof name === "undefined" || typeof value === "undefined") {
+      if (!root) {
         throw new Error("Cannot set an attribute on a non-element");
       }
+      if (typeof name === "undefined") {
+        throw new Error("Cannot set an attribute without a name");
+      }
       root.setAttribute(name, value);
       return this;
     };
-    this.app = this.append = function(value) {
+    this.app = this.append = function(...content) {
       if (!root || !root?.appendChild) {
         throw new Error("Cannot append to a non-element");
       }
+      if (!content || content.length < 1) {
+        throw new Error("Cannot append without a value");
+      }
+      content.forEach((value) => {
         const type = typeof value;
         if (type === "object") {
           if (isFluentDomObject(value)) {
             const domVal = value.toDom();
-          if (domVal !== null) root.appendChild(domVal);
+            if (domVal !== null) root?.appendChild(domVal);
           } else if (isHTMLElement(value)) {
-          root.appendChild(value);
+            root?.appendChild(value);
           } else {
             throw new Error(
               "Invalid argument: not an HTMLElement or FluentDom object"
             );
           }
         } else if (isNumber(value) || isString(value)) {
-        root.appendChild(document.createTextNode(`${value}`));
+          root?.appendChild(document.createTextNode(`${value}`));
         } else {
           throw new Error(
             `Invalid argument: not a valid type (${typeof value})`
           );
         }
+      });
       return this;
     };
     this.c = this.create = function(tagName) {
@@ -87,9 +95,7 @@ const fluentDomEsm = (function() {
     };
     this.html = function(content) {
       if (!root) {
-        throw new Error(
+        throw new Error("Cannot set innerHTML for a non-element");
-          "Cannot get or set innerHTML for a non-element"
-        );
       }
       root.innerHTML = content;
       return this;
@@ -108,6 +114,25 @@ const fluentDomEsm = (function() {
       root = document.querySelector(selector);
       return this;
     };
+    this.rep = this.replaceChildren = function(...content) {
+      if (!root) {
+        throw new Error("Cannot replaceChildren on a non-element");
+      }
+      if (!root.replaceChildren) {
+        if (!content) return this.html("");
+        return this.html("").append(...content);
+      }
+      if (content.length && content[0] && isFluentDomObject(content[0])) {
+        const domValues = content.map(
+          (val) => val.toDom()
+        );
+        root.replaceChildren(
+          ...domValues.filter((val) => val !== null)
+        );
+      }
+      root.replaceChildren(...content);
+      return this;
+    };
     function styleFunction(prop, value) {
       if (!root) {
         throw new Error("Cannot get or set style for a non-element");
@@ -150,7 +175,7 @@ const fluentDomEsm = (function() {
       return this;
     };
     this.v = this.version = function() {
-      return APP_VERSION;
+      return this.fluentDom;
     };
   };
   return FluentDom;

dist/fluent-dom-esm.types.d.ts

@@ -1,9 +1,9 @@
 export interface FluentDomObject {
-    (nodeOrQuerySelector: string | HTMLElement): FluentDomObject;
+    (nodeOrQuerySelector: HTMLElement | string): FluentDomObject;
     fluentDom: string;
     a: (name: string, value: string) => FluentDomObject;
-    app: (obj: FluentDomObject | HTMLElement | string) => FluentDomObject;
+    app: (...content: (FluentDomObject | HTMLElement | string)[]) => FluentDomObject;
-    append: (obj: FluentDomObject | HTMLElement | string) => FluentDomObject;
+    append: (...content: (FluentDomObject | HTMLElement | string)[]) => FluentDomObject;
     attr: (name: string, value: string) => FluentDomObject;
     c: (tagName: string) => FluentDomObject;
     className: (className: string) => FluentDomObject;
@@ -19,6 +19,8 @@ export interface FluentDomObject {
     listen: (type: keyof HTMLElementEventMap, listener: () => {}, optionsOrUseCapture?: boolean | object) => FluentDomObject;
     q: (selector: string) => FluentDomObject;
     querySelector: (selector: string) => FluentDomObject;
+    rep: (...content: (FluentDomObject | HTMLElement | string)[]) => FluentDomObject;
+    replaceChildren: (...content: (FluentDomObject | HTMLElement | string)[]) => FluentDomObject;
     s: ((prop: CSSStyleDeclaration) => FluentDomObject) | ((prop: string, value: string) => FluentDomObject);
     style: ((prop: CSSStyleDeclaration) => FluentDomObject) | ((prop: string, value: string) => FluentDomObject);
     t: (text: string) => FluentDomObject;

jsr.json

@@ -1,5 +1,5 @@
 {
   "name": "@itsericwoodward/fluent-dom-esm",
-  "version": "2.2.1",
+  "version": "2.3.0",
   "exports": "./src/fluent-dom-esm.ts"
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "fluent-dom-esm",
-  "version": "2.2.1",
+  "version": "2.3.0",
   "description": "",
   "license": "WTFPL",
   "exports": {

public/demo.html

@@ -148,6 +148,10 @@
                     /\`[^`]+\`/g,
                     (val) => `<span class="code-str">${val}</span>`,
                 )
+                .replace(
+                    /\/\/.*/g,
+                    (val) => `<span class="code-cmnt">${val}</span>`,
+                )
                 .replace(/\.\w+/g, (val) =>
                     val !== ".js"
                         ? `<span class="code-func">${val}</span>`

src/__tests__/fluent-dom-esm.append.test.ts

@@ -0,0 +1,219 @@
+// @vitest-environment happy-dom
+
+import { beforeEach, describe, expect, it } from "vitest";
+
+import $d from "../fluent-dom-esm";
+
+describe(".app() and .append()", () => {
+    beforeEach(() => {
+        document.body.replaceChildren();
+    });
+
+    it("should support single FluentDomObject argument", () => {
+        // default state
+        const body = $d(document.body).toDom();
+        expect(body).not.toBeNull();
+        expect(body).toBeEmptyDOMElement();
+
+        // add child
+        $d(document.body).app($d.c("div").id("item1").t("Item 1"));
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body?.children.length).toEqual(1);
+        expect(body?.children[0]).toHaveAttribute("id", "item1");
+
+        // add child
+        $d(document.body).app($d.c("div").id("item2").t("Item 2"));
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 2");
+        expect(body?.children.length).toEqual(2);
+        expect(body?.children[1]).toHaveAttribute("id", "item2");
+
+        // reset
+        body?.replaceChildren();
+
+        // add child
+        $d(document.body).append($d.c("div").id("item1").t("Item 1"));
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body?.children.length).toEqual(1);
+        expect(body?.children[0]).toHaveAttribute("id", "item1");
+
+        // add child
+        $d(document.body).append($d.c("div").id("item2").t("Item 2"));
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 2");
+        expect(body?.children.length).toEqual(2);
+        expect(body?.children[1]).toHaveAttribute("id", "item2");
+    });
+
+    it("should support multiple FluentDomObject arguments for `.app()` and `.append()`", () => {
+        // default state
+        const body = $d(document.body).toDom();
+        expect(body).not.toBeNull();
+        expect(body).toBeEmptyDOMElement();
+
+        // add children
+        $d(document.body).app(
+            $d.c("div").id("item1").t("Item 1"),
+            $d.c("div").id("item2").t("Item 2"),
+        );
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body).toHaveTextContent("Item 2");
+        expect(body?.children.length).toEqual(2);
+        expect(body?.children[0]).toHaveAttribute("id", "item1");
+        expect(body?.children[1]).toHaveAttribute("id", "item2");
+
+        // reset
+        body?.replaceChildren();
+
+        // add children
+        $d(document.body).append(
+            $d.c("div").id("item1").t("Item 1"),
+            $d.c("div").id("item2").t("Item 2"),
+        );
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body).toHaveTextContent("Item 2");
+        expect(body?.children.length).toEqual(2);
+        expect(body?.children[0]).toHaveAttribute("id", "item1");
+        expect(body?.children[1]).toHaveAttribute("id", "item2");
+    });
+
+    it("should support single HTMLElement argument for `.app()` and `.append()`", () => {
+        // default state
+        const body = $d(document.body).toDom();
+        expect(body).not.toBeNull();
+        expect(body).toBeEmptyDOMElement();
+
+        // add child
+        $d(document.body).app(
+            $d.c("div").id("item1").t("Item 1").toDom() ?? "",
+        );
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body?.children.length).toEqual(1);
+        expect(body?.children[0]).toHaveAttribute("id", "item1");
+
+        // add child
+        $d(document.body).app(
+            $d.c("div").id("item2").t("Item 2").toDom() ?? "",
+        );
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 2");
+        expect(body?.children.length).toEqual(2);
+        expect(body?.children[1]).toHaveAttribute("id", "item2");
+
+        // reset
+        body?.replaceChildren();
+
+        // add child
+        $d(document.body).append(
+            $d.c("div").id("item1").t("Item 1").toDom() ?? "",
+        );
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body?.children.length).toEqual(1);
+        expect(body?.children[0]).toHaveAttribute("id", "item1");
+
+        // add child
+        $d(document.body).append(
+            $d.c("div").id("item2").t("Item 2").toDom() ?? "",
+        );
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 2");
+        expect(body?.children.length).toEqual(2);
+        expect(body?.children[1]).toHaveAttribute("id", "item2");
+    });
+
+    it("should support multiple HTMLElement arguments for `.app()` and `.append()`", () => {
+        // default state
+        const body = $d(document.body).toDom();
+        expect(body).not.toBeNull();
+        expect(body).toBeEmptyDOMElement();
+
+        // add children
+        $d(document.body).app(
+            $d.c("div").id("item1").t("Item 1").toDom() ?? "",
+            $d.c("div").id("item2").t("Item 2").toDom() ?? "",
+        );
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body).toHaveTextContent("Item 2");
+        expect(body?.children.length).toEqual(2);
+        expect(body?.children[0]).toHaveAttribute("id", "item1");
+        expect(body?.children[1]).toHaveAttribute("id", "item2");
+        // reset
+        body?.replaceChildren();
+
+        // add child
+        $d(document.body).append(
+            $d.c("div").id("item1").t("Item 1").toDom() ?? "",
+            $d.c("div").id("item2").t("Item 2").toDom() ?? "",
+        );
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body).toHaveTextContent("Item 2");
+        expect(body?.children.length).toEqual(2);
+        expect(body?.children[0]).toHaveAttribute("id", "item1");
+        expect(body?.children[1]).toHaveAttribute("id", "item2");
+    });
+
+    it("should support single string argument for `.app()` and `.append()`", () => {
+        // default state
+        const body = $d(document.body).toDom();
+        expect(body).not.toBeNull();
+        expect(body).toBeEmptyDOMElement();
+
+        // add child
+        $d(document.body).append("Item 1");
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body?.children.length).toEqual(0);
+
+        // add child
+        $d(document.body).app("Item 2");
+        expect(body).toHaveTextContent("Item 2");
+        expect(body?.children.length).toEqual(0);
+
+        // reset
+        body?.replaceChildren();
+
+        // add child
+        $d(document.body).append("Item 1");
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body?.children.length).toEqual(0);
+
+        // add child
+        $d(document.body).app("Item 2");
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 2");
+        expect(body?.children.length).toEqual(0);
+    });
+
+    it("should support multiple string arguments for `.app()` and `.append()`", () => {
+        // default state
+        const body = $d(document.body).toDom();
+        expect(body).not.toBeNull();
+        expect(body).toBeEmptyDOMElement();
+
+        // add children
+        $d(document.body).append("Item 1", "Item 2");
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body).toHaveTextContent("Item 2");
+        expect(body?.children.length).toEqual(0);
+
+        // reset
+        body?.replaceChildren();
+
+        // add child
+        $d(document.body).append("Item 1", "Item 2");
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body).toHaveTextContent("Item 2");
+        expect(body?.children.length).toEqual(0);
+    });
+});

src/__tests__/fluent-dom-esm.attr.test.ts

@@ -0,0 +1,67 @@
+// @vitest-environment happy-dom
+
+import { describe, expect, it } from "vitest";
+
+import $d from "../fluent-dom-esm";
+
+describe(".a() and .attr()", () => {
+    it("adds an attribute to the wrapped HTMLElement", () => {
+        // create base anchor
+        const $a1 = $d.c("a");
+        expect($a1.toDom()).not.toBeNull();
+        expect($a1.toDom()).toBeEmptyDOMElement();
+        expect($a1.toDom()?.outerHTML).toEqual("<a></a>");
+        expect($a1.toDom()?.getAttribute("href")).toBeNull();
+
+        // add href attribute
+        $a1.a("href", "http://example.com");
+        expect($a1.toDom()?.getAttribute("href")).not.toBeNull();
+        expect($a1.toDom()?.getAttribute("href")).toEqual("http://example.com");
+
+        // create base anchor
+        const $a2 = $d.c("a");
+        expect($a2.toDom()).not.toBeNull();
+        expect($a2.toDom()).toBeEmptyDOMElement();
+        expect($a2.toDom()?.outerHTML).toEqual("<a></a>");
+        expect($a2.toDom()?.getAttribute("href")).toBeNull();
+
+        // add href attribute
+        $a2.attr("href", "mailto:someone@somewhere.com");
+        expect($a2.toDom()?.getAttribute("href")).not.toBeNull();
+        expect($a2.toDom()?.getAttribute("href")).toEqual(
+            "mailto:someone@somewhere.com",
+        );
+    });
+
+    it("disables a form element when the 'disabled' attribute is set", () => {
+        const $button1 = $d.c("button").t("click me");
+        expect($button1.toDom()).not.toBeNull();
+        expect($button1.toDom()).not.toBeDisabled();
+        $button1.a("disabled", "");
+        expect($button1.toDom()).toBeDisabled();
+        $button1.a("name", "button1");
+        expect($button1.toDom()?.getAttribute("name")).toEqual("button1");
+
+        const $button2 = $d.c("button").t("click me");
+        expect($button2.toDom()).not.toBeNull();
+        expect($button2.toDom()).not.toBeDisabled();
+        $button2.attr("disabled", "");
+        expect($button2.toDom()).toBeDisabled();
+        $button1.attr("name", "button2");
+        expect($button1.toDom()?.getAttribute("name")).toEqual("button2");
+    });
+
+    it("updates the HTMLElements dataset when a data attribute is set", () => {
+        const $div1 = $d.c("div");
+        expect($div1.toDom()).not.toBeNull();
+        expect($div1.toDom()?.dataset).toEqual({});
+        $div1.a("data-test", "some data");
+        expect($div1.toDom()?.dataset).toEqual({ test: "some data" });
+
+        const $div2 = $d.c("div");
+        expect($div2.toDom()).not.toBeNull();
+        expect($div2.toDom()?.dataset).toEqual({});
+        $div2.a("data-test", "some more data");
+        expect($div2.toDom()?.dataset).toEqual({ test: "some more data" });
+    });
+});

src/__tests__/fluent-dom-esm.create.test.ts

@@ -0,0 +1,50 @@
+// @vitest-environment happy-dom
+
+import { describe, expect, it } from "vitest";
+
+import $d from "../fluent-dom-esm";
+
+describe(".c() and .create()", () => {
+    it("should create an FluentDomObject-wrapped HTMLElement", () => {
+        const $div1 = $d(document.body).c("div");
+        expect($div1.toDom()).not.toBeNull();
+        expect($div1.toDom()).toBeEmptyDOMElement();
+        expect($div1.toDom()?.outerHTML).toEqual("<div></div>");
+        expect($div1.fluentDom).toBeDefined();
+        expect($div1.fluentDom).toEqual($div1.version());
+
+        const $span1 = $d(document.body).c("span");
+        expect($span1.toDom()).not.toBeNull();
+        expect($span1.toDom()).toBeEmptyDOMElement();
+        expect($span1.toDom()?.outerHTML).toEqual("<span></span>");
+        expect($span1.fluentDom).toBeDefined();
+        expect($span1.fluentDom).toEqual($span1.version());
+
+        const $div2 = $d(document.body).create("div");
+        expect($div2.toDom()).not.toBeNull();
+        expect($div2.toDom()).toBeEmptyDOMElement();
+        expect($div2.toDom()?.outerHTML).toEqual("<div></div>");
+        expect($div2.fluentDom).toBeDefined();
+        expect($div2.fluentDom).toEqual($div2.version());
+
+        const $span2 = $d(document.body).create("span");
+        expect($span2.toDom()).not.toBeNull();
+        expect($span2.toDom()).toBeEmptyDOMElement();
+        expect($span2.toDom()?.outerHTML).toEqual("<span></span>");
+        expect($span2.fluentDom).toBeDefined();
+        expect($span2.fluentDom).toEqual($span2.version());
+    });
+
+    it("should replace the current object with a new object", () => {
+        // default state
+        let $el = $d(document.body);
+        expect($el.toDom()).not.toBeNull();
+        expect($el.toDom()).toBeEmptyDOMElement();
+        expect($el.toDom()?.outerHTML).toEqual("<body></body>");
+
+        $el = $el.c("ul");
+        expect($el.toDom()).not.toBeNull();
+        expect($el.toDom()).toBeEmptyDOMElement();
+        expect($el.toDom()?.outerHTML).toEqual("<ul></ul>");
+    });
+});

src/__tests__/fluent-dom-esm.object.test.ts

@@ -0,0 +1,67 @@
+// @vitest-environment happy-dom
+
+import { beforeEach, describe, expect, it } from "vitest";
+
+import $d from "../fluent-dom-esm";
+
+describe("base object", () => {
+    beforeEach(() => {
+        document.body.replaceChildren();
+    });
+
+    it("should allow for wrapping an existing node", () => {
+        const $body = $d(document.body);
+        $d(document.body).app($d.c("div").cls("test-class").t("text content"));
+        expect($body.toDom()?.innerHTML).toEqual(
+            '<div class="test-class">text content</div>',
+        );
+        expect(document.body?.innerHTML).toEqual(
+            '<div class="test-class">text content</div>',
+        );
+    });
+
+    it("should allow for wrapping an existing node via a querySelector for an ID", () => {
+        $d(document.body)
+            .app($d.c("div").id("item1").t("Item 1"))
+            .app($d.c("div").id("item2").t("Item 2"))
+            .app($d.c("div").id("item3").cls("item-num3").t("Item 3"));
+        expect($d("#item2").toDom()).toHaveTextContent("Item 2");
+        expect($d("#item3").toDom()).toHaveClass("item-num3");
+    });
+
+    it("should create an FluentDomObject-wrapped HTMLElement via .c() and .create()", () => {
+        const $div1 = $d.c("div");
+        expect($div1.toDom()).not.toBeNull();
+        expect($div1.toDom()).toBeEmptyDOMElement();
+        expect($div1.toDom()?.outerHTML).toEqual("<div></div>");
+        expect($div1.fluentDom).toBeDefined();
+        expect($div1.fluentDom).toEqual($div1.version());
+
+        const $span1 = $d.c("span");
+        expect($span1.toDom()).not.toBeNull();
+        expect($span1.toDom()).toBeEmptyDOMElement();
+        expect($span1.toDom()?.outerHTML).toEqual("<span></span>");
+        expect($span1.fluentDom).toBeDefined();
+        expect($span1.fluentDom).toEqual($span1.version());
+
+        const $div2 = $d.create("div");
+        expect($div2.toDom()).not.toBeNull();
+        expect($div2.toDom()).toBeEmptyDOMElement();
+        expect($div2.toDom()?.outerHTML).toEqual("<div></div>");
+        expect($div2.fluentDom).toBeDefined();
+        expect($div2.fluentDom).toEqual($div2.version());
+
+        const $span2 = $d.create("span");
+        expect($span2.toDom()).not.toBeNull();
+        expect($span2.toDom()).toBeEmptyDOMElement();
+        expect($span2.toDom()?.outerHTML).toEqual("<span></span>");
+        expect($span2.fluentDom).toBeDefined();
+        expect($span2.fluentDom).toEqual($span2.version());
+    });
+
+    it("should return the FluentDomObject version via .v() and .version()", () => {
+        const $div = $d.c("div");
+        expect($d.v()).toEqual($div.fluentDom);
+        expect($d.version()).toEqual($div.fluentDom);
+    });
+});

src/__tests__/fluent-dom-esm.replaceChildren.test.ts

@@ -0,0 +1,135 @@
+// @vitest-environment happy-dom
+
+import { beforeEach, describe, expect, it } from "vitest";
+
+import $d from "../fluent-dom-esm";
+
+describe("fluent-dom-esm tests", () => {
+    beforeEach(() => {
+        document.body.replaceChildren();
+    });
+
+    it("should support no arguments for `.rep()` and `.replaceChildren()`", () => {
+        $d(document.body).app($d.c("div").id("item1").t("Item 1"));
+        expect($d(document.body).rep().toDom()).toBeEmptyDOMElement();
+
+        $d(document.body).app($d.c("div").id("item1").t("Item 1"));
+        expect(
+            $d(document.body).replaceChildren().toDom(),
+        ).toBeEmptyDOMElement();
+    });
+
+    it("should support an empty array for `.rep()` and `.replaceChildren()`", () => {
+        $d(document.body).app($d.c("div").id("item1").t("Item 1"));
+        expect(
+            $d(document.body)
+                .rep(...[])
+                .toDom(),
+        ).toBeEmptyDOMElement();
+
+        $d(document.body).app($d.c("div").id("item1").t("Item 1"));
+        expect(
+            $d(document.body)
+                .replaceChildren(...[])
+                .toDom(),
+        ).toBeEmptyDOMElement();
+    });
+
+    it("should support HTMLElement arguments for `.rep()` and `.replaceChildren()`", () => {
+        const newChild1 =
+            $d.c("div").id("new-child1").t("New Child 1").toDom() ?? "";
+        const newChild2 =
+            $d.c("div").id("new-child2").t("New Child 2").toDom() ?? "";
+
+        // default state
+        const body = $d(document.body).toDom();
+        expect(body).not.toBeNull();
+        expect(body).toBeEmptyDOMElement();
+
+        // add child
+        $d(document.body).app($d.c("div").id("item1").t("Item 1"));
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body?.children.length).toEqual(1);
+        expect(body?.children[0]).toHaveAttribute("id", "item1");
+
+        // replace with one child
+        $d(document.body).rep(newChild1);
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).not.toHaveTextContent("Item 1");
+        expect(body).toHaveTextContent("New Child 1");
+        expect(body?.children.length).toEqual(1);
+        expect(body?.children[0]).toHaveAttribute("id", "new-child1");
+
+        // replace with two children
+        $d(document.body).rep(newChild1, newChild2);
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body?.children.length).toEqual(2);
+        expect(body?.children[0]).toHaveAttribute("id", "new-child1");
+        expect(body?.children[0]).toHaveAttribute("id", "new-child1");
+        expect(body).toHaveTextContent("New Child 1");
+        expect(body).toHaveTextContent("New Child 2");
+
+        // replace with one child
+        $d(document.body).replaceChildren(newChild1);
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).not.toHaveTextContent("Item 1");
+        expect(body).toHaveTextContent("New Child 1");
+        expect(body?.children.length).toEqual(1);
+        expect(body?.children[0]).toHaveAttribute("id", "new-child1");
+
+        // replace with two children
+        $d(document.body).replaceChildren(newChild1, newChild2);
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body?.children.length).toEqual(2);
+        expect(body?.children[0]).toHaveAttribute("id", "new-child1");
+        expect(body?.children[0]).toHaveAttribute("id", "new-child1");
+        expect(body).toHaveTextContent("New Child 1");
+        expect(body).toHaveTextContent("New Child 2");
+    });
+
+    it("should support string arguments for `.rep()` and `.replaceChildren()`", () => {
+        const newChild1 = "New Child 1";
+        const newChild2 = "New Child 2";
+
+        // default state
+        const body = $d(document.body).toDom();
+        expect(body).not.toBeNull();
+        expect(body).toBeEmptyDOMElement();
+
+        // add child
+        $d(document.body).app($d.c("div").id("item1").t("Item 1"));
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).toHaveTextContent("Item 1");
+        expect(body?.children.length).toEqual(1);
+        expect(body?.children[0]).toHaveAttribute("id", "item1");
+
+        // replace with one child
+        $d(document.body).rep(newChild1);
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).not.toHaveTextContent("Item 1");
+        expect(body).toHaveTextContent("New Child 1");
+        expect(body?.children.length).toEqual(0);
+
+        // replace with two children
+        $d(document.body).rep(newChild1, newChild2);
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body?.children.length).toEqual(0);
+        expect(body).toHaveTextContent("New Child 1");
+        expect(body).toHaveTextContent("New Child 2");
+
+        // replace with one child
+        $d(document.body).replaceChildren(newChild1);
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body).not.toHaveTextContent("Item 1");
+        expect(body).toHaveTextContent("New Child 1");
+        expect(body?.children.length).toEqual(0);
+
+        // replace with two children
+        $d(document.body).replaceChildren(newChild1, newChild2);
+        expect(body).not.toBeEmptyDOMElement();
+        expect(body?.children.length).toEqual(0);
+        expect(body).toHaveTextContent("New Child 1");
+        expect(body).toHaveTextContent("New Child 2");
+    });
+});

src/__tests__/fluent-dom-esm.test.ts

@@ -5,28 +5,43 @@ import { describe, expect, it } from "vitest";
 import $d from "../fluent-dom-esm";
 
 describe("fluent-dom-esm tests", () => {
-    it("should allow for wrapping an existing node", () => {
+    it("should update an anchor's href via .h() and .href()", () => {
-        const $body = $d(document.body);
+        // create base anchor
-        $d(document.body).app($d.c("div").cls("test-class").t("text content"));
+        const $a1 = $d.c("a");
-        expect($body.toDom()?.innerHTML).toEqual(
+        expect($a1.toDom()).not.toBeNull();
-            '<div class="test-class">text content</div>',
+        expect($a1.toDom()).toBeEmptyDOMElement();
-        );
+        expect($a1.toDom()?.outerHTML).toEqual("<a></a>");
-        expect(document.body?.innerHTML).toEqual(
+        expect($a1.toDom()?.getAttribute("href")).toBeNull();
-            '<div class="test-class">text content</div>',
+
+        // add href attribute
+        $a1.h("http://example.com");
+        expect($a1.toDom()?.getAttribute("href")).not.toBeNull();
+        expect($a1.toDom()?.getAttribute("href")).toEqual("http://example.com");
+
+        // create base anchor
+        const $a2 = $d.c("a");
+        expect($a2.toDom()).not.toBeNull();
+        expect($a2.toDom()).toBeEmptyDOMElement();
+        expect($a2.toDom()?.outerHTML).toEqual("<a></a>");
+        expect($a2.toDom()?.getAttribute("href")).toBeNull();
+
+        // add href attribute
+        $a2.href("mailto:someone@somewhere.com");
+        expect($a2.toDom()?.getAttribute("href")).not.toBeNull();
+        expect($a2.toDom()?.getAttribute("href")).toEqual(
+            "mailto:someone@somewhere.com",
         );
     });
 
-    it("should allow for wrapping an existing node via a querySelector for an ID", () => {
+    it("should append text provided via `.t()` and `.text()`", () => {
-        $d(document.body)
-            .app($d.c("div").id("item1").t("Item 1"))
-            .app($d.c("div").id("item2").t("Item 2"))
-            .app($d.c("div").id("item3").cls("item-num3").t("Item 3"));
-        expect($d("#item2").toDom()).toHaveTextContent("Item 2");
-        expect($d("#item3").toDom()).toHaveClass("item-num3");
-    });
-
-    it("should append text provided via `.text()`", () => {
         const testVal = "testing 123";
         expect($d.c("div").t(testVal).toDom()).toHaveTextContent(testVal);
+        expect($d.c("div").text(testVal).toDom()).toHaveTextContent(testVal);
+    });
+
+    it("should return the FluentDomObject version via .v() and .version()", () => {
+        const $div = $d.c("div");
+        expect($div.v()).toEqual($div.fluentDom);
+        expect($div.version()).toEqual($div.fluentDom);
     });
 });

src/fluent-dom-esm.ts

@@ -1,16 +1,16 @@
 /**
- * fluent-dom-esm v2.2.1
+ * fluent-dom-esm v2.3.0
  *
- * Fluent DOM Manipulation, adapted to ESM and cranked up to v2.2(.1).
+ * Fluent DOM Manipulation, adapted to ESM and cranked up to v2.3(.0).
  *
  * https://git.itsericwoodward.com/eric/fluent-dom-esm
  *
- * v2.2.1 Copyright (c) 2025 Eric Woodward
+ * v2.3.0 Copyright (c) 2025 Eric Woodward
  * Original copyright (c) 2009 Tommy Montgomery (https://glacius.tmont.com/articles/fluent-dom-manipulation-in-javascript)
  *
  * Released under the WTFPL (Do What the Fuck You Want to Public License)
  *
- * @author	Eric Woodward (v2 update)
+ * @author	Eric Woodward (v2+)
  * @author  Tommy Montgomery (original)
  * @license http://sam.zoy.org/wtfpl/
  */
@@ -24,7 +24,7 @@ import {
     isString,
 } from "./fluent-dom-esm.type-guards";
 
-const APP_VERSION = "2.2.1";
+const APP_VERSION = "2.3.0";
 
 /**
  * IIFE that creates the FluentDomObject as default export
@@ -33,7 +33,7 @@ export default (function () {
     /**
      * Wraps provided element in a FluentDomObject which is then returned
      */
-    const FluentDom = function (nodeOrQuerySelector: string | HTMLElement) {
+    const FluentDom = function (nodeOrQuerySelector: HTMLElement | string) {
         if (typeof nodeOrQuerySelector !== "string")
             return new (FluentDomInternal as any)(nodeOrQuerySelector);
 
@@ -74,13 +74,12 @@ export default (function () {
          * Sets the named attribute on the wrapped HTMLElement
          */
         this.a = this.attr = function (name, value) {
-            if (
+            if (!root) {
-                !root ||
-                typeof name === "undefined" ||
-                typeof value === "undefined"
-            ) {
                 throw new Error("Cannot set an attribute on a non-element");
             }
+            if (typeof name === "undefined") {
+                throw new Error("Cannot set an attribute without a name");
+            }
 
             root.setAttribute(name, value);
             return this;
@@ -89,30 +88,36 @@ export default (function () {
         /**
          * Appends value to wrapped HTMLElement
          */
-        this.app = this.append = function (value) {
+        this.app = this.append = function (...content) {
             if (!root || !root?.appendChild) {
                 throw new Error("Cannot append to a non-element");
             }
 
+            if (!content || content.length < 1) {
+                throw new Error("Cannot append without a value");
+            }
+
+            content.forEach((value) => {
                 const type = typeof value;
                 if (type === "object") {
                     if (isFluentDomObject(value)) {
                         const domVal = value.toDom();
-                    if (domVal !== null) root.appendChild(domVal);
+                        if (domVal !== null) root?.appendChild(domVal);
                     } else if (isHTMLElement(value)) {
-                    root.appendChild(value);
+                        root?.appendChild(value);
                     } else {
                         throw new Error(
                             "Invalid argument: not an HTMLElement or FluentDom object",
                         );
                     }
                 } else if (isNumber(value) || isString(value)) {
-                root.appendChild(document.createTextNode(`${value}`));
+                    root?.appendChild(document.createTextNode(`${value}`));
                 } else {
                     throw new Error(
                         `Invalid argument: not a valid type (${typeof value})`,
                     );
                 }
+            });
 
             return this;
         };
@@ -150,11 +155,9 @@ export default (function () {
         /**
          * Sets the wrapped HTMLElement's "innerHTML" property
          */
-        this.html = function (content: string) {
+        this.html = function (content) {
             if (!root) {
-                throw new Error(
+                throw new Error("Cannot set innerHTML for a non-element");
-                    "Cannot get or set innerHTML for a non-element",
-                );
             }
 
             root.innerHTML = content;
@@ -180,11 +183,43 @@ export default (function () {
             return this;
         };
 
-        this.q = this.querySelector = function (selector: string) {
+        /**
+         * Sets wrapped HTMLElement to matching querySelector
+         */
+        this.q = this.querySelector = function (selector) {
             root = document.querySelector(selector);
             return this;
         };
 
+        /**
+         * Replaces the children of the wrapped HTMLElement
+         */
+        this.rep = this.replaceChildren = function (...content) {
+            if (!root) {
+                throw new Error("Cannot replaceChildren on a non-element");
+            }
+
+            // fallback to using `this.html()` and `this.append()`
+            if (!root.replaceChildren) {
+                if (!content) return this.html("");
+
+                return this.html("").append(...content);
+            }
+
+            if (content.length && content[0] && isFluentDomObject(content[0])) {
+                const domValues = content.map((val) =>
+                    (val as FluentDomObject).toDom(),
+                );
+
+                root.replaceChildren(
+                    ...domValues.filter((val) => val !== null),
+                );
+            }
+
+            root.replaceChildren(...(content as (HTMLElement | string)[]));
+            return this;
+        };
+
         /**
          * Sets one or more style attributes on the wrapped HTMLElement
          */
@@ -272,7 +307,7 @@ export default (function () {
          * Returns library version
          */
         this.v = this.version = function () {
-            return APP_VERSION;
+            return this.fluentDom;
         };
     };
 

src/fluent-dom-esm.types.ts

@@ -1,10 +1,14 @@
 export interface FluentDomObject {
-    (nodeOrQuerySelector: string | HTMLElement): FluentDomObject;
+    (nodeOrQuerySelector: HTMLElement | string): FluentDomObject;
     fluentDom: string;
 
     a: (name: string, value: string) => FluentDomObject;
-    app: (obj: FluentDomObject | HTMLElement | string) => FluentDomObject;
+    app: (
-    append: (obj: FluentDomObject | HTMLElement | string) => FluentDomObject;
+        ...content: (FluentDomObject | HTMLElement | string)[]
+    ) => FluentDomObject;
+    append: (
+        ...content: (FluentDomObject | HTMLElement | string)[]
+    ) => FluentDomObject;
     attr: (name: string, value: string) => FluentDomObject;
 
     c: (tagName: string) => FluentDomObject;
@@ -34,6 +38,13 @@ export interface FluentDomObject {
     q: (selector: string) => FluentDomObject;
     querySelector: (selector: string) => FluentDomObject;
 
+    rep: (
+        ...content: (FluentDomObject | HTMLElement | string)[]
+    ) => FluentDomObject;
+    replaceChildren: (
+        ...content: (FluentDomObject | HTMLElement | string)[]
+    ) => FluentDomObject;
+
     s:
         | ((prop: CSSStyleDeclaration) => FluentDomObject)
         | ((prop: string, value: string) => FluentDomObject);

tsconfig.json

@@ -1,9 +1,9 @@
 {
   "compilerOptions": {
-    "target": "ES2022",
+    "target": "es6",
     "useDefineForClassFields": true,
-    "module": "ESNext",
+    "module": "es6",
-    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "lib": ["es6", "DOM", "DOM.Iterable"],
     "skipLibCheck": true,
 
     /* Bundler mode */

vite.config.js

@@ -6,14 +6,18 @@ import { defineConfig } from 'vite';
 const __dirname = dirname(fileURLToPath(import.meta.url));
 
 export default defineConfig({
-	plugins: [dts({exclude: ["./setupTests.ts", "**/*.test.ts"]})],
+	plugins: [dts({exclude: ["./vitest.setup.ts", "**/*.test.ts"]})],
 	build: {
 		lib: {
 			entry: resolve(__dirname, 'src/fluent-dom-esm.ts'),
 			name: 'fluent-dom-esm',
 			fileName: 'fluent-dom-esm',
-			formats: ['es']
+			formats: ['es'],
+			outDir: './dist'
 		},
 		minify: false
-	}
+	},
+	test: {
+		setupFiles: ["./vitest.setup.ts"]
+	},
 });

vitest.config.js

@@ -1,7 +0,0 @@
-import { defineConfig } from 'vite';
-
-export default defineConfig({
-  test: {
-    setupFiles: ["./setupTests.ts"],
-  },
-})

yarn.lock

@@ -809,14 +809,14 @@ __metadata:
   linkType: hard
 
 "debug@npm:4, debug@npm:^4.3.4, debug@npm:^4.4.0, debug@npm:^4.4.1":
-  version: 4.4.1
+  version: 4.4.3
-  resolution: "debug@npm:4.4.1"
+  resolution: "debug@npm:4.4.3"
   dependencies:
     ms: "npm:^2.1.3"
   peerDependenciesMeta:
     supports-color:
       optional: true
-  checksum: 10c0/d2b44bc1afd912b49bb7ebb0d50a860dc93a4dd7d946e8de94abc957bb63726b7dd5aa48c18c2386c379ec024c46692e15ed3ed97d481729f929201e671fcd55
+  checksum: 10c0/d79136ec6c83ecbefd0f6a5593da6a9c91ec4d7ddc4b54c883d6e71ec9accb5f67a1a5e96d00a328196b5b5c86d365e98d8a3a70856aaf16b4e7b1985e67f5a6
   languageName: node
   linkType: hard