ngx-decorate/_bundle/esm2015/LazySubject.js

Useful decorators for Angular 2 and above

import { ensureSymbol } from './lib/ensureSymbol';
import { HookManager } from './lib/HookManager';
import { _lazySubj } from './lib/symbols';
import { lazySubj } from './processors/lazy-subject';
/**
 * Decorate a getter that returns a subject. The subject will automatically get completed
 * when the component/service/pipe is destroyed.
 */
export function LazySubject() {
    return (_target, key, desc) => {
        const orig = desc.get;
        if (!orig) {
            throw new Error('LazySubject can only decorate getters');
        }
        desc.get = function () {
            const value = orig.apply(this, arguments);
            Object.defineProperty(this, key, {
                configurable: true,
                enumerable: desc.enumerable,
                value
            });
            ensureSymbol(this, _lazySubj, []).push(value);
            return value;
        };
        HookManager.for(_target).add(3 /* POST_DESTROY */, lazySubj);
    };
}
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