为什么我的JavaScript函数不在我的div中调用? [英] Why is my javascript function not being called in my div?

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问题描述

我想要一个div只调用一个函数(不移动我的位置在页面上),而不是调用我的JavaScript函数 - 它移动我的位置在页面上



我做错了什么? (在joomla内部运行)



为什么我的JavaScript中没有调用我的JavaScript函数?

  http://....com/test.php#p3 


< div id =p1onclick =testFunction()> ;
< / div>

< div id =p3>部分内容< / div>
< script type =text / javascript>
testFunction();
< / script>
< / div>


< script type =text / javascript>


function testFunction(){
alert(Test);
}
< / script>


解决方案

这是因为你有两个单独的脚本块,一个调用在第二个定义的函数。

 < div id =p1onclick =testFunction() >点击我< / div> 
< div id =p3>部分内容< / div>
< script type =text / javascript>
testFunction();
function testFunction(){
alert(Test);
}
< / script>

注释说你需要在顶部定义它们不是真的,请看这里: http://jsfiddle.net/xDf5e/



他们会是true如果你定义了一个变量函数: var testFunction = function(... 。一般来说,你应该在JS块的顶部定义函数,可读性和可维护性,但这不是你的脚本不工作的原因。



注意:你可以看到onclick工作以及在我给你的例子。 p>

你有一个关于函数提升的教程: http://elegantcode.com/2011/03/24/basic-javascript-part-12-function-hoisting/


I want a div to just call a function(not move my position on the page) but instead of calling my JavaScript function - it moves my location on the page

what am I doing wrong? (running inside of joomla)

Why is my JavaScript function not being called in my div?

http://....com/test.php#p3


<div id="p1" onclick="testFunction()"> 
</div>

<div id="p3">Some content</div>
<script type="text/javascript">
   testFunction();
</script>
</div>


<script type="text/javascript">


function testFunction() {
   alert("Test");
}
</script>

解决方案

It's because you have two separate script blocks, the first one calling the function defined in the second one. Put them into one single block and it will work.

<div id="p1" onclick="testFunction()">click me</div>
<div id="p3">Some content</div>
<script type="text/javascript">
testFunction();
function testFunction() {
    alert("Test");
}
</script>

Comments saying you need to define it at the top are not true, see here: http://jsfiddle.net/xDf5e/

They would be true if you defined a variable function like: var testFunction = function(.... Generally, you should define functions at the top of your JS blocks, it makes the code more readable and maintanable, but that's not the reason your script is not working.

Note: you can see the onclick works fine as well in the example I gave you.

You have a nice tutorial about function hoisting here: http://elegantcode.com/2011/03/24/basic-javascript-part-12-function-hoisting/

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