问题描述
在这种情况下:用户选择一些文本。我想修改选择,以将完整的文本包含在边界AnchorNode和FocusNode中,而不考虑用户在哪里开始和停止选择。
<script>
document.onselectionchange =(e)=>{
let sel=document.getSelection();
// Here I want to expand the selection to include all the text in the selection. For example
// if "AA CC" is selected in the html below,I want to expand it to "AAAA BBBB CCCC"
}
</script>
<span id="container" contenteditable="true">
<span id="span1">AAAA </span><span id="span2">BBBB </span><span id="span3">CCCC </span><span id="span4">dddd</span>
</span>
这可能吗?任何指导将不胜感激。
解决方法
好的,我在这里看到了另一篇文章,这使我明白了秘密在于创建范围对象这一事实。这给了我我想要的东西:
function onMouseUp(e) {
let sel = document.getSelection();
if (sel && sel.anchorNode && sel.anchorNode != document & sel.toString() != "") {
let a = sel.anchorNode;
let f = sel.focusNode;
let r = document.createRange();
r.setStartBefore(a);
r.setEndAfter(f);
sel.removeAllRanges();
sel.addRange(r);
console.log(sel.toString());
}
}
window.addEventListener("mouseup",onMouseUp);