typescript import alias or variable declaration with commonjs

Question

The follow constructs generate the same js and type hints. Is there any difference between the two, and when should one be used over the other?

Import alias:

import mod = require('./mod');
import Foo = mod.Foo;
var foo = new Foo();

Variable alias:

import mod = require('./mod');
var Foo = mod.Foo;
var foo = new Foo();

Output from both w/commonjs:

var mod = require('./mod');
var Foo = mod.Foo;
var foo = new Foo();

Community · Accepted Answer · 2017-05-23 12:12:51Z

2

Is there any difference between the two, and when should one be used over the other?

Yes. import also brings it into the type declaration space. This is only significant for TypeChecking and not significant in the generated JS.

CommunityBot

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answered Nov 20, 2014 at 5:27

basarat

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