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  • License MIT

Only call a function once. Unlike the module `once`, this one isn't naughty extending `Function.prototype`.

Package Exports

  • onetime

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (onetime) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

onetime Build Status

Only call a function 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
$ bower install --save onetime
$ component install sindresorhus/onetime

Usage

var i = 0;

var foo = onetime(function () {
    return i++;
});

foo(); //=> 0
foo(); //=> 0
foo(); //=> 0

API

onetime(function, [shouldThrow])

function

Type: function

Function that should only be called once.

shouldThrow

Type: boolean
Default: false

Set to true if you want it to fail with a nice and descriptive error when called more than once.

License

MIT © Sindre Sorhus