I\'m trying to add jquery functionality to a desktop app written in electron
Using the electron-quick-start repo i\'m adding the downloaded jquery file to the main.html
When you call require inside index.js, or the main process, it's looking for the node module. So you'll need to install jQuery via npm and save it as a dependency in your apps package.json file.
npm install jquery --save
Then your index.js should theoretically see it just fine using
let $ = require('jquery');
mainWindow.$ = $;
Refer to the Node.JS section for installing jQuery. This is what Electron uses.
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OLD ANSWER
Inside your main.html, just include the JavaScript like you would any traditional JS file.