tree: 799fd2ad8cda803467ec3367f6544307077e8efd [path history] [tgz]
  1. index.js
  2. LICENSE
  3. package.json
  4. readme.md
src/third_party/devtools/node_modules/onetime/readme.md

onetime Build Status

Ensure a function is only called once

When called multiple times it will return the return value from the first call.

Unlike the module once, this one isn't naughty extending Function.prototype.

Install

$ npm install --save onetime

Usage

let i = 0;

const foo = onetime(() => i++);

foo(); //=> 0
foo(); //=> 0
foo(); //=> 0
const foo = onetime(() => {}, {throw: true});

foo();

foo();
//=> Error: Function `foo` can only be called once

API

onetime(fn, [options])

Returns a function that only calls fn once.

fn

Type: Function

Function that should only be called once.

options

Type: Object

throw

Type: boolean
Default: false

Throw an error when called more than once.

License

MIT © Sindre Sorhus