富文本编辑器原理

原创于 2016-09-20 14:11:15 发布 · 1.2k 阅读

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <script src="../base/jquery.js"></script>
    <style>
        .container {
            width: 200px;
            height: 200px;
            border: 1px solid gray;
        }
    </style>
</head>
<body>
<div id="J_simpleEditor">
    <a class="J_tool">斜体</a>

    <div class="container  J_container" contenteditable="true">
        aaa
    </div>
</div>
<script>
    (function ($) {
        $.fn.simpleEditor = function () {
            var that = this;
            this.find(".J_container").on("mouseup keyup mouseout", function () {
                var sel = window.getSelection();
                if (sel.getRangeAt && sel.rangeCount) {
                    that.selectedRange = sel.getRangeAt(0);
                }
            })
            this.find(".J_tool").click(function () {
                var selection = window.getSelection();
                if (that.selectedRange) {
                    selection.removeAllRanges();
                    selection.addRange(that.selectedRange);
                }
                document.execCommand("Italic");
            })
        }
    })(window.jQuery)
</script>

<script>
    $(function () {
        $("#J_simpleEditor").simpleEditor();
    })
</script>
</body>
</html>