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r/typescript

137,397 subscribers
TypeScript is a language for application-scale JavaScript development.
TypeScript is a typed superset of JavaScript that compiles to plain JavaScript.

Notice: This subreddit is not actively monitored, so the posts here are only a small subset of what exists on reddit.

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to r/typescript by theapplekid
5 months ago
Are `{a: number} | {a: string}` and `{a: number | string}` exactly the same?
to r/typescript by Dont_trust_royalmail
9 months ago
Confused about Type Predicate/Guard Safety
to r/typescript by azn4lifee
4 months ago
Conditional type with never for function parameters
to r/typescript by GigfranGwaedlyd
4 days ago
TypeScript website's own manual has an example code that won't compile
to r/typescript by azn4lifee
4 months ago
TS keeps throwing file not found: root file specified for compilation error (details in post)
to r/typescript by MyVermontAccount121
1 year ago
Typescript errors on code that works using React Native Libraries. Specifically React Navigation and React Native Paper
to r/typescript by azn4lifee
4 months ago
How can I specify a generic to contain a non-array object?
to r/typescript by azn4lifee
4 months ago
Is it possible to generate a statically typed object based on function parameters?
to r/typescript by azn4lifee
4 months ago
ReturnType fails when inside a nested mapped type
to r/typescript by azn4lifee
4 months ago
A boolean type becomes true | false when being distributed in a union type
to r/typescript by azn4lifee
4 months ago
Does TypeScript have implicit generic types?
to r/typescript by azn4lifee
4 months ago
How can I specify a type for 1 specific key in a Record type?
to r/typescript by azn4lifee
4 months ago
How to specify the return type of a function if the function exists in the type?
to r/typescript by azn4lifee
4 months ago
Derived union type of const object doesn't work when wrapped in a template literal
to r/typescript by Jibajabb
2 months ago
Techniques to stop me duplicating logic?
to r/typescript by azn4lifee
4 months ago
Can I use the value of a key as an index elsewhere in a type?
to r/typescript by azn4lifee
4 months ago
Did TypeScript 4.9 add merging of array values in tsconfig or am I crazy?
to r/typescript by azn4lifee
4 months ago
How to use utility types on an inferred type and have it persist on the inferred variable?
to r/typescript by azn4lifee
4 months ago
Can I set the number of required function parameters based on a generic type?
to r/typescript by azn4lifee
4 months ago
What is the most concise way of typing "return an item or an array, depending on if the param is an item or an array"?
to r/typescript by azn4lifee
4 months ago
How can I reference an individual function type when using a mapped object type?
to r/typescript by azn4lifee
4 months ago
Is it possible to reference class variables inside of a method decorator?
to r/typescript by azn4lifee
4 months ago
[Help] How to have a class inherit all possible mapped values optionally?
in help
to r/typescript by azn4lifee
4 months ago
Is it possible to create a conditional type based on a literal array type?
to r/typescript by Unable_Count_1635
2 months ago
What does React.useState(true) | null>(null) mean ? When used in React.useState