Package Exports

lazy-get-decorator

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (lazy-get-decorator) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

Lazy Get decorator

Previously known as typescript-lazy-get-decorator.

Compatibility

Typescript - full
Spec-compliant decorator proposal - full
Babel (current proposal) - full
Babel (legacy) - full

API

/**
 * Evaluate the getter function and cache the result
 * @param {boolean} [setProto=false] Set the value on the class prototype as well. Only applies to non-static getters.
 * @param {boolean} [makeNonConfigurable=false] Set to true to make the resolved property non-configurable
 * @return {(target: any, key: string, descriptor: PropertyDescriptor) => void} A Typescript decorator function
 */
function LazyGetter(setProto: boolean = false, makeNonConfigurable = false) {}

Usage

import {LazyGetter} from 'lazy-get-decorator';

class AClass {

    @LazyGetter()
    get lazyNoProto(): string {
        console.log('Evaluating lazyNoProto');

        return 'lazyNoProtoValue';
    }

    @LazyGetter(true)
    get lazyWithProto(): string {
        console.log('Evaluating lazyWithProto');

        return 'lazyWithProtoValue';
    }
}

const inst1 = new AClass();

console.log('==== inst 1 ====\n');

console.log(inst1.lazyNoProto);
console.log(inst1.lazyNoProto);
console.log(inst1.lazyWithProto);
console.log(inst1.lazyWithProto);

const inst2 = new AClass();

console.log('\n\n==== inst 2 ====\n');

console.log(inst2.lazyNoProto);
console.log(inst2.lazyNoProto);
console.log(inst2.lazyWithProto);
console.log(inst2.lazyWithProto);

Output:

==== inst 1 ====

Evaluating lazyNoProto
lazyNoProtoValue
lazyNoProtoValue
Evaluating lazyWithProto
lazyWithProtoValue
lazyWithProtoValue


==== inst 2 ====

Evaluating lazyNoProto
lazyNoProtoValue
lazyNoProtoValue
lazyWithProtoValue
lazyWithProtoValue