define-lazy-prop 2.0.0

Define-lazy-prop is an NPM package that lets you define a lazily evaluated property on an object. Lazy evaluation is a programming concept where the evaluation of expressions is delayed until their results are needed. This technique is especially useful when the value of a property is costly to compute, so you'd want to defer the computation until the property is necessary. For instance, optimizing startup performance by postponing non-essential operations is a potential use case.

To use define-lazy-prop, you first need to install it using npm. You can do this by running npm install define-lazy-prop in your console. Once installed, you can import defineLazyProperty from 'define-lazy-prop' in your JavaScript file.

Here's an example of how to use define-lazy-prop:

import defineLazyProperty from 'define-lazy-prop';

const unicorn = {
   // …
};

defineLazyProperty(unicorn, 'rainbow', () => expensiveComputation());

app.on('user-action', () => {
   doSomething(unicorn.rainbow);
});

In this example, 'rainbow' is a lazily evaluated property on the 'unicorn' object. The expensiveComputation function will only run when 'unicorn.rainbow' is first accessed, for example in the 'doSomething' function.

The documentation for define-lazy-prop is embedded within the README file hosted on the package's GitHub repository. It provides a comprehensive guide on how to use the package, explaining the method signature and giving a practical usage example. In the API section of the README, you'll find details about defineLazyProperty, the primary function that the library exports, along with its parameters: object, propertyName, and valueGetter.