/res This directory contains platform specific resources such as launch icons, splash screens, configuration files etc. for the Cordova/PhoneGap project./www This directory contains the project's HTML/CSS/JS assets.config.xml It is a global configuration file that controls the Cordova/PhoneGap app's behavior./assets This directory contains the CSS, JS, images, fonts assets./partials This directory contains the HTML files.browserconfig.xml This XML file, specific to IE/Edge, is used to define pinned site customizations, such as tile backgrounds, badge updates, and tile notifications.index.html This file is the entry point to the app.manifest.json This web app manifest is a simple JSON file that tells the browser about your web application and how it should behave when installed on the user's mobile device or desktop.service-worker.js This file empowers the PWA by enabling offline caching, background sync, push notifications etc.assets directory contains two folders — custom and vendorvendor directory contains the core dependencies, third-party libraries and plugins used in the app.custom directory contains the custom assets such as images used in the app, CSS overrides or app-specific JavaScript functions.vendor directory. If you want to make any changes such as styling then you should override those CSS in custom.css file present inside custom/css directory.