javascript - js怎麼讓輸入框自動取得焦點？

Question

element.focus()沒用，沒有遊標閃爍的聚焦效果，那該怎麼做？

<input autofocus="autofocus" id="input">
//js
document.getElementById('input').focus();//我执行这句语句的时候光标没有自动聚焦，还是blur状态

Answer 1

autofocus HTML5
This Boolean attribute lets you specify that a form control should have input focus when the page loads, unless the user overrides it, for example by ty ty introi​​nent control. attribute, which is a Boolean. It cannot be applied if the type attribute is set to hidden (that is, you cannot automatically set focus to a hidden control).

給輸入框加上這個屬性就行了
mdn連結

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另外不懂為什麼 element.focus()會沒用。不貼出程式碼無法解決，隨手寫了一下測試是有用的

Answer 2

trigger，模擬點擊