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Since typescript 2.0 instead of typings we are supposed to use npm install @types/<package-name>.
In typings we have typings search command for package lookups.
My question is - what is the canonical way to search type definitions in @types?
So, to clarify, till now the workflow was:
typings search <package-name>typings install [--global] <package-name>Now:
npm install --save-dev @types/<package-name>
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TypeScript automatically finds type definitions under node_modules/@types , so there's no other step needed to get these types available in your program.
Use the typeof operator to check the type of a variable in TypeScript, e.g. if (typeof myVar === 'string') {} . The typeof operator returns a string that indicates the type of the value and can be used as a type guard in TypeScript.
What does ?: mean in TypeScript? Using a question mark followed by a colon ( ?: ) means a property is optional. That said, a property can either have a value based on the type defined or its value can be undefined .
What is a type in TypeScript. In TypeScript, a type is a convenient way to refer to the different properties and functions that a value has. A value is anything that you can assign to a variable e.g., a number, a string, an array, an object, and a function. When you look at this value, you can say that it's a string.
Not sure if this is possible with console, but Microsoft has provided this tool online to do that. You can find more details in this post.
I guess the idea is that all the names are maintained after @types/. So if the npm package name is my-test-package, then you should have @types/my-test-package if it exists at all and name can be used.
Unfortunately it seems that the NPM UI itself (and most likely API for the same reson) is rather bad with search for stuff that starts with @, so both @types and @angular does not give you the expected result. I do believe it's a bug and hope it'll be fixed.
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