3

此代码试图突出显示(通过添加“粗体”标签)HTML 正文中的某些字符。(这些是在 JS 函数中指定的)但不是文本变为粗体,而是在呈现的 html 页面中得到“粗体”标签作为结果。

虽然我想要一些类似的东西

这是一条测试消息

我明白了

This is a test <b>message</>

任何帮助都是极好的。

    <!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<title>Test</title>

<script>

function myFunction(){
        var children = document.body.childNodes;
    for(var len = children.length, child=0; child<len; child++){
     if (children[child].nodeType === 3){ // textnode
        var highLight = new Array('abcd', 'edge', 'rss feeds');
        var contents = children[child].nodeValue;
        var output = contents;
        for(var i =0;i<highLight.length;i++){
            output = delimiter(output, highLight[i]); 
        }


    children[child].nodeValue= output; 
    }
    }
}

function delimiter(input, value) {
    return unescape(input.replace(new RegExp('(\\b)(' + value + ')(\\b)','ig'), '$1<b>$2</b>$3'));
}
</script>



</head>
<body>
<img src="http://some.web.site/image.jpg" title="abcd"/>

These words are highlighted: knorex, edge, rss feeds while these words are not: knewedge, abcdef, rss feedssss

<input type ="button" value="Button" onclick = "myFunction()">
</body>
</html>
4

2 回答 2

2

问题是您将 HTML 放入文本节点,因此它被严格作为文本进行评估。一个简单的解决方法是简单地对 body 元素的 innerHTML 进行操作,如下所示:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<title>Test</title>

<script>

function myFunction(){
  var highLight = ['abcd', 'edge', 'rss feeds'],
      contents = document.body.innerHTML;

  for( i = 0; i < highLight.length; i++ ){
    contents = delimiter(contents, highLight[i]); 
  }

  document.body.innerHTML = contents;
}

function delimiter(input, value) {
  return input.replace(new RegExp('(\\b)(' + value + ')(\\b)','ig'), '$1<b>$2</b>$3');
}
</script>



</head>
<body>
<img src="http://some.web.site/image.jpg" title="abcd"/>

These words are highlighted: knorex, edge, rss feeds while these words are not: knewedge, abcdef, rss feedssss

<input type ="button" value="Button" onclick = "myFunction()">
</body>
</html>
于 2013-01-22T12:43:23.327 回答
1

textNode 不能有子元素,因此需要替换它,一种方式;

代替

children[child].nodeValue = output;

var n = document.createElement("span");
n.innerHTML = output;
children[child].parentNode.replaceChild(n, children[child]);
于 2013-01-22T12:45:24.890 回答