Browser feature detection in code base - Am I using ...? [closed] - javascript

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http://caniuse.com/ is a very helpful tool to figure out which browsers/versions support a specific CSS, HTML, JS feature. What about a tool that parses my code and tells me what features I'm actually using? If you have a large codebase, finding out post-hoc which features you're actually using can be very tedious if done manually. How would you go about that?
I'm not asking for feature detection at runtime, I know Modernizr but what I need is the exact opposite of that. A solution to find out which tests I need to add to the Modernizr config.

Modernizr might still help you to get there although you would use it in a different way. You could configure it to detect all features and run that in the set of browsers that your project needs to support. Then do something like
if ( ! Modernizr.flexbox ) {
elem.matchHeight();
}
for all of the features and you'll quickly find out which features your codebase is using.

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Best Java Script Plugin for Image compression with many browsers support [closed]

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Can someone suggest a best Java Script Plugin for Image compression with many browsers support?
I searched and find many and not sure about the drawbacks and advantages of using it.
If someone already uses it, please suggest.
Thanks.
Write you own code with HTML5 Canvas, file and Blob Url.
All this code will take half of screen). If you working with very large images, e.g. 6000x9000 for better quality you should use this lib
https://github.com/nodeca/pica instead of canvas.
This is most powerful lib that i know at js. Lib with several resize algorithms for people who knnow the difference.

Is there some SVG processor? [closed]

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I am searching for a cross-browser client-side library to build SVG a similar way SASS/LESS/SCSS build CSS.
Do you know something like that?
There is SnapSVG. It is not a preprocessor but Snap.svg is designed for modern browsers and therefore supports the newest SVG features like masking, clipping, patterns, full gradients, groups, and more.
http://snapsvg.io/
SnapSVG Demos:
http://snapsvg.io/demos/
Getting Started with SnapSVG:
http://snapsvg.io/start/
SnapSVG Docs:
http://snapsvg.io/docs/
You're looking for a solution for generating SVGs on the server. Frankly there doesn't seem to be much out there for you.
I did a bit of googling, and the best I came up with was this article which describes using PhantomJS to run the standard client-side libraries on the server. It's not the answer you're looking for, but it's the best I've been able to find.

what client side javascript cache library would you recommend? [closed]

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I'm looking for a client-side javascript cache library
Ideally, this is the feature list I'd like to have
no dependencies
simple
time expiration support
use localStorage if available, and fallback to array
actively developed
I've found a few options, but they don't seem to be particularly active
Related questions at SO are a bit ancient too...
https://github.com/monsur/jscache (this is the most promising one)
http://www.dustindiaz.com/javascript-cache-provider
What JavaScript cache can you recommend
http://sourceforge.net/projects/jsoc/
https://github.com/jeromeetienne/MicroCache.js/blob/master/microcache.js
we made a library for Javascript.
no dependencies
simple
time expiration support
use localStorage and sessionStorage
and it has more features.
you can look from here
https://github.com/giraysam/boomerang-cache
i just made simple js lib for caching. It support array and localStorage
https://github.com/hoangnd25/cacheJS

Looking for Javascript Typed Arrays emulation library [closed]

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I'm searching for a library that allows to emulate Typed Arrays in older JS engines.
At the very least, I would like to support IE8 (because of WinXP) and Android 2.x (because of fragmentation of Android devices which wont likely to get upgraded)
Yes, performance would be an issue, but, as it said, "make it work, then make it work fast.."
Single codebase is more important to me right now.
I believe this is what you're looking for: http://www.calormen.com/polyfill/typedarray.js
It's a polyfill made by Linden Research. I found it via this page. It's quite old, though (2010).

What JavaScript library can you recommend? [closed]

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I want to use JavaScript on my web page. In particular I would like to have a auto-completer (like stackoverflow use for tags). I also would like to have drop down menus and so on.
I think, for these purposes it make sense to use a JavaScript library (I never did it before). I browsed Internet the first option that I found was jQuery, I also found a list of other libraries.
So, I have a hard time choosing between these libraries and would like to ask your advise. My requirements to the library as as follow:
Of course cross-browser functionality (works on as many browsers as possible).
Easy to use (good documentation with examples + active community).
Possibility to change the code (corresponding copy right + good documentation of the code).
Thank you in advance for any help.
Go for jquery and jquery UI which contains a nice autocomplete plugin. It's a javascript framework which gathered lots of pace, there's an enormous community and it is very likely you will find a plugin for every needs. It is guaranteed to work cross browser and you get a great documentation.

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