Learn about the pageswap event, including its type, syntax, and properties, code examples, specifications, and browser compatibility.... js addEventListener("pageswap",...case, it returns null . Examples js window.addEventListener("pageswap"...
A Proxy Auto-Configuration file (PAC file) is a file which contains a function, FindProxyForURL(), which is used by the browser to determine whether requests (including HTTP, HTTPS, and FTP) should go directly to the destination or if they need to be forwarded through a web proxy server.... js function FindProxyForURL(url...
Learn about the WebGLSampler interface, including code examples, specifications, and browser compatibility.... js const sampler = gl.createSampler();...
At this point, you should have a good idea of what APIs are, how they work, and what you can do with them in your JavaScript code. You are probably excited to start actually doing some fun things with specific APIs, so let's go! Next up, we'll look at manipulating documents with the Document Object Model (DOM)....which to manipulate our track: js const audioCtx = new AudioContext();...element will be played from: js const audioElement = document...
An important aspect of custom elements is encapsulation, because a custom element, by definition, is a piece of reusable functionality: it might be dropped into any web page and be expected to work. So it's important that code running in the page should not be able to accidentally break a custom element by modifying its internal implementation. Shadow DOM enables you to attach a DOM tree to an element, and have the internals of this tree hidden from JavaScript and CSS running in the page....add a single <span> element: js const host = document.querySelector("#host");...the page, so you can try again. js const host = document.querySelector("#host");...
Learn about the BeforeInstallPromptEvent interface, including its constructor, properties, and methods, code examples and browser compatibility.... js let installPrompt = null; const...variable and hiding itself again. js installButton.addEventListener("click"...
Learn about the beforematch event, including its type and syntax, code examples, specifications, and browser compatibility.... js addEventListener("beforematch"...scroll-margin-top: 200px; } JavaScript js const untilFound = document....
Learn about the drop event, including its type, syntax, and properties, code examples, specifications, and browser compatibility.... js addEventListener("drop", (event)...10px; padding: 10px; } JavaScript js let dragged = null; const source...
JavaScript has a runtime model based on an event loop, which is responsible for executing the code, collecting and processing events, and executing queued sub-tasks. This model is quite different from models in other languages like C and Java.... js function foo(b) { const a = 10;...implemented, which usually resembles: js while (queue.waitForMessage())...