compressorjs
fabric.js
compressorjs | fabric.js | |
---|---|---|
8 | 49 | |
4,976 | 27,512 | |
- | 0.9% | |
2.1 | 9.3 | |
12 months ago | 4 days ago | |
JavaScript | JavaScript | |
MIT License | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
compressorjs
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Client-side image compression with Supabase Storage
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.
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One Click to Optimize Images, Create Repo and Making Commit
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.
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How to compress images on client-side
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.
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Compressing images on client side before upload
(I checked out : imagemin, compress.js, compressorjs and some small others)
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Django CK editor with client side image shrinker
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.
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12 JavaScript Image Manipulation Libraries For Your Next Web App
MORE INFO
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Made a Web App to reduce Image Size by up to 90%, No file Size Limit & Works Offline | compressimage.io
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)
fabric.js
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Fun, Beautiful, Printable 'Story Cards' for Kids with Cloudflare AI
This AI-powered Story Card Maker is built as a SvelteKit application with Typescript. Using Flowbite Svelte component library, the whole application was laid out. The layout for the Story Card (emulating the size of a postcard - 4" x 3") is created as an HTML Canvas using Fabric.js.
- JSON Canvas – An open file format for infinite canvas data
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Step by step on how to setup fabric.js in the next.js app
Fabric.js is a powerful and simple Javascript HTML5 canvas library. It provides an interactive object model on top of the canvas element. Fabric also has SVG-to-canvas (and canvas-to-SVG) parser.
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How I choose Fabric.js again
Based on this, I found that some of the libraries are dead and no longer have any support. Only two libraries are still alive and have significant amount of stars on GitHub and downloads on NPM. They are Fabric.js and Konva.js.
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Building application Like Canva in ReactJS
I'm actually in the process of building something similar. It's a React app and I'm using the FabricJs library
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How can I build a configurator like this ?
I've played with this tech in early 2010s - they are using HTML5 Canvas tech + something like Fabric.js(http://fabricjs.com/) that controls Canvas objects.
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Canvas Element with multiple images that can be moved?
this library might help you: http://fabricjs.com/
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How would I wrap an image on an object in web?
I did some research and the most promising result was using Fabric.js (http://fabricjs.com/) to put images on products. I may not be experienced enough in JS to understand the full capabilities of this library, but it looks like most of their stuff works on flat surfaces. I am trying to replicate the properly wrapped/textured affect that is achieved in the blanket below.
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Any ideas on how to build this floating sidebar and how it functions?
set up a canvas drawing & rendering framework, for example http://fabricjs.com/
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Image Manipulation with Fabric.js and Canvas
body{ display:flex; flex-direction:column; align-items:center; }
Learning Fabric
Enter fullscreen mode Exit fullscreen modeNext, we initiate a Canvas instance in our script tag:
Syntax
new fabric.Canvas(element: HTMLElement|String, options: Object)
Enter fullscreen mode Exit fullscreen modeThis allows Fabric.js to create this class instance so that we can use the provided methods of Fabric.js:
const canvas = new fabric.Canvas("canvas", {})
Enter fullscreen mode Exit fullscreen modeNow, we’ll go ahead and give our canvas different properties, such as width, height, and background color:
const canvas = new fabric.Canvas("canvas", { width:500, height:500, backgroundColor:green })
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Creating a Rectangle with Fabric.js
Now that we’ve initialized a canvas and given it various properties, we’re going to create a rectangle using the Fabric.js object fabric.Rect:
Syntax
new fabric.Rect({object})
Enter fullscreen mode Exit fullscreen modeHere the object houses the rectangle properties:
const canvas = new fabric.Canvas("canvas", { width:500, height:500, backgroundColor:green }); const rectangle = new fabric.Rect({ width:200, height:200, /* fill is used to define the background color*/ fill:'red' }) /*the add method is used to add objects to the canvas element */ canvas.add(rectangle) /*the renderAll method used to render the canvas*/ canvas.renderAll();
Enter fullscreen mode Exit fullscreen modeThe
add()
method is used to add objects to the Canvas element. In this case, it adds the rectangle we created to the canvas:Output
Creating a Circle
In the same way, we’ll create a circle. This time, we’ll use fabric.Circle:
const canvas = new fabric.Canvas("canvas", { width:500, height:500, backgroundColor:"lightgray" }); const circle = new fabric.Circle({ radius:60, fill:"blue" }) canvas.add(circle); canvas.renderALl();
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With the above steps, we created a rectangle and a circle using Fabric.js. Note how interactive the objects are! Next, we’ll discuss images in Fabric.js.
Images with Fabric
The Fabric.Image is a Fabric.js object used to render images on a canvas. With Fabric.js, we can interact with the image. Images can be added to our canvas in two ways:
- Fabric.Image
- Fabric.Image.fromURL
Using the Fabric.Image constructor requires us to create an image element in our HTML and then insert it into the constructor:
Syntax
fabric.Image(image_element)
Enter fullscreen mode Exit fullscreen modeHTML
Enter fullscreen mode Exit fullscreen modeJS
const image_element = document.querySelector('#image'); const image = new fabric.Image(image_element) canvas.add(image); canvas.renderAll();
Enter fullscreen mode Exit fullscreen modeHowever, Fabric.Image.fromURL requires only the image URL (the URL can be retrieved from a website or your local folder), and is simpler than the former:
fabric.Image.fromURL(URL, function());
Enter fullscreen mode Exit fullscreen modeAfter passing the URL, the callback function after the image is loaded. The first default parameter of the callback function is the fabric.Image object. Now, we can modify the image properties and then add it to the canvas:
const canvas = new fabric.Canvas("canvas", { width:500, height:500, backgroundColor:"White" }); fabric.Image.fromURL('my_image.png',(img) => { // the scaleToHeight property is use to set the image height img.scaleToHeight(250) // scaleToWidth is use to set the image width img.scaleToWidth(250) canvas.add(img) }) canvas.renderAll()
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Editing Images with Fabric.js
Now that we know how to insert an image into a canvas, we’ll look at other image objects like image filters.
Image Filters
Fabric.js provides us with built-in filters:
- BaseFilter
- Brightness
- convolute
- GradientTransparency
- Grayscale
- Invert
- Mask
- Noise
- Pixelate
- RemoveWhite
- Sepia
- Sepia2
- Tint
Every instance of
fabric.Image
has the "filters" property, which is a simple array of filters. We can use the array method to perform any required operation, including removing filters (pop, slice, shift), adding filters (push, unshift, slice), and even combining multiple filters. When we callapplyFilters
, any filter in the “filters” array will be applied one by one. Let’s use some of these filters:Syntax
new fabric.Image.filters // after that you can add any filter of your choice // Example new fabric.Image.filters.Grayscale()
Enter fullscreen mode Exit fullscreen modefabric.Image.fromURL('my_image.png', (image) => { image.scaleToHeight(300) image.ScaleToWidth(300) // Creating filter const filter = new fabric.Image.filters.Grayscale() //push the filter instance to filters image.filter.push(filter) // apply filter image.applyFilters() //add image into canvas (it also re-render the canvas) canvas.add(image) },{crossOrigin: 'anonymous'}); canvas.renderAll();
Enter fullscreen mode Exit fullscreen modeOutput
Above, we used the Grayscale filter; we can also apply other filters. All we have to do is simply change the filter, as shown in this example:
fabric.Image.fromURL('my_image.png', (image) => { image.scaleToHeight(300) image.ScaleToWidth(300) // creating filter const filter = new fabric.Image.filters.Sepia() //add filter image.filter.push(filter) // apply filter image.applyFilters() //add image into canvas (it also re-render the canvas) canvas.add(image) },{crossOrigin: 'anonymous'}); canvas.renderAll();
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Image Blending
Blending is mixing two or more images to create a new image. Fabric.js gives us this ability. Here, we’re going to use the image blending filter for our image:
Syntax
new fabric.Image.filters.BlendImage({ // the image that we want to blend image:imageA, // blend mode (in this case we are using the 'add' mode) mode:'add', alpha:0.5 });
Enter fullscreen mode Exit fullscreen modefabric.Image.fromURL('my_image.png', (imageA) => { imageA.scaleToWidth(350) imageA.scaleToHeight(350) canvas.add(imageA) // Blending filter filter = new fabric.Image.filters.BlendImage({ image:imageA, mode:'add', alpha:0.5 }); //Add the second image fabric.Image.fromURL('my_image2.png',(imageB) => { imageB.scaleToHeight(100), imageB.scaleToWidth(100), canvas.add(imageB) }, {crossOrigin:''}); imageA.filters.push(filter); imageA.applyFilters(canvas.renderAll.bind(canvas)); },{crossOrigin:''})
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Image Clipping
A very popular effect used today is image clipping, or rather image cropping, which is done to remove parts of an image that we don’t want. With Fabric.js, we can achieve this by using the
clipPath
method.First, we have to create our own
clipPath
using any Fabric.js object. Then, we’ll assign it to theclipPath
property of the object we want to clip. Here, we’ll use a circle object:
const clipPath = new fabric.Circle({ radius:150, top:200, left:250, // The originY and originX helps to center the image and the clipPath originY:"center", originX:"center" })
Enter fullscreen mode Exit fullscreen modeAfter that, we add it to the image that we want to clip using the filter method:
new fabric.Image.fromURL('my_image.png',(img) => { img.scaleToHeight(300) img.scaleToWidth(300) // positioning the image img.scale(o.5).set({top:50,left:100}) // Clip Path clipPath = new fabric.Circle({ radius:150, top:200, left:250, originY:"center", originX:"center" }) canvas.add(img) canvas.clipPath = clipPath; }); canvas.renderAll();
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Image Blurring
Like other image filters, the blur filter accepts objects because they can be adjusted. A practical example is changing the brightness of an image. You can apply other image filters without any additional configurations (like grayscale, invert, or sepia). Other image filters like brightness, pixelate, tint, and noise all operate in this way, too. However, the difference is that their values are not the same. The brightness filter's actual brightness level ranges from-1 (full black) to 1 (full white). The noise filter's value is between 0 and 1000. For the blur filter, the value ranges from 0 to 10.
Syntax
new fabric.Image.filters.Blur(object)
Enter fullscreen mode Exit fullscreen modefabric.Image.fromURL('my_image.png', (image) => { image.scaleToHeight(300) image.ScaleToWidth(300) // Creating the blur filter const filter = new fabric.Image.filters.Blur({ blur:0.6 }) //push the filter instance to filters image.filter.push(filter) image.applyFilters() canvas.add(image) },{crossOrigin: 'anonymous'}); canvas.renderAll();
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Conclusion
In conclusion, Fabric.js gives us an awesome experience when working with Canvas. It also provides a lot of features, some of which we covered in this article. For full details on some of the Fabric.js objects, you can review its documentation here.
What are some alternatives?
cropperjs - JavaScript image cropper.
paper.js - The Swiss Army Knife of Vector Graphics Scripting – Scriptographer ported to JavaScript and the browser, using HTML5 Canvas. Created by @lehni & @puckey
sharp - High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP, AVIF and TIFF images. Uses the libvips library.
p5.js - p5.js is a client-side JS platform that empowers artists, designers, students, and anyone to learn to code and express themselves creatively on the web. It is based on the core principles of Processing. http://twitter.com/p5xjs —
pica - Resize image in browser with high quality and high speed
three.js - JavaScript 3D Library.
UPNG.js - Fast and advanced PNG (APNG) decoder and encoder (lossy / lossless)
Konva - Konva.js is an HTML5 Canvas JavaScript framework that extends the 2d context by enabling canvas interactivity for desktop and mobile applications.
squoosh - Make images smaller using best-in-class codecs, right in the browser.
d3 - Bring data to life with SVG, Canvas and HTML. :bar_chart::chart_with_upwards_trend::tada:
jimp - An image processing library written entirely in JavaScript for Node, with zero external or native dependencies.
GoJS, a JavaScript Library for HTML Diagrams - JavaScript diagramming library for interactive flowcharts, org charts, design tools, planning tools, visual languages.