How to use @template with destructured arguments in JSDoc/Typescript
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in typescript i can do something like this:
const foo = <T>({ someArg }: { someArg: T }) => someArg
foo({ someArg: 4 }) // returns a number
foo({ someArg: "cool" }) // returns a string
how do i do the equivalent with jsdoc / checkjs? i assumed it would look like:
/**
* @template T
*
* @param {object} props
* @param {T} props.someArg
* @returns {T}
*/
const foo = ({ someArg }) => someArg
foo({ someArg: 4 })
foo({ someArg: 'cool' })
but i get an error that looks like this:
src/components/example.js:10:7 - error TS2322: Type 'number' is not assignable to type 'T'.
10 foo({ someArg: 4 })
~~~~~~~
src/components/example.js:5:4
5 * @param {T} props.someArg
~~~~~~~~~~~~~~~~~~~~~~~~
6 * @returns {T}
~~~
The expected type comes from property 'someArg' which is declared here on type '{ someArg: T; }'
src/components/example.js:11:7 - error TS2322: Type 'string' is not assignable to type 'T'.
11 foo({ someArg: 'cool' })
~~~~~~~
src/components/example.js:5:4
5 * @param {T} props.someArg
~~~~~~~~~~~~~~~~~~~~~~~~
6 * @returns {T}
~~~
The expected type comes from property 'someArg' which is declared here on type '{ someArg: T; }'
~~~~~~~
not destructuring the args seems to work a-ok:
/**
* @template T
*
* @param {object} props
* @param {T} props.someArg
* @returns {T}
*/
const foo = props => props.someArg
update - i think it's likely this issue:
Generic types from JSDoc aren't really generic
typescript jsdoc checkjs
asked Nov 26 '18 at 21:24
schpetschpet
3,00411929
add a comment |
0
in typescript i can do something like this:
const foo = <T>({ someArg }: { someArg: T }) => someArg
foo({ someArg: 4 }) // returns a number
foo({ someArg: "cool" }) // returns a string
how do i do the equivalent with jsdoc / checkjs? i assumed it would look like:
/**
* @template T
*
* @param {object} props
* @param {T} props.someArg
* @returns {T}
*/
const foo = ({ someArg }) => someArg
foo({ someArg: 4 })
foo({ someArg: 'cool' })
but i get an error that looks like this:
src/components/example.js:10:7 - error TS2322: Type 'number' is not assignable to type 'T'.
10 foo({ someArg: 4 })
~~~~~~~
src/components/example.js:5:4
5 * @param {T} props.someArg
~~~~~~~~~~~~~~~~~~~~~~~~
6 * @returns {T}
~~~
The expected type comes from property 'someArg' which is declared here on type '{ someArg: T; }'
src/components/example.js:11:7 - error TS2322: Type 'string' is not assignable to type 'T'.
11 foo({ someArg: 'cool' })
~~~~~~~
src/components/example.js:5:4
5 * @param {T} props.someArg
~~~~~~~~~~~~~~~~~~~~~~~~
6 * @returns {T}
~~~
The expected type comes from property 'someArg' which is declared here on type '{ someArg: T; }'
~~~~~~~
not destructuring the args seems to work a-ok:
/**
* @template T
*
* @param {object} props
* @param {T} props.someArg
* @returns {T}
*/
const foo = props => props.someArg
update - i think it's likely this issue:
Generic types from JSDoc aren't really generic
typescript jsdoc checkjs
asked Nov 26 '18 at 21:24
schpetschpet
3,00411929
add a comment |
0
0
0
in typescript i can do something like this:
const foo = <T>({ someArg }: { someArg: T }) => someArg
foo({ someArg: 4 }) // returns a number
foo({ someArg: "cool" }) // returns a string
how do i do the equivalent with jsdoc / checkjs? i assumed it would look like:
/**
* @template T
*
* @param {object} props
* @param {T} props.someArg
* @returns {T}
*/
const foo = ({ someArg }) => someArg
foo({ someArg: 4 })
foo({ someArg: 'cool' })
but i get an error that looks like this:
src/components/example.js:10:7 - error TS2322: Type 'number' is not assignable to type 'T'.
10 foo({ someArg: 4 })
~~~~~~~
src/components/example.js:5:4
5 * @param {T} props.someArg
~~~~~~~~~~~~~~~~~~~~~~~~
6 * @returns {T}
~~~
The expected type comes from property 'someArg' which is declared here on type '{ someArg: T; }'
src/components/example.js:11:7 - error TS2322: Type 'string' is not assignable to type 'T'.
11 foo({ someArg: 'cool' })
~~~~~~~
src/components/example.js:5:4
5 * @param {T} props.someArg
~~~~~~~~~~~~~~~~~~~~~~~~
6 * @returns {T}
~~~
The expected type comes from property 'someArg' which is declared here on type '{ someArg: T; }'
~~~~~~~
not destructuring the args seems to work a-ok:
/**
* @template T
*
* @param {object} props
* @param {T} props.someArg
* @returns {T}
*/
const foo = props => props.someArg
update - i think it's likely this issue:
Generic types from JSDoc aren't really generic
typescript jsdoc checkjs
asked Nov 26 '18 at 21:24
schpetschpet
3,00411929
in typescript i can do something like this:
const foo = <T>({ someArg }: { someArg: T }) => someArg
foo({ someArg: 4 }) // returns a number
foo({ someArg: "cool" }) // returns a string
how do i do the equivalent with jsdoc / checkjs? i assumed it would look like:
/**
* @template T
*
* @param {object} props
* @param {T} props.someArg
* @returns {T}
*/
const foo = ({ someArg }) => someArg
foo({ someArg: 4 })
foo({ someArg: 'cool' })
but i get an error that looks like this:
src/components/example.js:10:7 - error TS2322: Type 'number' is not assignable to type 'T'.
10 foo({ someArg: 4 })
~~~~~~~
src/components/example.js:5:4
5 * @param {T} props.someArg
~~~~~~~~~~~~~~~~~~~~~~~~
6 * @returns {T}
~~~
The expected type comes from property 'someArg' which is declared here on type '{ someArg: T; }'
src/components/example.js:11:7 - error TS2322: Type 'string' is not assignable to type 'T'.
11 foo({ someArg: 'cool' })
~~~~~~~
src/components/example.js:5:4
5 * @param {T} props.someArg
~~~~~~~~~~~~~~~~~~~~~~~~
6 * @returns {T}
~~~
The expected type comes from property 'someArg' which is declared here on type '{ someArg: T; }'
~~~~~~~
not destructuring the args seems to work a-ok:
/**
* @template T
*
* @param {object} props
* @param {T} props.someArg
* @returns {T}
*/
const foo = props => props.someArg
update - i think it's likely this issue:
Generic types from JSDoc aren't really generic
typescript jsdoc checkjs
typescript jsdoc checkjs
asked Nov 26 '18 at 21:24
schpetschpet
3,00411929
asked Nov 26 '18 at 21:24
schpetschpet
3,00411929
edited Nov 29 '18 at 22:52
schpet
asked Nov 26 '18 at 21:24
schpetschpet
3,00411929
asked Nov 26 '18 at 21:24
schpetschpet
3,00411929
asked Nov 26 '18 at 21:24
schpetschpet
3,00411929
3,00411929
add a comment |
add a comment |
0
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