Define a lazily evaluated property on an object
Useful when the value of a property is expensive to generate, so you want to delay the computation until the property is needed. For example, improving startup performance by deferring nonessential operations.
$ npm install define-lazy-prop
const defineLazyProp = require('define-lazy-prop'); const unicorn = { // … }; defineLazyProp(unicorn, 'rainbow', () => expensiveComputation()); app.on('user-action', () => { doSomething(unicorn.rainbow); });
Type: Object
Object to add property to.
Type: string
Name of the property to add.
Type: Function
Called the first time propertyName
is accessed. Expected to return a value.
MIT © Sindre Sorhus