JavaScript RegExp test() 方法
javascriptfront end technologyobject oriented programming
RegExp test() 方法用于测试字符串中是否出现匹配。如果匹配，则返回 true，否则返回 false。
以下是 RegExp test() 方法的代码 −
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;
}
div {
font-size: 20px;
font-weight: 500;
}
</style>
</head>
<body>
<h1>JavaScript RegExp test() method</h1>
<div class="sample">The quick brown fox jumps over the lazy dog</div>
<button class="btn">点击此处</button>
<div class="result"></div>
<h3>Click on the above button to check if the above string contains 'fox'.</h3>
<script>
let fillEle = document.querySelector(".sample");
let result = document.querySelector(".result");
let regex = new RegExp("fox");
let regResult = regex.test(fillEle.innerHTML);
document.querySelector(".Btn").addEventListener("click", () => {
if (regResult) result.innerHTML = "The above string contains fox";
else result.innerHTML = "The above string doesn't contain fox";
});
</script>
</body>
</html>
输出
点击“CLICK HERE”按钮 −
