Question

是否有一个简单的js函数可以用来替换当前文档的选择与我的一些html？

例如，假设某个文档包含AHAHAHA，并且用户选择第一个“ha”文本块。

现在我想用以下内容替换它：hoho

当我google for * javascript替换选择* 我无法得到一个简单明了的答案！

Answer 1

是。以下将在所有主流浏览器中执行此操作，并可选择在注释中按要求选择插入的内容（尽管此部分未针对IE＆lt; = 8实现）：

代码：

function replaceSelection(html, selectInserted) {
    var sel, range, fragment;

    if (typeof window.getSelection != "undefined") {
        // IE 9 and other non-IE browsers
        sel = window.getSelection();

        // Test that the Selection object contains at least one Range
        if (sel.getRangeAt && sel.rangeCount) {
            // Get the first Range (only Firefox supports more than one)
            range = window.getSelection().getRangeAt(0);
            range.deleteContents();

            // Create a DocumentFragment to insert and populate it with HTML
            // Need to test for the existence of range.createContextualFragment
            // because it's non-standard and IE 9 does not support it
            if (range.createContextualFragment) {
                fragment = range.createContextualFragment(html);
            } else {
                // In IE 9 we need to use innerHTML of a temporary element
                var div = document.createElement("div"), child;
                div.innerHTML = html;
                fragment = document.createDocumentFragment();
                while ( (child = div.firstChild) ) {
                    fragment.appendChild(child);
                }
            }
            var firstInsertedNode = fragment.firstChild;
            var lastInsertedNode = fragment.lastChild;
            range.insertNode(fragment);
            if (selectInserted) {
                if (firstInsertedNode) {
                    range.setStartBefore(firstInsertedNode);
                    range.setEndAfter(lastInsertedNode);
                }
                sel.removeAllRanges();
                sel.addRange(range);
            }
        }
    } else if (document.selection && document.selection.type != "Control") {
        // IE 8 and below
        range = document.selection.createRange();
        range.pasteHTML(html);
    }
}

示例：

replaceSelection('<span><font color="red">hoho</font></span>', true);

Answer 2

您可以使用Rangy库 http://code.google.com/p/rangy/

然后你可以做

var sel = rangy.getSelection();
var range = sel.getRangeAt(0);

range.deleteContents();
var node = range.createContextualFragment('<span><font color="red">hoho</font></span>');
range.insertNode(node);

javascript替换选择所有浏览器

2 个答案: