Precise DOM morphing
morphing
typescript
dom
Clean up files
-98
-54
test_debug.js
-54
test_debug.js
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import { morph } from "./src/morphlex.js"
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function dom(html) {
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const tmp = document.createElement("div")
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tmp.innerHTML = html.trim()
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return tmp.firstChild
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}
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const from = dom(`
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<ul>
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<li>Item 1</li>
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<li>Item 2</li>
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<li>Item 3</li>
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</ul>
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`)
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const to = dom(`
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<ul>
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<li>Item 2</li>
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<li>Item 3</li>
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</ul>
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`)
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console.log("From before:", from.outerHTML)
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console.log("To:", to.outerHTML)
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const observer = new MutationObserver((records) => {
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console.log("Mutations:", records.length)
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records.forEach((r, i) => {
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console.log(` ${i}: type=${r.type}`)
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if (r.type === "childList") {
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console.log(` added: ${r.addedNodes.length}, removed: ${r.removedNodes.length}`)
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r.removedNodes.forEach(n => console.log(` removed: ${n.nodeName} ${n.textContent?.trim()}`))
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}
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})
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})
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observer.observe(from, { childList: true, subtree: true })
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morph(from, to)
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const pending = observer.takeRecords()
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console.log("Pending mutations:", pending.length)
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pending.forEach((r, i) => {
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console.log(` ${i}: type=${r.type}`)
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if (r.type === "childList") {
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console.log(` added: ${r.addedNodes.length}, removed: ${r.removedNodes.length}`)
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r.removedNodes.forEach(n => console.log(` removed: ${n.nodeName} ${n.textContent?.trim()}`))
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}
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})
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observer.disconnect()
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console.log("From after:", from.outerHTML)
-39
test_trace.js
-39
test_trace.js
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import { morph } from "./src/morphlex.js"
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import { JSDOM } from "jsdom"
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const dom = new JSDOM()
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global.document = dom.window.document
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global.Element = dom.window.Element
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global.HTMLInputElement = dom.window.HTMLInputElement
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global.DOMParser = dom.window.DOMParser
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global.Node = dom.window.Node
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function domEl(html) {
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const tmp = document.createElement("div")
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tmp.innerHTML = html.trim()
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return tmp.firstChild
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}
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const a = domEl(`<div>
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<input type="text" value="wrong">
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<input type="checkbox" value="right">
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</div>`)
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const b = domEl(`<div>
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<input type="checkbox" value="new">
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</div>`)
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const textInput = a.children[0]
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const checkboxInput = a.children[1]
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console.log("Before morph:")
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console.log("textInput:", textInput.outerHTML)
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console.log("checkboxInput:", checkboxInput.outerHTML)
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morph(a, b)
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console.log("\nAfter morph:")
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console.log("a.children.length:", a.children.length)
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console.log("a.children[0]:", a.children[0].outerHTML)
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console.log("a.children[0] === textInput:", a.children[0] === textInput)
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console.log("a.children[0] === checkboxInput:", a.children[0] === checkboxInput)