JavaScript 函数调用中的扩展运算符

javascriptweb developmentobject oriented programming更新于 2025/9/3 7:08:17

扩展语法允许我们在函数调用中将数组或任何可迭代对象扩展至零个或多个参数。

以下是 JavaScript 函数调用中扩展运算符的代码 −

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;
   }
   .result {
      font-size: 20px;
      font-weight: 500;
      color: blueviolet;
   }
</style>
</head>
<body>
<h1>Spread operator in function calls</h1>
<div class="result"></div>
<br />
<button class="btn">点击此处</button>
<h3>Click on the above button to use spread operator to pass parameters to add() function</h3>
<script>
   let resEle = document.querySelector(".result");
   let BtnEle = document.querySelector(".Btn");
   function add(a, b, c, d) {
      return a + b + c + d;
   }
   let arr = [1, 2, 3, 4];
   BtnEle.addEventListener("click", () => {
      resEle.innerHTML = add(...arr);
   });
</script>
</body>
</html>