Set caret position at a specific position in contenteditable div

问题

SEE BEFORE MARKING DUPLICATE/DOWNVOTING

1. The contenteditable div will not have child elements
2. I do not want to set the position at the end of the div
3. I do not want a cross-browser solution, only Chrome support required
4. Only vanilla JS, no libraries.

I have seen many many solutions. Many by Tim Down, and others. But none does work. I have seen window.getSelection, .addRange etc. but don't see how they apply here.

Here's a jsfiddle.

(Tried) Code:

var node = document.querySelector("div");
node.focus();
var caret = 10; // insert caret after the 10th character say
var range = document.createRange();
range.setStart(node, caret);
range.setEnd(node, caret);
var sel = window.getSelection();
sel.removeAllRanges();
sel.addRange(range);

回答1:

You need to position the caret within the text node inside your element, not the element itself. Assuming your HTML looks something like <div contenteditable="true">Some text</div>, using the firstChild property of the element will get the text node.

Updated jsFiddle:

http://jsfiddle.net/xgz6L/8/

Code:

var node = document.querySelector("div");
node.focus();
var textNode = node.firstChild;
var caret = 10; // insert caret after the 10th character say
var range = document.createRange();
range.setStart(textNode, caret);
range.setEnd(textNode, caret);
var sel = window.getSelection();
sel.removeAllRanges();
sel.addRange(range);

来源：https://stackoverflow.com/questions/24115860/set-caret-position-at-a-specific-position-in-contenteditable-div