Learning TypeScript 2.x - Second Edition

Modules summary

We can summarize all the preceding details using the following comparison table:

Module syntax	Design-time support	Module loader runtime support	Native runtime support	Optimization tool support	Recommended
Legacy internal modules	Yes	No	Yes (via closures)	No	No
Namespaces	Yes	No	Yes (via closures)	No	No
ES6	Yes	Yes	Yes	Yes	Yes
Legacy external modules	Yes	Yes	No	Yes	No
AMD	No	Yes	No	Yes	No
CommonJS	No	Yes	No	Yes	No
UMD	No	Yes	No	Yes	No
SystemJS	No	Yes	No	Yes	No

As we can see, the recommended solution going forward is the usage of ES6 modules. If you are targeting a JavaScript engine that doesn't ...