TypeScript will translate ES6 (ES2015) modules into a variety of formats e.g. CommonJS for Node.js or AMD for require.js in browsers.
I found it a pain to have to switch my tsconfig.json back and forth to run my tests in Node.js or to run the actual code in the browser. Inevitably I'd forget to switch and/or recompile and it wouldn't work. I had to check one or the other version of tsconfig.json into Git, but that would confuse anyone who downloaded and tried to run the code.
I could probably set up a build process to generate both versions but I never got around to figuring that out.
I knew some code was written in a way that would work with both CommonJS and AMD and wondered why TypeScript didn't generate that format. Guess what, it does :-) TypeScript calls this output "UMD" or "isomorphic". (See TypeScript Modules under Code Generation)
"compilerOptions": {
"module": "umd",
I found it a pain to have to switch my tsconfig.json back and forth to run my tests in Node.js or to run the actual code in the browser. Inevitably I'd forget to switch and/or recompile and it wouldn't work. I had to check one or the other version of tsconfig.json into Git, but that would confuse anyone who downloaded and tried to run the code.
I could probably set up a build process to generate both versions but I never got around to figuring that out.
I knew some code was written in a way that would work with both CommonJS and AMD and wondered why TypeScript didn't generate that format. Guess what, it does :-) TypeScript calls this output "UMD" or "isomorphic". (See TypeScript Modules under Code Generation)
"compilerOptions": {
"module": "umd",
The generated code is slightly larger since it basically contains both versions, but that's not a big deal.
Eventually (I hope) software will support ES6/2015 modules natively and you won't have to translate at all.
For backgrounds see What is AMD, CommonJS, and UMD?
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