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[英]Request keeps on getting Error code: 400 - can someone please have a look on what I'm doing wrong?
[英]I have been adding an event Listener to this button and getting an error. What I'm I doing wrong?
我一直在嘗試向此按鈕添加事件偵聽器並收到 Uncaught TypeError: Cannot read property 'addEventListener' of null
let button = document.getElementById('submit'); function hello() { console.log("hello"); } button.addEventListener('click', hello);
<div class="button"> <button id="submit">Submit</button> </div>
也許是因為 js 在 html 之前加載。 嘗試將您的 js 代碼放入此 function 中:
window.onload = () => {
\\ your js code
}
代碼看起來很好,實際上正在工作!
但是,當您忘記或錯誤輸入元素的 id/class 時,通常會發生此問題。 所以當腳本嘗試監聽事件時,他無法找到元素。
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