You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
1.2 KiB
TypeScript
65 lines
1.2 KiB
TypeScript
8 months ago
|
declare namespace onetime {
|
||
|
|
interface Options {
|
||
|
|
/**
|
||
|
|
Throw an error when called more than once.
|
||
|
|
|
||
|
|
@default false
|
||
|
|
*/
|
||
|
|
throw?: boolean;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
declare const onetime: {
|
||
|
|
/**
|
||
|
|
Ensure a function is only called once. When called multiple times it will return the return value from the first call.
|
||
|
|
|
||
|
|
@param fn - Function that should only be called once.
|
||
|
|
@returns A function that only calls `fn` once.
|
||
|
|
|
||
|
|
@example
|
||
|
|
```
|
||
|
|
import onetime = require('onetime');
|
||
|
|
|
||
|
|
let i = 0;
|
||
|
|
|
||
|
|
const foo = onetime(() => ++i);
|
||
|
|
|
||
|
|
foo(); //=> 1
|
||
|
|
foo(); //=> 1
|
||
|
|
foo(); //=> 1
|
||
|
|
|
||
|
|
onetime.callCount(foo); //=> 3
|
||
|
|
```
|
||
|
|
*/
|
||
|
|
<ArgumentsType extends unknown[], ReturnType>(
|
||
|
|
fn: (...arguments: ArgumentsType) => ReturnType,
|
||
|
|
options?: onetime.Options
|
||
|
|
): (...arguments: ArgumentsType) => ReturnType;
|
||
|
|
|
||
|
|
/**
|
||
|
|
Get the number of times `fn` has been called.
|
||
|
|
|
||
|
|
@param fn - Function to get call count from.
|
||
|
|
@returns A number representing how many times `fn` has been called.
|
||
|
|
|
||
|
|
@example
|
||
|
|
```
|
||
|
|
import onetime = require('onetime');
|
||
|
|
|
||
|
|
const foo = onetime(() => {});
|
||
|
|
foo();
|
||
|
|
foo();
|
||
|
|
foo();
|
||
|
|
|
||
|
|
console.log(onetime.callCount(foo));
|
||
|
|
//=> 3
|
||
|
|
```
|
||
|
|
*/
|
||
|
|
callCount(fn: (...arguments: any[]) => unknown): number;
|
||
|
|
|
||
|
|
// TODO: Remove this for the next major release
|
||
|
|
default: typeof onetime;
|
||
|
|
};
|
||
|
|
|
||
|
|
export = onetime;
|