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z.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
p:empty::before {
content: "\ffff";
}
.hidden {
display: none;
}
</style>
</head>
<body>
<div contenteditable="true">
<p></p>
</div>
<script>
const editor = document.querySelector("div");
editor.addEventListener("beforeinput", (e) => {
const staticRange = e.getTargetRanges()[0];
});
// const p = window.document.querySelector(".p");
// window.document.addEventListener("selectionchange", () => {
// const selection = window.document.getSelection();
// const hiddenList = p.querySelectorAll("span");
// if (p.contains(selection.anchorNode) || p.contains(selection.focusNode)) {
// hiddenList.forEach((el) => el.classList.remove("hidden"));
// } else {
// hiddenList.forEach((el) => el.classList.add("hidden"));
// }
// });
const observer = new MutationObserver((mutations) => {
console.log(mutations);
});
observer.observe(editor, {
childList: true,
characterData: true,
subtree: true,
attributes: true,
characterDataOldValue: true,
});
</script>
</body>
</html>