如何使用 JavaScript 禁用 textarea 中的箭头键？给定一个包含 元素的 HTML 元素，任务是在 JavaScript 的帮助下禁用箭头键滚动。</p><p><strong>方法一：</strong></p><ul><li>在窗口上添加事件监听器<strong>onkeydown</strong> 。</li><li>如果事件发生，则检查键是否为箭头。</li><li>如果按下箭头键，则阻止其默认行为。</li></ul><p><strong>示例：</strong>此示例实现了上述方法。 </p><div class="hcb_wrap"><pre class="prism undefined-numbers lang-js" data-lang="JavaScript"><code class="replace"><!DOCTYPE HTML> <html> <head> <title> How to disable arrow key in textarea using JavaScript ? </title> <style> #t { height: 100px; width: 300px; background: green; color: white; } </style> </head> <body style = "text-align:center;"> <h1 style = "color:green;" > GeeksforGeeks </h1> <p id = "GFG_UP" style = "font-size: 15px; font-weight: bold;"> </p> <textarea id = "t"> JavaScript was once upon a time used only in client side(browser), but node js (execution engine/run time/web server) have made possible to run javascript on server side. JavaScript has stormed the web technology and nowadays small software ventures to fortune 500, all are using node js for web apps. click here