JavaScript 正则表达式

javascriptweb developmentobject oriented programming更新于 2025/12/13 14:04:17

正则表达式是描述搜索模式的字符串。然后使用此搜索模式来指定我们在文本中搜索的内容。

以下是 JavaScript 中正则表达式的代码 −

示例

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   }
   .sample,.result{
      font-size: 18px;
      font-weight: 500;
      color:red;
   }
</style>
</head>
<body>
<h1>JavaScript Regular Expressions</h1>
<div class="sample">The king bought the ring and went to the palace.</div>
<div style='color:black' class="result"></div>
<button class="btn">点击此处</button>
<h3>
Click on the above button to replace king with queen in the text above
</h3>
<script>
   let sampleEle = document.querySelector('.sample');
   let resultEle = document.querySelector('.result');
   document.querySelector('.Btn').addEventListener('click',()=>{
      let newText = sampleEle.innerHTML.replace(/king/gi,'queen');
      resultEle.innerHTML = 'Result = ' + newText;
   })
</script>
</body>
</html>