is-progressive alternatives and similar modules
Based on the "Image" category.
Alternatively, view is-progressive alternatives based on common mentions on social networks and blogs.
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sharp
High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP, AVIF and TIFF images. Uses the libvips library. -
jimp
An image processing library written entirely in JavaScript for Node, with zero external or native dependencies. -
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probe-image-size
Get image size without full download. Supported image types: JPG, GIF, PNG, WebP, BMP, TIFF, SVG, PSD, ICO. -
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README
is-progressive 
Check if JPEG images are progressive
Can be useful to make sure your images are progressive, which is important for performance:
Progressive JPEGs are better because they are faster. Appearing faster is being faster, and perceived speed is more important that actual speed. - Progressive JPEGs: a new best practice
The check is fast as it only reads a small part of the file.
Install
$ npm install is-progressive
Usage
const isProgressive = require('is-progressive');
(async () => {
console.log(await isProgressive.file('baseline.jpg'));
//=> false
})();
isProgressive.fileSync('progressive.jpg');
//=> true
// Check if a remote JPEG image is progressive without downloading the whole file
const https = require('https');
const isProgressive = require('is-progressive');
const url = 'https://raw.githubusercontent.com/sindresorhus/is-progressive/master/fixture/progressive.jpg';
https.get(url, async response => {
console.log(await isProgressive.stream(response));
//=> true
});
API
Prefer the file methods if you're dealing directly with files. Those methods are optimized to read in the least amount of bytes necessary to determine whether it's a progressive JPEG image.
.buffer(buffer)
Returns whether the buffer is a progressive JPEG image.
buffer
Type: Buffer
Buffer of a JPEG image.
Must be at least 65535 bytes when the file is larger than that.
.stream(stream)
Returns a Promise<boolean> indicating whether the file stream is a progressive JPEG image.
stream
Type: stream.Readable
Data stream with a JPEG image.
.file(filePath)
Returns a Promise<boolean> indicating whether the file at the filePath is a progressive JPEG image.
filePath
Type: string
File path to the image.
.fileSync(filePath)
Whether the the file at the filePath is a progressive JPEG.
filePath
Type: string
File path to the image.
Build-system integration
Don't use this with a build-system like Gulp/Grunt as you can easily make the images progressive with the imagemin (Gulp/Grunt-task) progressive option instead of just warning about it.
Related
- is-progressive-cli - CLI for this module