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@Marton had an important objection to the accepted answer on the grounds that the pipe creates a new collection on each change detection. I would instead create an HtmlService which provides a range of utility functions which the view can use as follows:

@Component({ selector: 'app-myview', template: `<div *ngFor="let i of html.keys(items)">{{i + ' : ' + items[i]}}</div>` }) export class MyComponent { items = {keyOne: 'value 1', keyTwo: 'value 2', keyThree: 'value 3'}; constructor(private html: HtmlService){} } @Injectable() export class HtmlService { keys(object: {}) { return Object.keys(object); } // ... other useful methods not available inside html, like isObject(), isArray(), findInArray(), you'll think of others... } 

@Marton had an important objection to the accepted answer on the grounds that the pipe creates a new collection on each change detection. I would instead create an HtmlService which provides a range of utility functions which the view can use as follows:

@Component({ selector: 'app-myview', template: `<div *ngFor="let i of html.keys(items)">{{i + ' : ' + items[i]}}</div>` }) export class MyComponent { items = {keyOne: 'value 1', keyTwo: 'value 2', keyThree: 'value 3'}; constructor(private html: HtmlService){} } @Injectable() export class HtmlService { keys(object: {}) { return Object.keys(object); } // ... other useful methods not available inside html, like isObject(), isArray(), findInArray(), and others... } 

@Marton had an important objection to the accepted answer on the grounds that the pipe creates a new collection on each change detection. I would instead create an HtmlService which provides a range of utility functions which the view can use:

@Component({ selector: 'app-myview', template: `<div *ngFor="let i of html.keys(items)">{{i + ' : ' + items[i]}}</div>` }) export class MyComponent { items = {keyOne: 'value 1', keyTwo: 'value 2', keyThree: 'value 3'}; constructor(private html: HtmlService){} } @Injectable() export class HtmlService { keys(object: {}) { return Object.keys(object); } // ... other useful methods not available inside html, like isObject(), isArray(), findInArray(), you'll think of others... } 

@Marton had an important objection to the accepted answer on the grounds that the pipe creates a new collection on each change detection. I would instead create an HtmlService which provides a range of utility functions which the view can use as follows:

@Component({ selector: 'app-myview', template: `<div *ngFor="let i of html.keys(items)">{{i + ' : ' + items[i]}}</div>` }) export class MyComponent { items = {keyOne: 'value 1', keyTwo: 'value 2', keyThree: 'value 3'}; constructor(private html: HtmlService){} } @Injectable() export class HtmlService { keys(object: {}) { return Object.keys(object); } // ... other useful methods not available inside html, like isObject(), isArray(), findInArray(), you'll think of others... } 

@Marton had a very valid objection to the accepted answer on the grounds that the pipe creates a new collection on each change detection. I would instead create an HtmlService which provides a range of utility functions to the view:

@Component({ selector: 'app-myview', template: `<div *ngFor="let i of html.keys(items)">{{i + ' : ' + items[i]}}</div>` }) export class MyComponent { items = {keyOne: 'value 1', keyTwo: 'value 2', keyThree: 'value 3'}; constructor(private html: HtmlService){} } @Injectable() export class HtmlService { keys(object: {}) { return Object.keys(object); } // ... other useful methods not available inside html, like isObject(), isArray(), findInArray(), you'll think of others... } 

@Marton had an important objection to the accepted answer on the grounds that the pipe creates a new collection on each change detection. I would instead create an HtmlService which provides a range of utility functions which the view can use:

@Component({ selector: 'app-myview', template: `<div *ngFor="let i of html.keys(items)">{{i + ' : ' + items[i]}}</div>` }) export class MyComponent { items = {keyOne: 'value 1', keyTwo: 'value 2', keyThree: 'value 3'}; constructor(private html: HtmlService){} } @Injectable() export class HtmlService { keys(object: {}) { return Object.keys(object); } // ... other useful methods not available inside html, like isObject(), isArray(), findInArray(), you'll think of others... }