Why do we not just use Minified JS?

I see开发者_开发技巧 this word alot "minified" and i never seem to pick a script (ie. from jQuery plugins) that is "minified" but i suppose i should. If i'm right Minified means to remove all unecessary stuff from source code without changing its functionality, so why dont we just have minified source and why bother with the full blown version? Why give people the option?

YOLO

When you're debugging, it's a lot easier to have the full source code. It's pretty difficult to debug when it says everything is on line 1 (since everything is usually condensed to just one long line), and an unreadable line 1 for that matter.

I test using the full blown version, and then I minify everything for deployment.

the minified version is difficult to understand and debug

the answer is pretty simple and don't need further explanation IMHO, from the jquery site

• CHOOSE YOUR COMPRESSION LEVEL:
• JQUERY-1.4.4.MIN.JS PRODUCTION (26KB, Minified and Gzipped)
• JQUERY-1.4.4.JS DEVELOPMENT (179KB, Uncompressed Code)

now, is fairly self explanatory:

• PRODUCTION = plug & play;
• DEVELOPMENT = Debugging, Modding, Coding....

hope this help!

Oh no! There is a bug in jQuery. You have to find and repair it.

You have used the minified version of jQuery.

This is the error message you have, your only tip on what could have happened:

Uncaught SyntaxError: Unexpected token )                       page.html:1

You do what you always do, looking at the line the error occured.

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Have fun!

You have used the normal version of jQuery.

This is your error message:

Uncaught SyntaxError: Unexpected token )                       page.html:5994       

You do what you always do, looking at the line the error occured.

5992    l = this.length;
5993
5994    if ( value === undefined && elem. ) {
5995        return elem.innerHTML;
5996    }
5997
5998    // See if we can take a shortcut and just use innerHTML
5999    if ( typeof value === "string" && !rnoInnerhtml.test( value ) && !wrapMap[ ( rtagName.exec( value ) || [ "", "" ] )[ 1 ].toLowerCase() ] ) {

Better, isn't it?

I know, late to the party, but I had so much fun making this :D

If you want to understand how the script works or extend it, then you better have a non-minified version of it.

Minified script is difficult to read for a human, and it's difficult to debug. For Javascript libraries like jQuery, it's nice to be able to read the source of whatever function you're using during debugging, to better understand how it works. In a production environment, you should definitely go with the minified version to speed up the data transfer.

My guess is that, originally, whoever wrote the JavaScript libraries wrote them as the "full-version" i.e. with the comments and code formatting built in - because as mentioned, code is far easier to read this way. However, whoever wrote the JavaScript libraries also knows that the minified version will be more lightweight and web friendly. Since the developer already has the "full-version", why would he/she not provide it along with a minified version?

In this case, providing a "full-version" does not require any extra work because it IS the original version. As long as the developer is going to provide a minified version - he might as well provide the full version used to make the minified version. With an open source JS library, providing a full version with comments and code formatting just makes it all that easier for the community to figure out what's going on.

That said I would recommend using the minified version in your production environments. Preferably a minified version delivered over a CDN.

To be simple , minified version is for production and non minimfied version is for development debugging purposes.

Espicially for performance , minified version is better. You can check the differenence between the load times through firebug net panel

Well you could use a PHP script to minify (and cache / gzip if needed) your js scripts on the fly. It's what I do most of the time.

It has all of the advantages of minifying your javascript without the disadvantages. Saves about 70% (gzip+minify) of the data transfered.