![onDomReady]( "onDomReady")
本文介绍了选择onclick onchange不起作用的处理方法，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
我一直试图弄清楚现在几个小时，我不明白为什么我的JavaScript不工作。我有一个像这样的选择按钮
< select onclick =populateList（）>
< option> 1< / option>
< option> 2< / option>
< / select>
我的Javascript位于同一个文件夹中，链接为：
< script src =script.js>< / script>
在该文件中，函数非常简单。 Just：
函数populateList（）{
console.log（Test）;
}
它不起作用。任何想法为什么？
编辑：
我试过做onchange，onchange（）， onclick，onclick（），onClick（）等。仍然没有。
Edit2：我没有改变一件事，但它开始工作。谢谢你们。非常喜欢。
编辑3：Nevermind。我至少确定它在脚本直接在html中，但不在script.js中时可以工作
解决方案 尝试使用此代码，在中工作：
JS部分：
$ b
函数populateList（）{
alert（测试）;
}
HTML部分：
< select onchange =populateList（）;>
< option> 1< / option>
< option> 2< / option>
编辑：
正如您在编辑中所说的那样，它在脚本中工作，但不是 JS 。我猜这是因为它被包装在 onLoad 或 onDomReady 函数中 - 请参阅：
，除了 onclick 到 onchange html 和 console.log 到 alert 在 js 中。完美工作。
I've been trying to figure this out for hours now and I can't understand why my javascript isn't working. I have a select button like this
<select onclick="populateList()">
<option>1</option>
<option>2</option>
</select>
My Javascript is in the same folder and is linked as:
<script src="script.js"></script>
In that file, the function is so simple. Just:
function populateList() {
console.log("Test");
}
And it won't work. Any ideas as to why?
EDIT:
I've tried doing the onchange, onchange(), onclick, onclick(), onClick(), ect. and still nothing.
Edit2:I didn't change a thing but it started working. Thank you all. Much love.
Edit 3: Nevermind. I've determined at least that it works when the script is directly in the html but not when it's in script.js
解决方案
Try using this code, working in JSFiddle:
JS part:
function populateList(){
alert("Test");
}
HTML part:
<select onchange="populateList();">
<option>1</option>
<option>2</option>
</select>
Edit:
As you said in your edit, it works when it's in the script but not the JS. The reason I can guess for this is it's wrapped in an onLoad or onDomReady function - see this:
http://jsfiddle.net/xUk5K/1/
Note that that jsfiddle only works when Framework is set to 'no wrap (head or body)', and not onDomReady or onLoad.
If in your js file your code is wrapped in something like
$(document).ready(function(){
function populateList(){
alert("Test");
}
});
It won't work. Try removing it from that and placing it at the very top by itself in your attached js file and attach the js file in the very same location you're now hard coding the js in your script - is it working now?
Here's the code in an actual html and js file, with absolutely nothing changed except onclick to onchange in the html and console.log to alert in the js. Working perfectly.
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