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@spa-tools/utilities

ExecOnce()

The ExecOnce<T>() class ingests a callback that can only be executed once per class initialization via the class's exec method.

The generic T type is used to define the type of the callback.

Usage​

import { ExecOnce } from '@spa-tools/utilities';

const fn = (a: number, b: number) => {
  console.log('executing fn that adds a and b');
  return a + b;
};

const execOnce = new ExecOnce(fn);

const result = execOnce.exec(1, 2);
// --> executing fn that adds a and b
console.log(result);
// --> 3

console.log(execOnce.hasExecuted);
// --> true

const notCalled = execOnce.exec(1, 2);
console.log(notCalled);
// --> undefined

Constructor​

NameTypeDescription
callbackTThe function to execute only once

Methods​

exec​

Executes the ingested callback function.

Properties​

hasExecuted​

Returns true if the callback has been executed, false otherwise.