![]() Then, in a for loop, we construct a new button and set the current flag as the background image of the new button. addEventListener ( " click ", handleFlagClick )ĬonstructFlags takes the array of languages (which are incidentally also file prefixes) as an argument and accesses the active language from the local storage. Let language = ' url(flags/english.png) ' Ĭhrome. You can download the flag icons from flaticon. Adding Flag IconsĬreate the flags directory in your project folder, and then download five flag images representing five different languages. We are going to create the background code, but before doing that, we need to create our language flags. service_worker points to our JavaScript Chrome extension's code that will be run whenever our extension is loaded onto the browser. The permissions property is an array of APIs that we want Chrome to grant our extension access to.īackground contains the service worker. Version 1 is deprecated, and version 3 is the latest and recommended version at the time of writing. Chrome has three manifest versions: 1, 2, and 3. The manifest_version property is especially important to Chrome. The name, description, and version attribute all provide the information that will be displayed publicly on our extension when it is loaded to the browser. " description " : " A simple extension for choosing from different language options " , Inside the folder, create the file manifest.json and include the following code in it: The manifest file gives Chrome all the information it needs about your extension.īefore creating a manifest file, create an empty folder for your project-I'll refer to it henceforth as project folder. Creating the Manifest File to Build With Chrome We'll be using a couple of these APIs later on in the tutorial. Now you'll be able to load and test your extension in your browser.Īlso, you can check out the Chrome API reference to learn about the various APIs made available by Chrome for building extensions. To enable developer mode, click on the three dots on the top right of your window, go to More Tools > Extensions, and then toggle on Developer mode at the top right. This feature allows developers to actively test, debug, and preview the extension while it's still in development. Chrome Developer Mode Setup + Chrome Extensions and APIsīefore we start building the extension, we'll need to turn on Developer mode in our Chrome browser. Add more languages to your extensions in Chrome.ġ.Add icons when developing a Chrome extension.Create a popup menu when developing a Chrome extension.Add flag icons when we develop our Chrome extension. ![]() Some of these versions will point to our JavaScript Chrome extension.
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