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https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent/CustomEvent
Syntax event = new CustomEvent(typeArg, customEventInit); Parameters typeArg A DOMString representing the name of the event. customEventInit Optional A CustomEventInit dictionary, having the following fields: "detail", optional and defaulting to null, of type any, that is an event-dependent value associated with the event.
https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent
The detail attribute of your CustomEvent will be subjected to the same restrictions. String and Array values will be readable by the content without restrictions, but custom Object will not. While using a custom object, you will need to define the attributes of that object that are readable from the content script using Components.utils ...
https://gomakethings.com/custom-events-with-vanilla-javascript/
Custom Events with Vanilla JavaScript For a few years now, I’ve made it a habit of including callbacks in my open source JavaScript plugins. If you’re unfamiliar with a callback, it’s a piece of code that runs before or (more typically) after your core code.
https://www.sitepoint.com/javascript-custom-events/
Jul 10, 2012 · How to Create Custom Events in JavaScript JavaScript event handling is the basis of all client-side applications. When an event occurs on a target element, e.g. …
https://davidwalsh.name/customevent
May 28, 2012 · Creating custom events and triggering them have always been trickier. Using JavaScript's CustomEvent API, that trickery can be eliminated. The CustomEvent API allows developers to not only create custom events but trigger them on DOM nodes, passing data along the way. Best of all, the API is super simple! The JavaScript
https://javascript.info/dispatch-events
We should use addEventListener for our custom events, because on<event> only exists for built-in events, document.onhello doesn’t work. Must set bubbles:true, otherwise the event won’t bubble up. The bubbling mechanics is the same for built-in (click) and custom (hello) events. There are also capturing and bubbling stages.
https://www.cssscript.com/beautiful-pure-javascript-date-picker-with-events-support-datepickk-js/
Aug 14, 2018 · Datepickk.js is a JavaScript library which allows you select a date or date range from a date picker popup or inline calendar, with support for custom events. How to use it: Include the stylesheet datepickk.min.css and JavaScript file datepickk.min.js on the webpage.
Nov 04, 2019 · "Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers. The site was built and is maintained by Alexis Deveria, with occasional updates provided by the web development community. The design used as of 2014 was largely created by Lennart Schoors. FAQ
https://www.kirupa.com/html5/custom_events_js.htm
That is what makes the built-in events so useful. That is what will make custom events we create (and fire) useful as well. To take advantage of this usefulness, JavaScript provides us with just what we need. We have the appropriately named CustomEvent that does all sorts of awesome things, and in this short article, we'll take a detailed look ...
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