I was struggling with this as well. I added the following to the top of the TS file that contained the import {bootstrap} line: ///<reference path=”../node_modules/angular2/typings/browser.d.ts”/> Your path may be different of course for that file.
Cause For anyone seeing this, if you have written your own assert function, keep in mind that TypeScript cannot use arrowFunctions for assertions. See https://github.com/microsoft/TypeScript/issues/34523 Fix Change your assert function from an arrowFunction to standard function.
What are the proper typescript types for addEventListener mousemove and it’s event argument? Being explicit will set you free: onMouseMove: { (event: MouseEvent): void } = (event: MouseEvent) => { } Or, let TypeScript infer it from assignment 🌹: onMouseMove = (event: MouseEvent) => { }
As of TypeScript 2.6 (released on Oct 31, 2017), now there is a way to ignore all errors from a specific line using // @ts-ignore comments before the target line. The mentioned documentation is succinct enough, but to recap: // @ts-ignore const s : string = false disables error reporting for this line. However, this … Read more
TSC compiler alone can’t resolve the alias paths. So in order to make it work you will be required to install additional dev package npm install –save-dev tsc-alias tsc-alias is for replacing alias paths with relative paths after typescript compilation of tsc compiler because the compiler alone can’t resolve the alias paths After that you … Read more
The problem is that you’re adding the new properties at runtime and the compiler has no way of knowing that. If you know the property names in advance then you can do this: type Json = { foo: string; bar: string; } … const myInstance = new MyClass(someJson) as MyClass & Json; console.log(myInstance.foo) // no … Read more
You can do this at the top of your file (instead of import): /// <amd-dependency path=”just/referencingthis/forpackaging” />
Add this option in tsconfig.json { “compilerOptions”: { “skipLibCheck”: true }, }
The problem in my case was that I had installed tsc package instead of the correct typescript. From https://www.npmjs.com/package/tsc: Use typescript to get access to the tsc CLI command. The fix is: npm uninstall tsc npm install -D typescript Commands like npx tsc –version will still run because typescript provides the tsc executable.
It’s used when tsc is used only for type checking, not for compilation. That’s the case when some other tool (like Webpack, Parcel or Rollup) is responsible for compiling your code. If you are interested in running your code in an interactive mode, look into ts-node or ts-node-dev.