June 26, 2020
How to Swap Two Variables Without Using Third Variable in Javascript
HTML:
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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <link rel="stylesheet" href="style.css"> <title>Document</title> </head> <body> <div> <button>Get</button> <h1>Result</h1> </div> <script src="script.js"></script> </body> </html> |
CSS:
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body { text-align: center; } div { display: inline-block; } button{ display: inline-block; padding: 10px 20px; } |
Javascript:
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let btnGet = document.querySelector('button'); let result = document.querySelector('h1'); let a = 'James'; let b = 'Marks'; btnGet.addEventListener('click', () =>{ [b, a] = [a,b]; result.innerText = `a: ${a} - b: ${b}`; }); |