Best design pattern for constant strings using Typescript (or Javascript)?

Question

I have a view that has two modes - view and edit. I'm using angular so I will be using some directives to change the behavior of the page based on what mode it's in. I know it's common in C to #DEF some constant strings for use later. I was wondering if there is a good design pattern similar to this for use in JS. For example I will be doing something like:

    <input ng-if="mode==='edit'"></input>

Notice the string literal 'edit'

You can use Enums

Satpal
– Satpal

2017-04-10 18:07:47 +00:00
Commented Apr 10, 2017 at 18:07 — Satpal
– Satpal, Commented Apr 10, 2017 at 18:07

Wannes Van Dorpe · Accepted Answer · 2017-04-10 18:16:22Z

1

Enums like Satpal suggested are indeed a nice feature in typescript. However in you're case I would suggest to just use a boolean on you component (or if the mode is app-wide maybe a service).

Your html is also much cleaner, something like this:

<input ng-if="editMode"></input>

answered Apr 10, 2017 at 18:16

Wannes Van Dorpe

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Max Paymar Over a year ago

I think you are right. Enums seem to be a bit overkill in this situation. However I will definitely keep them in mind for the future!

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