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José Manuel Pérez
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José Manuel Pérez

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If you are building universal apps, a couple of things here might be handy: https://jmperezperez.com/data-fetching-universal-apps/
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José Manuel Pérez

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Contour - Drawing edges from bitmap images using SVG https://jmperezperez.com/drawing-edges-svg/ 
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Some quick notes from this year's Fronteers conference https://jmperezperez.com/fronteers-2015/ 
Fronteers 2015 - Some notes about the conference in Amsterdam.
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I just wrote a small example based on Joe Sullivan's post on detecting beats of a song  http://tech.beatport.com/2014/web-audio/beat-detection-using-web-audio/ . Check it out on http://jmperezperez.com/bpm-detection-javascript/ And, of course, it works on mobile.
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Very interesting to read!
 
On Mobile, Data URIs are 6x Slower than Source Linking (New Research) http://www.mobify.com/blog/data-uris-are-slow-on-mobile/
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It's Friday! Celebrate it singing! Karaoke-filter using Web Audio API http://jmperez.github.io/karaoke  #petproject
Do you like Karaoke? Find a music file and drag it here. If you are lucky, you will listen the song without vocals. Drop your MP3 file here (also .ogg or .wav). Or select a file: Options: Disable karaoke. How it works. By using the Web Audio API, the file is processed and voice is removed.
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José Manuel Pérez

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SVG shows again what it is capable of. https://jmperezperez.com/duotone-using-fecolormatrix/
Using feColorMatrix SVG filters to apply a duotone effect to an image.
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A post about a nice image loading technique seen on Medium https://jmperezperez.com/medium-image-progressive-loading-placeholder/
This post explains how Medium renders an image placeholder using low-res thumbnails and canvas
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On content blockers are how web developers should embrace progressive enhancement http://jmperezperez.com/ios-ads-blockers 
Some opinions on ads and content blockers and how they affect web development.
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José Manuel Pérez

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Spotify's 5th anniversary
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