How to use JSON data in Angular

Question

I am new to angular. I want to convert this array to JSON data and want to use it in my component. I tried using some methods mentioned in stackoverflow, but they didn't work for me.

projects = [
        {
            name: 'Project1',
            day1: 4.22,
            day2: 3.56,
            day3: 3,
            day4: 1,
            day5: 7.8,
        },
        {
            name: 'Project2',
            day1: 1,
            day2: 5,
            day3: 2.5,
            day4: 4,
            day5: 1.9,
        },
        {
            name: 'Project3',
            day1: 6.78,
            day2: 2.55,
            day3: 4,
            day4: 3,
            day5: 1,
        },
    ]

What do you mean you want to convert to JSON data? Save it as JSON file and use/import it somewhere else in your app or simply use it as object? — Francesco
– Francesco, Commented Apr 30, 2020 at 14:09
Can u create stackblitz how to use data? U can use this object in your component. What do u want to change — Cagri Tacyildiz
– Cagri Tacyildiz, Commented Apr 30, 2020 at 14:09
There is no such thing as a Json data in Javascript. There are objects and arrays. What you have here is already an array of objects. You don't need any conversions. Loop through them using *ngFor directive and access the properties directly. — Barremian
– Barremian, Commented Apr 30, 2020 at 14:09
to use this array of json in .html file use ngFor and to use in .ts file use for loop — Vinay
– Vinay, Commented Apr 30, 2020 at 14:10
Does this answer your question? How to print the json array values in a list using *ngFor in Angular 2? — Barremian
– Barremian, Commented Apr 30, 2020 at 14:11

void · Accepted Answer · 2020-04-30 14:09:32Z

0

What you actually want??? If you Want to stringify it then try like this..... var myJsonString = JSON.stringify(yourArray);

answered Apr 30, 2020 at 14:09

void

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Comments

Sandman · Accepted Answer · 2020-04-30 14:10:23Z

Json arrays are already javascript arrays. You can simply create a property in an angular component and use it in a template, perhaps with *ngFor, since it is an array in this case.

Your component:

import { Component } from '@angular/core';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent  {
  projects = [
    { name: 'Project1', day1: 4.22, day2: 3.56, day3: 3, day4: 1, day5: 7.8, },
    { name: 'Project2', day1: 1, day2: 5, day3: 2.5, day4: 4, day5: 1.9, },
    { name: 'Project3', day1: 6.78, day2: 2.55, day3: 4, day4: 3, day5: 1, }
    ];
}

Your template:

<p *ngFor="let project of projects">
    {{ project.name }} | {{project.day1}} | {{project.day2}} | {{project.day2}}
</p>

Angular snippet

Francesco · Accepted Answer · 2020-04-30 14:12:42Z

If you want to simply manipulate/use the array as object, you do not need to convert or save to JSON. You can access and us it simply as the following in your component:

const projects = [
        {
            name: 'Project1',
            day1: 4.22,
            day2: 3.56,
            day3: 3,
            day4: 1,
            day5: 7.8,
        },
        {
            name: 'Project2',
            day1: 1,
            day2: 5,
            day3: 2.5,
            day4: 4,
            day5: 1.9,
        },
        {
            name: 'Project3',
            day1: 6.78,
            day2: 2.55,
            day3: 4,
            day4: 3,
            day5: 1,
        },
    ]

 projects.map(p => console.log('Current project: ', p.name));

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