js的replace, 高亮

最新推荐文章于 2023-08-22 09:39:11 发布

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最新推荐文章于 2023-08-22 09:39:11 发布

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原文链接：http://www.cnblogs.com/enych/p/9828216.html

var str ="123";console.log(str.replace(/\,/g, "")); //输出 123
var str ="123";console.log(str);//输出123
var str ="123";str.replace(/\,/g, ""); //输出  "123"


var str ="123,123";str.replace(/\,/g, "");//输出 123123
//var reg2 = new RegExp("\\{0}", "g")
//new RegExp("\\{" + (i - 1) + "}", "g")

         var str = "123,  1  2  3";
            str =   str.replace(/\ /g, "");//输出 123,123

            var t1 = document.getElementById("js1");
            var htmltxt = t1.textContent;
            var html = t1.innerHTML;
            t1.textContent = '<span style="color: red;">123<span>';
            //t1.innerHTML = "123";
            t1.innerHTML = '<span style="color: red;">123<span>';

<body>
    <pre>
        <code id="js1">
            var clacounts = function (string, ele) {
            var count = 0; //定义
            pos = str.indexOf(ele); ///测试
            while (pos != -1) { //ok
            count++; //搜索
            pos = str.indexOf(ele, pos + 1); //查询
            }
            return count;
            }
        </code>
    </pre>
    <input type="button"  value="test" onclick="test()"/>

    <script>
        var clacounts = function (string, ele) {
            var count = 0; //定义
            pos = str.indexOf(ele); ///测试
            while (pos != -1) { //ok
                count++; //搜索
                pos = str.indexOf(ele, pos + 1); //查询
            }
            return count;
        }
    </script>
    <script>
        function test() {
            var t1 = document.getElementById("js1");

            var html = t1.innerHTML;

            t1.innerHTML = '<span style="color: red;">123</span>';

            var t2 = html.split("\n");
            
            for (var i = 0; i < t2.length; i++) {
                t2[i] = t2[i].replace('var', '<span style="color: red;">var</span>');
            }
            var test = t2.join('\n');
            t1.innerHTML = test;
        }
    </script>
</body>