Decode Animated WebP using Javascript (React / NextJS) - javascript

I'm trying to decode animated WebP images.
I'd like to extract the frames composing the animation as well as the delay for each frame.
Any idea of how to deal with decoding animated WebP images using JavaScript in a React / NextJS environment?
I've found node-webpmux (https://github.com/ApeironTsuka/node-webpmux), which is webpmux (https://developers.google.com/speed/webp/docs/webpmux?hl=es-419) for JavaScript. However, it's incompatible as it first tries to use the FS and crashes on Browsers, being incompatible with React / NextJS.

Related

Reduce React-Native image asset size

I am working on an application where I have lot of images and icons(all png), I found out that the image folder's total size is close to 15MB, which is too much, as I am new to react-native so not sure how this size is impacting the total app size and also I am not sure about the best way to reduce this folder size(i.e., images/icons), should I use svg or any other format for this or is there any other way(i.e., compressing the image/icon size etc.)?
I can see that we can't able to use svg directly, we need to use some library and I don't want to burden my app with any libraries as it's already quite heavy
Thanks and looking for the best solution
You have three options to minimize your image assets bundle size.
Using an image URL - instead of storing images on your app. You can upload images to a server and refer the link to App. some image provider servers.
Cloudinary
Firebase Storage
Using SVG - you said that you don't want to include any libraries check the bundle size of react-native-svg it's a pretty lightweight package.
Use any image compressor - compress your image and use it. you can use
TinyJPG
Compress all images at build time using react-native-imagemin-asset-plugin

How to reduce PDF file size using javascript/react?

I am working on a website using reactjs and i want to compress the PDF files which are more than 5MB size. I have tried on Windows 10/ Chrome/Firefox. Is there any way we can reduce the size of PDF using javascript or any React library?

Reduce Loading Time of 0.chunk.js in React App

I am creating a react app. There is a js file 0.chunk.js having size around 1.5 MB, and it takes over 30s to load which delayed my app to load.
I want to know how can i reduce the loading time?
I am using jsPDF and html2canvas to generate some pdf and it seems it increasing the size of chunk i-e 1.5MB. I am already using Webpack. I have also created a seperate component for pdf generation.
Is there any way i can reduce more the chunk size?
Use React Router concept and by setting the conditional import statement you can prevent unwanted loading of files. It will be loaded only when we need

nodejs creating wafeform from mp3 in svg

i'm making a research for the topic of getting a mp3 file rendered as waveform. i've already found some php libraries. now i'm looking for a similar solution in nodejs.
my results so far are:
https://github.com/afreiday/php-waveform-svg
http://www.schillmania.com/projects/soundmanager2/ (maybe loading this in nodejs to try rendering the wave file in svg-format... not quiet sure)
have you guys experience with nodejs-libraries to create waveforms in svg format?
Not a directly nodejs-related solution.
We use a Linux commandline tool Sonic Annotator to extract waveform (peaks) and detect beat in audio files. Its a host that can run VAMP plugins that are quite good at these tasks.
Peaks are extracted as a set of floats from 0 to 1 at equal intervals. SHould be rather simple to build an svg on top of that data (with D3 i.e.).
I'm not used to nodejs, but the docs says it can run external commands.

Web app lag on android

I'm developing a web app with HTML5, css3 and backbone.js and expected lag issues on android mobiles, however my guess is the css causes all the lags, the app would run smoothly without any css. My question is: Is there anyway that can effectivly reduce lag on android by reducing css or other ways?
yes! You can uglify and minify CSS and slightly reduce the size of the file.
But more importantly, how many different CSS and JS files are you calling in your HTML file? Each CSS is a separate HTTP request and definitely slows down the page loading time. Generally you take the number of milliseconds that it takes to load on a desktop and multiply that by 10 for a fast mobile device. Look at the network tab of the Inspector in Chrome (there are similar features in Firefox and safari) and see what the added load of those extra css files are.
How do you reduce the number? By using SASS. Sass is a preprocessor framework for CSS that condenses all your CSS down to one file elegantly. I recommend using an app called Prepros to handle SASS rendering, more information is available on the Prepros and SASS officialy websites.
How many images are you loading? Using services like Tiny Png can reduce the size of the images without losing any visible quality, mobile devices have less ram and are forced to do compression on the front-end.
You can also use the minified backbone.js file, and minify any js you have yourself. this can be done again with Prepros (and the paid mac app Codekit) or you can use any number of online services.
Basically: You need to compress the size of the files you are using, reduce the number of requests for files, and finally keep working to optimize your own javascript to make it as fast as possible. The next step after that is to start simplifying your app and getting rid of features that aren't needed and focus on the core parts that make it useful and elegant.

Categories

Resources