12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364 |
- 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;
|