False or empty object if condition not working in angular 5

Question

I'm getting false in the response from the api. If I console.log the result then it shows {}. What I want to do is, if the response is false then redirect to the homepage. But the false condition is not working. Below is my code:

this.sub = this.route.params.subscribe(params => {
    this.token = params['Token'];
    this.common.createAPIService('api/users/recoverpassword/ValidateLink?Token=' + this.token + '', '').subscribe((result: any) => {

        console.log(result);
        if (!result || result == {} || result == false) {
            this.common.ShowNotification("Change Password", "Invalid Request", "error");
            // setTimeout(function () {
            //     window.location.href = "#";
            // }, 3000);
            console.log(12);
            this.zone.run(() => this.router.navigateByUrl("/home/" + "Mumbai"));
        }
    });
});

I tried !result, {}, even result == false but it's not working. The alert in condition or console.log not coming. Please help.

since `console.log` shows empty `object`,you can try `Object.keys(result).length === 0` — Sarthak Aggarwal, Nov 13 '18 at 07:40
@SarthakAggarwal. another issue. If response is true then also it's redirecting. In the case of true in console.log true is getting — Sagar Kodte, Nov 13 '18 at 07:52
@SagarKodte can you share your JSON response for both the cases? — Sarthak Aggarwal, Nov 13 '18 at 07:54
If I console.log result in true case It getting true in console, but in false getting empty object in console — Sagar Kodte, Nov 13 '18 at 07:56

score 0 · Answer 1 · answered Nov 13 '18 at 07:41

Use === instead of ==

 if (!result || result === {} || result === false) {
                    this.common.ShowNotification("Change Password", "Invalid Request", "error");
                    // setTimeout(function () {
                    //     window.location.href = "#";
                    // }, 3000);
                    console.log(12);
                    this.zone.run(() => this.router.navigateByUrl("/home/" + "Mumbai"));
                }

For more you can refer this == vs ===

score 0 · Answer 2 · answered Nov 13 '18 at 07:46

0

In Javascript, you should check whether it is truthy or falsy in your condition

Refer https://developer.mozilla.org/en-US/docs/Glossary/Truthy

answered Nov 13 '18 at 07:46

Hari Prathap

102
7

False or empty object if condition not working in angular 5

2 Answers2