pica VS compressorjs

Then pica to resize it and a simple function I wrote to crop it:

Take a look at pica (Resize images in browser without pixelation and reasonably fast. Autoselect the best of available technologies: webworkers, webassembly, createImageBitmap, pure JS.)

You can use the pica library for browser resizing - https://www.npmjs.com/package/pica - it's a really great tool. It can also reduce upload size for large images. And some library like this for merging images - https://www.npmjs.com/package/merge-images.

Pica : resize image in browser with high quality and high speed.

I want to use this in my TamperMonkey script: https://github.com/nodeca/pica

this sounds promising, though I've never used it before https://github.com/nodeca/pica

Sample text here... Syntax highlighting js var foo = function (bar) { return bar++; }; console.log(foo(5)); ## Tables | Option | Description | | ------ | ----------- | | data | path to data files to supply the data that will be passed into templates. | | engine | engine to be used for processing templates. Handlebars is the default. | | ext | extension to be used for dest files. | Right aligned columns | Option | Description | | ------:| -----------:| | data | path to data files to supply the data that will be passed into templates. | | engine | engine to be used for processing templates. Handlebars is the default. | | ext | extension to be used for dest files. | ## Links link text link with title Autoconverted link https://github.com/nodeca/pica (enable linkify to see) ## Images Like links, Images also have a footnote style syntax ![Alt text][id] With a reference later in the document defining the URL location: [id]: https://octodex.github.com/images/dojocat.jpg "The Dojocat" ## Plugins The killer feature of markdown-it is very effective support of syntax plugins. ### Emojies > Classic markup: 😉 :crush: 😢 :tear: 😆 😋 > > Shortcuts (emoticons): :-) :-( 8-) ;) see how to change output with twemoji. ### Subscript / Superscript - 19^th^ - H~2~O ### ++Inserted text++ ### ==Marked text== ### Footnotes Footnote 1 link[^first]. Footnote 2 link[^second]. Inline footnote^[Text of inline footnote] definition. Duplicated footnote reference[^second]. [^first]: Footnote can have markup and multiple paragraphs. [^second]: Footnote text. ### Definition lists Term 1 : Definition 1 with lazy continuation. Term 2 with inline markup : Definition 2 { some code, part of Definition 2 } Third paragraph of definition 2. Compact style: Term 1 ~ Definition 1 Term 2 ~ Definition 2a ~ Definition 2b ### Abbreviations This is HTML abbreviation example. It converts "HTML", but keep intact partial entries like "xxxHTMLyyy" and so on. [HTML]: Hyper Text Markup Language ### Custom containers ::: warning *here be dragons :::

this is a sort of similar one https://github.com/nodeca/pica (i found it hard to use with create-react-app tho had to skip over its use of webworkers, tho that would be cool to use, code to use pica here https://github.com/cmdcolin/aws\_serverless\_photo\_gallery/blob/master/frontend/src/App.tsx#L20-L25)

link with title

After researching a couple of different options, what I landed on was a package called compressorjs written by Chen Fengyuan. This library performs compression and resizing of images in the browser. I was a bit skeptical at first, but it's a cool project and has good browser support. How Compressorjs works is that it uses the HTML5 canvas element to read the original image data and perform lossy transformations to compress and resize the image. There's a whole bunch of transformation options. For my project, what I have found is simply changing the maximum width of the image to 600px and slightly reducing the quality has greatly reduced the file sizes.

You can change image quality or pass different options. I set customized mimeType and width by passing option parameter here. You can find more usages from compressor.js original documentation.

I will use compressorjs, a tiny librarie (3.8 kB minzipped). Compressor.js uses the Browser's native HTMLCanvasElement.toBlob() API to do the compression work, which means it is lossy compression.

(I checked out : imagemin, compress.js, compressorjs and some small others)

Django CK editor comes with default image shrinker based on Pillow, But Pillow sucks at image shrinking, A frontend library called compressorjs does 5 times the Image quality with 5 times smaller the size.

MORE INFO

You don't actually need any web services. Just import the compressorjs library and the UPNG.js library on client side(frontend) and then before uploading the data to server compress the image. These libraries were actually written for frontend compression by their respective owners. https://github.com/photopea/UPNG.js (25kb) https://github.com/fengyuanchen/compressorjs (8kb)