javascript 未捕获的 ReferenceError：未定义 myFunction
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Uncaught ReferenceError: myFunction is not defined
提问by fuddin
Gives an error. I have placed the code just before </body>. Still getting the error.
给出一个错误。我已经在之前放置了代码</body>。仍然收到错误。
<form action="" method="get" id="searchform" >
<input name="q" type="text" id="search" size="32" maxlength="128" class="txt">
<input type="button" id="hit" value="Search" onclick="myFunction();return false" class="btn">
</form>
JS,
JS，
<script type="text/javascript">
var nexturl = "";
var lastid = "";
var param;
$(document).ready(function () {
function myFunction() {
param = $('#search').val();
alert("I am an alert box!");
if (param != "") {
$("#status").show();
var u = 'https://graph.facebook.com/search/?callback=&limit=100&q=' + param;
getResults(u);
}
}
$("#more").click(function () {
$("#status").show();
$("#more").hide();
pageTracker._trackPageview('/?q=/more');
var u = nexturl;
getResults(u);
});
});
</script>
回答by ATOzTOA
You cannot place myFunctionafter the onclick. When the onclickis seen there is no definition for myFunction.
你不能把myFunction后onclick。当onclick看到 时 没有定义myFunction。
Place the JavaScript in <head>tag. Also, move the function outside of ready().
将 JavaScript 放入<head>标签中。此外，将函数移出ready().
Like this:
像这样：
<script type="text/javascript">
var nexturl ="";
var lastid ="";
var param;
function myFunction() {
param = $('#search').val();
alert("I am an alert box!");
if (param != "") {
$("#status").show();
var u = 'https://graph.facebook.com/search/?callback=&limit=100&q='+param;
getResults(u);
}
}
$(document).ready(function() {
$("#more").click(function () {
$("#status").show();
$("#more").hide();
pageTracker._trackPageview('/?q=/more');
var u = nexturl;
getResults(u);
});
});
</script>
</head>
<body>
...
回答by PSR
keep myFunction in script tag directly
将 myFunction 直接保存在 script 标签中
i.e
<script>
function myFunction() {
.....
}
</script>
回答by Cianan Sims
From the jQuery docs:
来自jQuery 文档：
The handler passed to .ready() is guaranteed to be executed after the DOM is ready, so this is usually the best place to attach all other event handlers and run other jQuery code.
传递给 .ready() 的处理程序保证在 DOM 准备好后执行，因此这通常是附加所有其他事件处理程序和运行其他 jQuery 代码的最佳位置。
So your function isn't created until after your onclick is established. Thus it can't find the function. You'll want to move it outside the $(document).ready(function(){}).
因此，直到您的 onclick 建立之后，您的函数才会被创建。因此它无法找到该函数。你会想把它移到$(document).ready(function(){}).
回答by Rodolfo Velasco
You have to move the function outside the $document.readyhere then you will have two options: 1st move it to <head>or 2nd move it right before the closing $document.readybracket. Use this type of declaration for your function myFunction(){alert("inside my function");};
您必须将函数移到$document.ready此处之外，然后您将有两个选择：第一个将其移动到<head>或第二个将其移动到右$document.ready括号之前。为您的函数使用这种类型的声明myFunction(){alert("inside my function");};
