Is a PhD visitor considered as a visiting scholar? Here is an example of a body tag that uses auto-execution to call a function code containing an alert box: In both examples, onLoad of body tag and window.onload have the same functionality to execute the statements after completing page load. " addEventListener("load", (event) => {}); onload = (event) => {}; Event type A generic Event. a web page has completely loaded all content (including images, script files, Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. src = 'my.jpg'; The browser starts loading the image and remembers it in the cache. The JavaScript Tutorial website helps you learn JavaScript programming from scratch quickly and effectively. Defer is best except that its not supportrd by old browsers. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. The notable exception is sending analytics. Enable JavaScript to view data. Find centralized, trusted content and collaborate around the technologies you use most. The onload event can also be used to deal with cookies (see "More Examples" If this feature is set, the new window will not have access to the originating window via Window.opener and returns null. Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? To learn more, see our tips on writing great answers. If you want to ensure that the component itself is mounted to the DOM, you can use mounted Vue lifecycle. window.location.host returns both the host name and any associated port. Most of the entries in the NAME column of the output from lsof +D /tmp do not begin with /tmp. Images and other resources may also still continue loading. Is a collection of years plural or singular? You are trying to call onload rather than assign an event handler. The purpose of the event.preventDefault() in the code is to cancel the default action of the link: if the event listener for click is executed, then there is no need to execute the default action of the link. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. A global variable, window, representing the window in which the script is running, is exposed to JavaScript code. A WindowProxy object. Heres a document with