google.setOnLoadCallback无法获取文档元素 [英] google.setOnLoadCallback not able to get the document elements
问题描述
我试图使用JQuery获得一些图表功能，但是我不能在可视化API加载后得到任何文档元素。下面是我的示例示例：
I am trying to get some graph functionalities with corechart using JQuery but I am not able to get any document elements once the visualization APIs are loaded. Below is my sample example:
$(document).ready(function() {
if ($("#myId").length > 0) {
google.load("visualization", "1.1", {
packages: ["corechart"]
});
google.setOnLoadCallback(function() {
if ($("#myId").length > 0) {
alert("Found a match!!");
}else{
alert("Not found!!");
}
});
}
});
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
<link rel="stylesheet" href="style.css" />
<script src="script.js"></script>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
</head>
<body>
<h1>Hello Plunker!</h1>
<div id="myId">Hello from Div!!</div>
</body>
</html>
警报在我的if块被执行。我只是在检查#myId之后加载可视化包，但在回调中丢失（而不是所有的html元素）。请咨询
I want the alert in my if block to be executed. I am loading the visualization packages only after the check for #myId but its lost(rather all the html elements) in the call back. Please advice
推荐答案
我认为它可能与 setOnLoadCallback 。
不过，您可以在 load 语句中添加对回调的引用。
I think it may have something to do with setOnLoadCallback.
However, you can add a reference to the callback in the load statement.
$(document).ready(function(){
if ($("#myId").length > 0) {
google.load('visualization', '1', {
'packages': ['corechart'],
'callback': function(){
if ($("#myId").length > 0) {
alert("Found a match!!");
}else{
alert("Not found!!");
}
}
});
}
});
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
<link rel="stylesheet" href="style.css" />
<script src="script.js"></script>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
</head>
<body>
<h1>Hello Plunker!</h1>
<div id="myId">Hello from Div!!</div>
</body>
</html>
> setOnLoadCallback 会执行双重任务，而不仅仅是等待 google.load ...
，而且还有文档
，因为文档弄脏了...
I think setOnLoadCallback pulls double duty and not only waits for google.load...
but also the document
since document has already been loaded, maybe something gets fouled up...
这篇关于google.setOnLoadCallback无法获取文档元素的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
