输入键执行功能 [英] execute function on enter key
本文介绍了输入键执行功能的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
现在我有:
HTML:
输入您的工资:< input type =textid =工资value =size = 20>
< button id =sub> Submit< / button>
Javascript:
code> var wage = document.getElementById(工资);
wage.addEventListener(change,validate);
var btn = document.getElementById(sub);
btn.addEventListener(click,validate);
因此,当我点击或更改文本时,基本上激活函数validate(),但是我想调用
解决方案
你可以使用这个:
var wage = document.getElementById(工资);
wage.addEventListener(keydown,function(e){
if(e.keyCode === 13){//检查按下的键是否为Enter
validate(e );
}
});
函数validate(e){
var text = e.target.value;
//验证输入...
}
I have an input and I'd simply like to add an event listener for it to activate a function when I press enter, when the input is focused. How do I do this with pure JS?
Right now I have:
HTML:
Enter your wage:<input type="text" id="wage" value ="" size=20>
<button id="sub">Submit</button>
Javascript:
var wage = document.getElementById("wage");
wage.addEventListener("change", validate);
var btn = document.getElementById("sub");
btn.addEventListener("click", validate);
So basically the function validate() activates when I click OR change the text, but I want to call it by pressing enter.
解决方案
You can use this:
var wage = document.getElementById("wage");
wage.addEventListener("keydown", function (e) {
if (e.keyCode === 13) { //checks whether the pressed key is "Enter"
validate(e);
}
});
function validate(e) {
var text = e.target.value;
//validation of the input...
}
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