ngx-decorate/_bundle/esm2015/SubscribeTo.js

Useful decorators for Angular 2 and above

import { ensureSymbol } from './lib/ensureSymbol';
import { HookManager } from './lib/HookManager';
import { _subscrTo } from './lib/symbols';
import { subscribeTo } from './processors/subscribe-to';
import { unsubscribe } from './processors/unsubscribe';
/**
 * Subscribe to an observable and set its last emitted value to this property
 *
 * This decorator requires the ngOnInit hook and therefore will only work with directives and components.
 *
 * @param prop Property at which the observable resides
 * @param cfg Optional configuration
 */
export function SubscribeTo(prop, cfg = {}) {
    return (target, key) => {
        ensureSymbol(target, _subscrTo, [])
            .push({
            cfg,
            source: prop,
            target: key
        });
        const mgr = HookManager.for(target);
        mgr.add(2 /* POST_INIT */, subscribeTo);
        mgr.add(3 /* POST_DESTROY */, unsubscribe);
    };
}
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