Is there any situation where I would have to set the focus on a input text first (document.getElementById( the_input_text ).focus() )
before I could set the value (document.getElementById( the_input_text ).value= 123 ) in order for me to see the value (123) in the input text?
我之所以问,是因为我必须在我正在编写的这一页上这样做,以便让我看到输入文本的价值。
不,没有需要首先聚焦元素的案例... 除非有一些可怕的, 分别的 JavaScript 反复艰难地决定值 直到或除非焦点突出。
你可以尝试:
setTimeout(function(){
document.getElementById( the_input_text ).value= 123
},2000);
...看看是否有JS在设定你的价值观后 压倒了你的价值观
I tested 以确保 HTML5 占位符="... 属性不会引起问题。
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