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| <!-- Example that detects the arrow key by onkeydown Event by using event.keyCode. --> | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>JavaScript | Detecting arrow key presses.</title> | |
| </head> | |
| <body style="text-align:center;" id="body"> | |
| <h1 style="color:green;">JavaScript | Detecting arrow key presses.</h1> | |
| <p id="GFG_UP" style="font-size: 16px;"> Press an arrow key and click the last time.</p> | |
| <button onclick="gfg_Run()">Detect Arrow key</button> | |
| <p id="GFG_DOWN" style="color:green; font-size: 20px; font-weight: bold;"></p> | |
| <script> | |
| let el_up = document.getElementById("GFG_UP"); | |
| let el_down = document.getElementById("GFG_DOWN"); | |
| let str = 'No key pressed'; | |
| function gfg_Run() { | |
| el_down.innerHTML = str; | |
| } | |
| document.onkeydown = function(e) { | |
| switch (e.keyCode) { | |
| case 37: str = 'Left Key pressed!'; | |
| break; | |
| case 38: str = 'Up Key pressed!'; | |
| break; | |
| case 39: str = 'Right Key pressed!'; | |
| break; | |
| case 40: str = 'Down Key pressed!'; | |
| break; | |
| } | |
| }; | |
| </script> | |
| </body> | |
| </html> |
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