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window.onload just runs when the browser gets to it. window.addEventListener waits for the window to be loaded before running it. In general you should do the second, but you should attach an event listener to it instead of defining the function. For example: window.addEventListener('load', function() {.
The onload event can be used to check the visitor's browser type and browser version, and load the proper version of the web page based on the information. The onload event can also be used to deal with cookies (see "More Examples" below).
26 lip 2024 · Examples. Log a message when the page is fully loaded: js. window.addEventListener("load", (event) => { . console.log("page is fully loaded"); }); The same, but using the onload event handler property: js. window.onload = (event) => { . console.log("page is fully loaded"); }; Live example. HTML. html.
The load event occurs when the document has been completely loaded, including dependent resources like JavaScript files, CSS files, and images. The <img> and <script> elements also support the load event. Use the addEventListener() method to register an onload event handler.
The onload attribute fires when an object has been loaded. onload is most often used within the <body> element to execute a script once a web page has completely loaded all content (including images, script files, CSS files, etc.).
14 paź 2022 · window.onload. The load event on the window object triggers when the whole page is loaded including styles, images and other resources. This event is available via the onload property. The example below correctly shows image sizes, because window.onload waits for all images:
2 lut 2024 · This article explains the purpose of the window.onload method in JavaScript by an example. The window.onload function executes to perform a task once the page on the browser finishes loading.
