how to implement regions/code collapse in javascript

Microsoft now has an extension for VS 2010 that provides this functionality:

JScript Editor Extensions

For those about to use the visual studio 2012, exists the Web Essentials 2012

For those about to use the visual studio 2015, exists the Web Essentials 2015.3

The usage is exactly like @prasad asked

Thats easy!

Mark the section you want to collapse and,

Ctrl+M+H

And to expand use '+' mark on its left.

Good news for developers who is working with latest version of visual studio

The Web Essentials are coming with this feature .

Check this out

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Note: For VS 2017 use JavaScript Regions : https://marketplace.visualstudio.com/items?itemName=MadsKristensen.JavaScriptRegions

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