在 contenteditable div 中选择范围

沃梦达教程前端问题

2022-01-01

Select range in contenteditable div(在 contenteditable div 中选择范围)

本文介绍了在 contenteditable div 中选择范围的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

I've got a contenteditable div and a few paragraphs in it.

Here's my code:

<!DOCTYPE HTML>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    </head>
    <body>
        <div id="main" contenteditable="true" 
             style="border:solid 1px black; width:300px; height:300px">
            <div>Hello world!</div>
            <div>
                <br>
            </div>
            <div>This is a paragraph</div>
        </div>
    </body>
</html>

Assuming, I want to make a range selection which will contain the string "world! This is"

How to do that?

解决方案

Once you've got hold of the text nodes containing the text you want highlighted, it's easy. How you get those depends on how generic you need this to be. As it is at the moment, before the user has edited it, the following will work:

var mainDiv = document.getElementById("main");
var startNode = mainDiv.firstChild.firstChild;
var endNode = mainDiv.childNodes[2].firstChild;

var range = document.createRange();
range.setStart(startNode, 6); // 6 is the offset of "world" within "Hello world"
range.setEnd(endNode, 7); // 7 is the length of "this is"
var sel = window.getSelection();
sel.removeAllRanges();
sel.addRange(range);

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本文标题为：在 contenteditable div 中选择范围