![]() Adding content from within the mobile app may be less intuitive than it should be to new users. To create a note on the go, navigate to the notebook you want to work in, then click the oversized plus-sign ( +) button at the bottom of the screen. Storing email permanently in a webmail folder or within Outlook is usually fine, but it means you have to have access to your inbox in order to read it. Background pages have been a fundamental component of the Chrome Extension platform since its introduction. To put it simply, background pages provide extension authors with an environment that lives independent of any other window or tab. This allows extensions to observe and take action in response to events. In Manifest V3, the Chrome extension platform moves from background pages to service workers. As stated in Service Workers: an Introduction, a "service worker is a script that your browser runs in the background, separate from a web page, opening the door to features that don't need a web page or user interaction." This is the technology that enables native-like experiences such as push notifications, rich offline support, background sync, and "Add to Home Screen" on the open web. Service workers were inspired in part by background pages in Chrome Extensions, but they iterate and improve on this model by tuning it for web-scale. When migrating to this new background context, you'll need to keep two main things in mind. Second, service workers don't have access to DOM.įirst, service workers are terminated when not in use and restarted when needed (similar to event pages). We'll explore how to adapt to these challenges in the Thinking with Events and Working with Workers sections below, respectively. # Update your manifestĮxtensions register their background service workers in the manifest under the "background" field. This field uses the "service_worker" key, which specifies a single JavaScript file. In Manifest V2, this field was called "scripts" and allowed multiple scripts.
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