未捕获错误：找不到模块'jquery' [英] Uncaught Error: Cannot find module 'jquery'
问题描述
我使用
即它有以下部分：
- main.js
- package.json
- nodemodules> jquery（加载jquery）
源代码：
main.js：
'use strict';
var app = require（'app'）;
app.on（'ready'，function（）{
var BrowserWindow = require（'browser-window'）;
var win =
new BrowserWindow（{width：800，height：600，show：false，
'node-integration'：true}）;
win.on（'closed'，function（）{
win = null;
}）;
win.loadUrl（'http：//mydummysite/index.html'）;
win.show（）;
}）;
package.json：
{
name：my-mac-app，
version：5.2.0，
description：我的Mac桌面App，
main：main.js，
scripts：{
start：electron。
}，
作者：我，
许可证：ISC，
依赖：{
jquery：^ 2.1 .4
}
}
外部页面 -
你能帮我找到吗？这个问题的原因？
正如你在我的目录结构截图中看到的，我已经将jquery模块安装到我的文件夹中，我通过npm install jquery命令完成了。
注意：要在JS中使用require命令，我尝试在我的外部页面中添加require（ipc）
有人可以建议为什么要求（ ipc）工作，并要求（jquery）不？
我的目标是将jQuery与电子应用结合使用，节点集成为真。
tl; dr
与普通的nodejs应用程序相比，您可以访问全局模块（例如，位于 / usr / bin / node ），电子不会自动设置 NODE_PATH 环境变量。您必须手动将其设置为包含所需模块的所有路径。
更新：
问题的答案
为什么
require（ipc）正在运行，require（jquery）不是吗？
可在此问题中找到，说明系统/用户模块应该不包含在模块的全局路径中
因为它们可能包含应用程序未附带的模块，并且可能使用错误的v8标头编译。
如果你看一下电子源你可以看到内部模块被添加到 module.globalPaths ：
＃将common / api / lib添加到模块搜索模式HS。
globalPaths.push path.resolve（__ dirname，'..'，'api'，'lib'）
这就是为什么你可以访问 ipc ， app 等等但不是你拥有的模块使用全局安装npm install -g 。
我只是尝试了最新的 电子预建 本地服务器的版本与您提供的HTML文件完全相同，我想我知道问题所在：如果您没有将路径附加到您的应用程序 node_modules 你的应用程序根目录下的目录到 NODE_PATH 变量它不会起作用。所以你需要做这样的事情：
export NODE_PATH = / PATH / TO / APP / node_modules
electron / PATH / TO / APP
导出 NODE_PATH 确保你提供绝对路径。
更新2：
评论的答案：
我发现jQuery未找到错误
可在此票据中找到。基本上，如果您使用jQuery的npm包或在电子内部的HTML文件中执行以下操作：
< script src = https://code.jquery.com/jquery-2.1.4.min.js\"></script>
你得到的是 factory 而不是附加到的实际jQuery对象全局上下文（例如窗口）。正如我在之前的回答（也包含jQuery的源代码）中提到的那样
当您在CommonJS或类似环境中需要jQuery时，它提供
模块和module.exports，你得到的是工厂而不是实际的jQuery对象。
现在使用那个工厂（通过导入来自CDN的代码或者如果你有本地可用的npm模块）你将需要如下内容：
<脚本>
window.jQuery = window。$ = require（'jquery'）;
< / script>
我写了文章解释了Node + jQuery的组合。
I am using Electron to make a desktop app. In my app I am loading a an external site (outside Atom app) lets say http://mydummysite/index.html page.
Here is the structure of my app in Atom Editor:
i.e it is having following parts:
- main.js
- package.json
- nodemodules>jquery (to load jquery)
Source code:
main.js:
'use strict';
var app = require('app');
app.on('ready', function() {
var BrowserWindow = require('browser-window');
var win =
new BrowserWindow({ width: 800, height: 600, show: false,
'node-integration':true });
win.on('closed', function() {
win = null;
});
win.loadUrl('http://mydummysite/index.html ');
win.show();
});
package.json:
{
"name": "my-mac-app",
"version": "5.2.0",
"description": "My Mac Desktop App",
"main": "main.js",
"scripts": {
"start": "electron ."
},
"author": "Me",
"license": "ISC",
"dependencies": {
"jquery": "^2.1.4"
}
}
External page - http://mydummysite/index.html page code:
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<h1>Hello World!</h1>
</body>
<script>
var jqr=require('jquery');
</script>
</html>
When I run the above app (by dragging the application folder to Electron) the external page (http://mydummysite/index.html) loads in Electron shell but with the error "Uncaught Error: Cannot find module 'jquery'"
Can you help me finding the cause of this issue?
As you can see in my screenshot of directory structure I have alread installed jquery module to my folder and I did it via "npm install jquery" command.
Note: To play with "require" command in JS I tried adding "require("ipc")" in my external page http://mydummysite/index.html page and it was working so what could be the reason with require("jquery").
Did I add external module (jquery) in correct way in Electron?
Am I missing some dependency in package.json?
What I have already tried:
- npm cache clean, npm install jquery (to my app folder)
- npm install --save jquery
- npm install jquery -g
- npm rebuild
- sudo npm install jquery -g
- sudo npm install jquery
- export NODE_PATH=/usr/local/lib/node_modules
Here is the screenshot of the location from where the error is thrown in module.js
Can someone suggest why require("ipc") is working and require("jquery") not?
My goal is to use jQuery with electron app with node-integration true.
tl;dr
In contrast to a normal nodejs app, where you have access to global modules (e.g. located in /usr/bin/node), electron doesn't automatically set the NODE_PATH environment variables. You have to set it manually to all the paths containing your desired modules.
Update:
The answer to the question
why
require("ipc")is working andrequire("jquery")not?
is to be found in this issue, stating that system/user modules should not be included in the global path of the module
since they could contain modules not shipped with the app and possibly compiled with the wrong v8 headers.
And if you take a look at electron's source you can see that internal modules are added to the module.globalPaths:
# Add common/api/lib to module search paths.
globalPaths.push path.resolve(__dirname, '..', 'api', 'lib')
thats why you have access to ipc, app, etc. but not the modules that you have installed globally using npm install -g.
I just tried it out with the latest electron-prebuilt version with a local server serving exactly the same HTML file that you provided and I think I know what the problem is: If you don't append the path to your app node_modules directory under your app root to the NODE_PATH variable it is not going to work. So you need to do something like this:
export NODE_PATH=/PATH/TO/APP/node_modules
electron /PATH/TO/APP
When exporting NODE_PATH make sure that you provide an absolute path.
Update 2:
The answer to the comment:
I get jQuery not found errors
Is to be found in this ticket. Basically if you use the jQuery's npm package or do something like the following in your HTML files inside electron:
<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
What you get is a factory and not the actual jQuery object attached to the global context (e.g window). As I mentioned in a previous answer (containing also jQuery's source code)
When you require jQuery inside a CommonJS or similar environment which provides
moduleandmodule.exports, what you get is a factory and not the actual jQuery object.
Now to use that factory (either by importing the code from the CDN or if you have the npm module available locally) you would need something as the following:
<script>
window.jQuery = window.$ = require('jquery');
</script>
I have written an article that explains the combination of Node + jQuery.
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