CODEWITHSUNDEEP
angular
Angel Angel
Angel Angel

Reputation: 21688

What are some good alternatives to accessing the DOM using nativeElement in Angular2?

Taking as an example the following code, which are good alternatives to accessing the DOM using nativeElement 

import {Component, Directive, Input, ElementRef} from 'angular2/core';

@Directive({
    selector: '[myDR]',
    host:{
        '(mouseenter)' : ' mouseEnter()'
    }
})

export class MyDi {

    @Input () myColor: string;

    constructor(private el:ElementRef) {

    }

    mouseEnter(){

        this.el.nativeElement.style.backgroundColor = this.myColor;

        console.log(this.myColor);
     }
}

This is a Plunker for you test more easy.

Upvotes: 4

Views: 2230

Answers (1)

Eric Martinez
Eric Martinez

Reputation: 31787

Since accessing directly to DOM through nativeElement is discouraged you have three options

  • Using host property (this will set the color immediatly)
@Directive({
    host:{
        '(mouseenter)' : ' mouseEnter()',
        '[style.background-color]' : 'myColor'
    }
})

mouseEnter(){
    this.myColor = 'blue';
}
  • Using @HostBinding (this case will set the color immediatly)
@HostBinding('style.background-color') get color {
    return this.myColor;
}

mouseEnter(){
    this.myColor = 'blue';
}
  • Using Renderer (use this instead of nativeElement.style = 'value')
constructor(public renderer: Renderer, public element: ElementRef) {}

mouseEnter(){
  this.renderer.setElementStyle(this.element.nativeElement, 'background-color', this.myColor);
}

Note that host and @HostBinding are equivalent.

Upvotes: 4

Related Questions