JavaScript 数组原型构造函数
JavaScript 数组原型构造函数用于向数组对象添加新方法和属性。这些属性和方法将对每个数组可用。
以下是数组原型构造函数的代码:-
举例
<!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: 20px; font-weight: 500; } </style> </head> <body> <h1>JavaScript Array prototype Constructor</h1> <div class="sample"></div> <button class="Btn">CLICK HERE</button> <h3> Click on the above button to convert the string to upper and lowercase alternatively </h3> <script> Array.prototype.upperLower = function () { for (let i = 0; i < this.length; i++) { if (i % 2 == 0) this[i] = this[i].toUpperCase(); else this[i] = this[i].toLowerCase(); } }; let fillEle = document.querySelector(".sample"); let arr = ["H", "E", "L", "L", "O"]; fillEle.innerHTML = arr; arr.upperLower(); document.querySelector(".Btn").addEventListener("click", () => { fillEle.innerHTML = arr; }); </script> </body> </html>
输出
单击“单击此按钮”按钮后,将调用自定义数组函数:-
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