1.3 KiB
1.3 KiB
define-lazy-prop 
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.
Install
$ npm install define-lazy-prop
Usage
const defineLazyProp = require('define-lazy-prop');
const unicorn = {
// …
};
defineLazyProp(unicorn, 'rainbow', () => expensiveComputation());
app.on('user-action', () => {
doSomething(unicorn.rainbow);
});
API
defineLazyProp(object, propertyName, fn)
object
Type: Object
Object to add property to.
propertyName
Type: string
Name of the property to add.
fn
Type: Function
Called the first time propertyName is accessed. Expected to return a value.
Related
- lazy-value - Create a lazily evaluated value
- import-lazy - Import a module lazily
- p-lazy - Create a lazy promise
License
MIT © Sindre Sorhus