在大多数浏览器中，您可以使用从选择中获得的 Range 的 insertNode() 方法.在 IE 中9 你可以使用 pasteHTML()，正如你提到的.下面是在所有主要浏览器中执行此操作的函数.如果内容已经被选中，它会被替换，所以这实际上是一个粘贴操作.另外，我添加了代码，将插入符号放在插入内容的末尾.

In most browsers, you can use the insertNode() method of the Range you obtain from the selection. In IE < 9 you can use pasteHTML(), as you mentioned. Below is a function to do this in all major browsers. If content is already selected, it is replaced, so this is effectively a paste operation. Also, I added code to place the caret after the end of the inserted content.

jsFiddle:http://jsfiddle.net/jwvha/1/

代码:

function pasteHtmlAtCaret(html) {
    var sel, range;
    if (window.getSelection) {
        // IE9 and non-IE
        sel = window.getSelection();
        if (sel.getRangeAt && sel.rangeCount) {
            range = sel.getRangeAt(0);
            range.deleteContents();

            // Range.createContextualFragment() would be useful here but is
            // only relatively recently standardized and is not supported in
            // some browsers (IE9, for one)
            var el = document.createElement("div");
            el.innerHTML = html;
            var frag = document.createDocumentFragment(), node, lastNode;
            while ( (node = el.firstChild) ) {
                lastNode = frag.appendChild(node);
            }
            range.insertNode(frag);

            // Preserve the selection
            if (lastNode) {
                range = range.cloneRange();
                range.setStartAfter(lastNode);
                range.collapse(true);
                sel.removeAllRanges();
                sel.addRange(range);
            }
        }
    } else if (document.selection && document.selection.type != "Control") {
        // IE < 9
        document.selection.createRange().pasteHTML(html);
    }
}

2013 年 8 月 21 日更新

根据评论中的要求，这里有一个更新的示例，其中包含一个额外的参数，用于指定是否选择插入的内容.

As requested in the comments, here is an updated example with an extra parameter that specifies whether or not to select the inserted content.

演示:http://jsfiddle.net/timdown/jwvha/527/

代码:

function pasteHtmlAtCaret(html, selectPastedContent) {
    var sel, range;
    if (window.getSelection) {
        // IE9 and non-IE
        sel = window.getSelection();
        if (sel.getRangeAt && sel.rangeCount) {
            range = sel.getRangeAt(0);
            range.deleteContents();

            // Range.createContextualFragment() would be useful here but is
            // only relatively recently standardized and is not supported in
            // some browsers (IE9, for one)
            var el = document.createElement("div");
            el.innerHTML = html;
            var frag = document.createDocumentFragment(), node, lastNode;
            while ( (node = el.firstChild) ) {
                lastNode = frag.appendChild(node);
            }
            var firstNode = frag.firstChild;
            range.insertNode(frag);

            // Preserve the selection
            if (lastNode) {
                range = range.cloneRange();
                range.setStartAfter(lastNode);
                if (selectPastedContent) {
                    range.setStartBefore(firstNode);
                } else {
                    range.collapse(true);
                }
                sel.removeAllRanges();
                sel.addRange(range);
            }
        }
    } else if ( (sel = document.selection) && sel.type != "Control") {
        // IE < 9
        var originalRange = sel.createRange();
        originalRange.collapse(true);
        sel.createRange().pasteHTML(html);
        if (selectPastedContent) {
            range = sel.createRange();
            range.setEndPoint("StartToStart", originalRange);
            range.select();
        }
    }
}