本文介绍了Uncaught ReferenceError：$在jQuery中没有定义错误的处理方法，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
我在 jQuery 中有这样的代码:(文件名是javascript.js ...我之前使用的是JavaScript）
I have this code in jQuery: (the file name is javascript.js ...I was using JavaScript before...)
$(document).ready(function() {
$("#readFile").click(function() {
$.get('test.txt', function(data) {
$("#bottom_pane_options").html(data); // #bottom_pane_options is the div I want the data to go
}, 'text');
});
});
...在HTML中：
...and this in HTML:
<!DOCTYPE html>
<html>
<head>
<title>Culminating</title>
<link href="style.css" rel="stylesheet" type="text/css">
<script type="text/javascript" src="./javascript.js"></script>
<script
src="http://maps.googleapis.com/maps/api/js?key=AIzaSyCJnj2nWoM86eU8Bq2G4lSNz3udIkZT4YY&sensor=false">
</script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<script>
function initialize()
{
var mapProp = {
center:new google.maps.LatLng(50.569283,-84.378433),
zoom:5,
mapTypeId:google.maps.MapTypeId.TERRAIN
};
var map=new google.maps.Map(document.getElementById("googleMap"),mapProp);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div class="content">
<div id="googleMap"></div>
<div id="right_pane_results">hi</div>
<div id="bottom_pane_options">
<button id="readFile">Read File</button>
</div>
</div>
</body>
当我检查控制台时，我得到了 Uncaught ReferenceError ，说在第一行没有定义 $ 。我假设它是指第一行的第一个字符。我从一个网站得到这个代码，我是 jquery 的新手，所以我不确定这里出了什么问题。
When I check the console, I get the Uncaught ReferenceError saying that $ is not defined on the first line. I'm assuming that it is referring to the first character on the first line. I got this code from a website and I'm new to jQuery so I'm not sure what is going wrong here.
有什么建议？
推荐答案
您的脚本（首先是jQuery）：
Change the order you're including your scripts (jQuery first):
<script src="http://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<script type="text/javascript" src="./javascript.js"></script>
<script
src="http://maps.googleapis.com/maps/api/js?key=YOUR_APIKEY&sensor=false">
</script>
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