July 9, 2020
How to Check if Variable is Array 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>Check</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 btnCheck = document.querySelector('button'); let result = document.querySelector('h1'); let user = ['Peter']; btnCheck.addEventListener('click', () => { result.innerText = Array.isArray(user) ? 'True' : 'False'; }); |