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Effective Function Signatures with Default and Rest Parameters in JavaScript
Following is the code for to implement function Signatures with Default and Rest Parameters in JavaScript −
Example
<!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>Function Signatures with Default and Rest Parameters</h1> <div class="result"></div> <br /> <button class="Btn">CLICK HERE</button> <h3>Click on the above button to call the add() function with multiple parameters</h3> <script> let BtnEle = document.querySelector(".Btn"); let resEle = document.querySelector(".result"); function add(a = 0, b = 0, ...param) { let total = 0; total += a + b; param.forEach((item) => { total += item; }); return total; } BtnEle.addEventListener("click", (event) => { resEle.innerHTML = "The total sum = " + add(2, null, 22, 11, 33, 44, 55); }); </script> </body> </html> Output
On clicking the ‘CLICK HERE’ button −
Updated on: 2020-07-18T07:37:05+05:30
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