新手陷入jQuery警报，无法在浏览器中提示通知

Question

I started learning jQuery on thenewboston.com and got stuck after a dozen tutorials. 我开始在thenewboston.com上学习jQuery，并在打了12个教程后陷入困境。 When I was learning JavaScript, I had no problem with alerts and prompts - they would pop up in the browser. 在学习JavaScript时，警报和提示没有问题-它们会在浏览器中弹出。 I started having problems after I stared learning jQuery. 在开始学习jQuery之后，我开始遇到问题。

I have a simple code that should count all the elements on the page and prompt user the number of elements. 我有一个简单的代码，应该计算页面上的所有元素并提示用户元素的数量。

For index.html file: 对于index.html文件：

<html>
<head>
</head>
<body>

    <p>Some text.</p>

<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript" src="js/selectors.js"></script>
</body>
</html>

For selectors.js file: 对于selectors.js文件：

var count = $('*').length;
alert(count);

jquery.js is filled with code downloaded from the official jQuery site (compressed production version). jquery.js充满了从官方jQuery站点下载的代码（压缩的生产版本）。

The code you see here is provided by thenewboston.com instructor, and I checked it dozens of times for mistakes (the videos appear a bit older, don't know if something drastically changed in the meantime). 您在此处看到的代码是由thenewboston.com讲师提供的，我已经对它进行了数十次错误检查（这些视频看起来有些旧，不知道其间是否发生了重大变化）。 Also, file architecture is fine. 同样，文件体系结构也很好。 Both jquery.js and selectors.js are within js folder, and index.html is in root. jquery.js和selectors.js都在js文件夹中，而index.html在根目录中。

What I try so far after googling: 谷歌搜索后我到目前为止尝试的操作：

tried Firefox and Chrome 尝试过Firefox和Chrome
tinkered with permission settings in both browsers (turned notifications off and on) 在两个浏览器中都修改了权限设置（打开和关闭通知）
tried putting the -script- code within the -head- tags 尝试将-script-代码放入-head-标签中
tried changing type="text/javascript" to type="application/javascript" within -script- tags 尝试在-script-标记中将type="text/javascript"更改为type="application/javascript"

Sorry, I changed <> symbols with -- because I had some formatting issues within bulleted lists. 抱歉，我用-更改了<>符号，因为项目符号列表中存在一些格式问题。

I tried researching, but I couldn't find a solution to this problem. 我尝试研究，但是找不到解决此问题的方法。 I found something similar (I think on stackoverflow even), and the OP managed to find a solution by turning his browser notifications on. 我发现了类似的东西（甚至在stackoverflow上也是如此），OP通过打开浏览器通知设法找到了解决方案。

Answer 1

This code works just fine . 这段代码可以正常工作。

var count = $('*').length;
alert(count);

You can even run it in the dev console, and it works. 您甚至可以在开发控制台中运行它，并且可以运行。

Answer 2

Okay, nvm guys I found a solution... 好的，我找到了一个解决办法……

I was using Firefox when I was downloading jQuery. 我在下载jQuery时使用的是Firefox。 What happened was that Firefox opened a new tab with all the code after clicking download. 发生的事情是Firefox单击下载后，打开了一个包含所有代码的新标签。 I copy-pasted that code to my empty text file and called it jQuery.js. 我将该代码复制粘贴到我的空文本文件中，并将其命名为jQuery.js。

Now using Chrome, I downloaded it again, and it was the real deal. 现在使用Chrome浏览器，我再次下载了它，确实很划算。 I just renamed it, and put it in the js folder, and voila. 我刚刚将其重命名，并将其放在js文件夹中，瞧。 feeling stupid 感到愚蠢

Thx for the answers and effort guys! 谢谢答案和努力的家伙！

新手陷入jQuery警报，无法在浏览器中提示通知

问题描述

2 个解决方案

解决方案1
0 2016-11-03 14:29:03

解决方案2
0 2016-11-03 14:42:38

新手陷入jQuery警报，无法在浏览器中提示通知

问题描述

2 个解决方案

解决方案1 0 2016-11-03 14:29:03

解决方案2 0 2016-11-03 14:42:38

解决方案1
0 2016-11-03 14:29:03

解决方案2
0 2016-11-03 14:42:38