basic-imageloader

 

basic-imageloader requires support for Promise to run. It does not come with a polyfill, supply your own if you want to support legacy environments!  

Arguments

• {string | Array} url(s) to load
• {boolean} strict mode

Usage

Takes an image URL or an array of URLs and returns a Promise that resolves when the images are loaded

BasicImageloader(['image.jpg', 'image2.jpg']).then(() = > console.log('all images loaded!'));

The Promise resolves to the loaded image or an array of the loaded images, so you can work with them afterwards (see Strict Mode for caveats)

BasicImageloader('image1.jpg').then(image =>
  image.height > image.width
    ? enablePortaitMode()
    : enableLandscapeMode();
);
// or with arrays
BasicImageloader(['img1.jpg', 'img2.jpg']).then(images => {
  for (let image of images) {
    console.log(image.width);
  }
});

And since these are Promises, you can of course also use async/await! :)

async function loadAndLogImage(img) {
  const loadedImage = await BasicImageloader(img);
  console.log(loadedImage);
}

Strict Mode

The function takes a boolean as second argument, which enables or disables strict mode for error handling. By default this is off, which means the Promise will resolve no matter what and if you are loading multiple images and one fails, it will still wait for the others to load before resolving.

Careful! In this case, you can't rely on the array the Promise resolves to to only contain images - it will also contain error events where images failed to load!

If you pass true as second argument the Promise immediately rejects if an image fails to load - even if other images are still loading. This way you can implement your own error handling and safely assume that the resulting array only contains valid images.