JavaScript exec() 方法

exec() 方法執行匹配搜尋，如果在指定字串中找到匹配的文字，則返回該文字，否則返回空值。

以下是 JavaScript exec() 方法的程式碼 -

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 {
      font-size: 18px;
      font-weight: 500;
   }
</style>
</head>
<body>
<h1>JavaScript exec()</h1>
<div class="sample">
Lorem ipsum dolor, sit amet consectetur adipisicing.
</div>
<button class="Btn">CLICK HERE</button>
<h3>
Click on the above buttons to execute regex
</h3>
<script>
   let sampleEle = document.querySelector(".sample");
   let sampleStr = sampleEle.innerHTML;
   let pattern = new RegExp("amet");
   document.querySelector(".Btn").addEventListener("click", () => {
      let result = pattern.exec(sampleStr);
      sampleEle.innerHTML += " <br> String matched = " + result;
   });
</script>
</body>
</html>