Created
April 9, 2024 10:52
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Defer attribute in Javascript
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0" /> | |
| <title>Async vs Defer</title> | |
| <script> | |
| console.log('Start HTML Parsing'); | |
| </script> | |
| </head> | |
| <body> | |
| <p>Hello, World</p> | |
| <script src="index.js" defer></script> | |
| <div class="content"> | |
| <span>Span element</span> | |
| </div> | |
| <script> | |
| console.log('End HTML Parsing'); | |
| </script> | |
| </body> | |
| </html> |
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| // DOM Event fire after script is executed. | |
| document.addEventListener('DOMContentLoaded', () => | |
| alert('DOM ready after defer!') | |
| ); | |
| let sum = 0; | |
| for (let i = 0; i < 10000000; i++) { | |
| sum += i; | |
| } | |
| console.log('Script is Executed, Sum is : ', sum); |
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