JavaScript 中数组的展开运算符
展开语法(...)允许我们在需要 0 个以上参数的地方扩展可迭代数组。它允许我们将一些参数作为一个数组传递给函数。
以下是 JavaScript 中实现数组展开运算符的代码 −
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, .sample { font-size: 20px; font-weight: 500; color: blueviolet; } .sample { color: red; } </style> </head> <body> <h1>Spread operator for arrays JavaScript</h1> <div class="sample">[22,55,11,19,55]</div> <div class="result"></div> <br /> <button class="Btn">CLICK HERE</button> <h3>Click on the above button to call the add function and pass the above array as parameter</h3> <script> let BtnEle = document.querySelector(".Btn"); let resEle = document.querySelector(".result"); function add(num1, num2, num3, num4, num5) { return num1 + num2 + num3 + num4 + num5; } let arr = [22, 55, 11, 19, 55]; BtnEle.addEventListener("click", (event) => { resEle.innerHTML = "The sum of the above array = " + add(...arr); }); </script> </body> </html>
输出
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