在Angular2中对valueChanges进行空订阅 [英] Empty subscribe on valueChanges in Angular2
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问题描述
我有这种奇怪的情况,如果保留为空,则永远不会触发订阅.
I have this weird case, a subscribe that never fires if left empty.
这不起作用:
this.formGroup.get('unitCount').valueChanges
.do(value => console.log(value))
.subscribe();
这很好时:
this.formGroup.get('unitCount').valueChanges
.do(value => console.log(value))
.subscribe(() => true);
在这里我使用了()=> true ,但是它可以是 false , void 0 ,甚至是空对象 {}
Here I used () => true, but it could anything, false, void 0, even an empty object {}
为什么不能保留 subscribe()为空?
推荐答案
您可能具有较旧的RxJS 5版本.这是一个错误,但已经修复.
You probably have a older version of RxJS 5. This was a bug but is already fixed.
I can't find since what version it works correctly, but this PR could be related to this: https://github.com/ReactiveX/rxjs/pull/1935
否则,请显示您使用的确切RxJS版本.
Otherwise, show what exact RxJS version you're using.
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