Initial tests and working concept

.gitignore

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+# Based on https://raw.githubusercontent.com/github/gitignore/main/Node.gitignore
+
+# Logs
+
+logs
+_.log
+npm-debug.log_
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+
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+
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+
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+
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+
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+# IntelliJ based IDEs
+.idea
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+# Finder (MacOS) folder config
+.DS_Store

README.md

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+# discov-selector
+
+## To Use
+
+WIP: npm package coming soon, hopefully, maybe... this is an early proof of concept
+
+## To install dependencies
+
+```bash
+bun install
+```
+
+## To test
+
+```bash
+bun test
+```

bunfig.toml

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+[test]
+preload = "./tests/helpers/happydom.ts"

index.ts

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+class Discov {
+  readonly rootElement: HTMLElement = document
+  baseElement: HTMLElement
+  query: string = ''
+
+  constructor (rootElement?: HTMLElement) {
+    if (rootElement !== undefined) this.rootElement = rootElement
+    this.baseElement = this.rootElement
+    this.query = ''
+  }
+
+  tag(tagName: string): HTMLElement {
+    this.query += ` ${tagName}`
+    return this
+  }
+
+  class(className: string): HTMLElement {
+    if (className.charAt(0) == '.') console.warn('class target contains a "." and may not match')
+    this.query += `.${className}`
+    return this
+  }
+
+  get element(): HTMLElement {
+    if (this.query == '') return this.baseElement
+    return this.baseElement.querySelector(this.query)
+  }
+}
+
+export default (rootElement?: HTMLElement) => new Discov(rootElement)

package.json

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+{
+  "name": "discov-selector",
+  "module": "index.ts",
+  "type": "module",
+  "devDependencies": {
+    "@happy-dom/global-registrator": "^12.10.3",
+    "bun-types": "latest"
+  },
+  "peerDependencies": {
+    "typescript": "^5.0.0"
+  }
+}

tests/all.test.ts

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+import { expect, test } from 'bun:test'
+import discov from '../index.ts'
+
+test('can select a simple passed in element', () => {
+  expect(
+    discov(document.body)
+    .element
+  ).toBe(document.body)
+})
+
+test('can target by tag', () => {
+  document.body.innerHTML = `<button>My button</button>`
+
+  let buttonElement = document.querySelector('button')
+  expect(
+    discov(document.body)
+    .tag('button')
+    .element
+  ).toBe(buttonElement)
+})
+
+test('can target by class', () => {
+  document.body.innerHTML = `<button class='my-class'>My button</button>`
+
+  let buttonElement = document.querySelector('button')
+  expect(
+    discov(document.body)
+    .class('my-class')
+    .element
+  ).toBe(buttonElement)
+})
+
+test('can target by tag with class', () => {
+  document.body.innerHTML = `<button class='my-class'>My button</button>`
+
+  let buttonElement = document.querySelector('button')
+  expect(
+    discov(document.body)
+    .tag('button')
+    .class('my-class')
+    .element
+  ).toBe(buttonElement)
+})

tests/helpers/happydom.ts

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+import { GlobalRegistrator } from "@happy-dom/global-registrator"
+
+GlobalRegistrator.register()

tsconfig.json

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+{
+  "compilerOptions": {
+    "lib": ["ESNext", "dom"],
+    "module": "esnext",
+    "target": "esnext",
+    "moduleResolution": "bundler",
+    "moduleDetection": "force",
+    "allowImportingTsExtensions": true,
+    "noEmit": true,
+    "composite": true,
+    "strict": true,
+    "downlevelIteration": true,
+    "skipLibCheck": true,
+    "jsx": "react-jsx",
+    "allowSyntheticDefaultImports": true,
+    "forceConsistentCasingInFileNames": true,
+    "allowJs": true,
+    "types": [
+      "bun-types" // add Bun global
+    ]
+  }
+}