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Aug 28, 2018 · The code you are showing introduces an asynchronous primitive, Promise, which can be passed around and used to access a resource that hasn't been populated yet. In this case, you want an Image that is fully loaded and has image data that you can use.
Jan 20, 2022 · Loading images using fetch and promises. If you use fetch to load images you may want to show them on the page or use them in other applications. const loadImage = async (url) => { return ( fetch(url) // Extract as a blob. .then((resp) => resp.blob()) .then((blob) => { return URL.createObjectURL(blob); }) ); };
May 14, 2023 · The solution I found leverages JavaScript Promises and the Image object to pre-load the image before displaying it. If the image loads successfully, the function resolves with the URL, which can be used as the src for the img tag.
Dec 3, 2019 · Promise .all([ loadImage(images.menu), loadImage(images.map) ]) .then(function(){ console.log('menu:', images.menu.status); console.log('map :', images.map.status); }); When all the promises end, will call the function that you pass as a then() callback.
Sep 10, 2015 · Preloading images in parallel with promises can significantly improve the performance of a website. It allows multiple images to be loaded at the same time, reducing the overall load time...
Here are five examples of loading an image on a web browser using the Promise() constructor in JavaScript, along with step-by-step explanations:
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Here is how to use a Promise: myPromise.then(. function(value) { /* code if successful */ }, function(error) { /* code if some error */ } ); Promise.then () takes two arguments, a callback for success and another for failure. Both are optional, so you can add a callback for success or failure only.
