Created
December 13, 2023 09:59
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Event listener on a CSS pseudo-element.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"> | |
| <title>Event listener on a CSS pseudo-elemen</title> | |
| <style> | |
| #box { | |
| position: relative; | |
| height: 300px; | |
| width: 300px; | |
| background: #d3d1e6; | |
| } | |
| #box::after { | |
| content: ""; | |
| position: absolute; | |
| bottom: 0; | |
| left: 0; | |
| width: 15px; | |
| height: 15px; | |
| background-color: #ff0000; | |
| cursor: pointer; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="box"></div> | |
| <script> | |
| const box = document.getElementById('box'); | |
| const computedStyle = window.getComputedStyle(box, ':after'); | |
| const pseudoWidth = parseInt(computedStyle.width ?? 0); | |
| const pseudoHeight = parseInt(computedStyle.height ?? 0); | |
| box.addEventListener('click', (e) => { | |
| // Check if the click occurred on the pseudo-element :after | |
| console.log(e.offsetX, e.offsetY) | |
| if (e.offsetX < pseudoWidth && e.offsetY >= (box.offsetHeight - pseudoHeight)) { | |
| console.log('Clicked on pseudo-element :after'); | |
| } | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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