TypeScript does not auto-polyfill code (see microsoft/TypeScript#3101). The “official” reason from the relevant GitHub issue seems to be, as @RyanCavanaugh said: Having the compiler try to figure out which [ES20XX] methods you need, and where to emit them, and when, with controls for people who don’t want the polyfills emitted, and ways to change where … Read more
Since Typescript 1.5, this can also be set in the tsconfig.json file: “compilerOptions”: { “outDir”: “DIRECTORY” … original answer Use the option –outDir on tsc (configured within the File Watcher in IntelliJ) From the command line documentation –outDir DIRECTORY Redirect output structure to the directory.
Quickfix is to skip the check { “compilerOptions”: { “skipLibCheck”: true }, }
A few tips in order restart the terminal restart the machine reinstall nodejs + then run npm install typescript -g If it still doesn’t work run npm config get prefix to see where npm install -g is putting files (append bin to the output) and make sure that they are in the path (the node … Read more
[2018/12] New, up-to-date, answer to this question I asked in 2016, which stills shows a lot of activity despite having outdated answers. Long story short, TypeScript requires type informations about your package’s code (a.k.a. “type declaration files” a.k.a. “typings”) and rightfully tells you that you would otherwise be losing the whole point of TypeScript. There … Read more
TL;DR Just write export {} in the outermost scope of your files. At some point there needs to be a semantic disambiguation for whether a file should be treated as a module (and have its own scope) or a script (and share the global scope with other scripts). In the browser, this is easy – … Read more
To augment Ryan’s answer with guidance from the TypeScript Do’s and Don’ts: Don’t ever use the types Number, String, Boolean, Symbol, or Object These types refer to non-primitive boxed objects that are almost never used appropriately in JavaScript code. /* WRONG */ function reverse(s: String): String; Do use the types number, string, boolean, and symbol. … Read more
There are a few options available for you depending on the library in question, how it’s written, and what level of accuracy you’re looking for. Let’s review the options, in roughly descending order of desirability. Maybe It Exists Already Always check DefinitelyTyped (https://github.com/DefinitelyTyped/DefinitelyTyped) first. This is a community repo full of literally thousands of .d.ts … Read more