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onetime

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

let i = 0;

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

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

Type: function

Function that should only be called once.

Type: boolean
Default: false

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