javascript - Typescript import/as vs import/require? -

this question has answer here:

• new es6 syntax importing commonjs / amd modules i.e. `import foo = require('foo')` 3 answers

i using typescript express/node.js.

for consuming modules, typescript handbook shows following syntax:

import express = require('express');

but typescript.d.ts file shows:

import * express "express";

i searched msdn blog not find anything.

which 1 more correct of 2016? differences between two, if any?

where best source find information on latest syntax use can find information in future?

these equivalent, import * has restrictions import ... = require doesn't.

import * as creates identifier module object, emphasis on object. according es6 spec, object never callable or newable - has properties. if you're trying import function or class, should use

import express = require('express'); 

or (depending on module loader)

import express 'express'; 

attempting use import * express , invoking express() illegal according es6 spec. in runtime+transpilation environments might happen work anyway, might break @ point in future without warning, make sad.