Question

我有一个HTML页面，我想用Javascript进行客户端替换。我想要替换的值是这样的数组：

var searchFor = new Object();
var replaceWith = new Object();
searchFor =
[
    "quick",
    "brown",
    "fox",
];

replaceWith =
[
    "nimble",
    "black",
    "cat",
];

所以'brown'的每个实例都应该被'black'取代。跨浏览器的最简单方法是什么？

Answer 1

我会使用默认的W3C DOM遍历递归到DOM的所有节点，只选择文本节点进行处理：

// replacer object, containing strings and their replacements
var replacer = {
  "quick": "nimble",
  "brown": "black",
  "fox": "cat"
};

// prepare regex cache
var replacer_re = (function ()
  {
    var replacer_re = {};
    // certain characters are special to regex, they must be escaped
    var re_specials = /[][/.*+?|(){}\\\\]/g; 
    var word;
    for (word in replacer)
    {
      var escaped_word = word.replace(re_specials, "\\\1");
      // add \b word boundary anchors to do whole-word replacing only
      replacer_re[word] = new RegExp("\\b" + escaped_word + "\\b", "g");
    }
    return replacer_re;
  }
)();

// replace function
function ReplaceText(text)
{
  var word;
  for (word in replacer)
    text = text.replace(replacer_re[word], replacer[word]);
  return text;
}

// DOM recursing function
function ReplaceTextRecursive(element)
{
  if (element.childNodes)
  {
    var children = element.childNodes;
    for (var i = children.length - 1; i >= 0; i--)
      ReplaceTextRecursive(children[i]);
  }    

  if (element.nodeType == 3) // 3 == TEXT_NODE
    element.nodeValue = ReplaceText(element.nodeValue);
}

// test it
function test()
{
  ReplaceTextRecursive(document)
}

如何使用Javascript实现客户端替换？

1 个答案: