How to add region to collapse and expand code in javascript. If any body knows solution, it will be great. thanks in advance.
It depends only on the IDE.
vscode, for example, added support for code regions in september 2017
https://code.visualstudio.com/updates/v1_17#_folding-regions
For javascript:
//#region
code
//#endregion
or
//region
and
//endregion
The same syntax could work also in different IDEs.