How to change app wide css in Angular 2?

2019-05-26 16:59发布

In my application I have different CSS file like fire.css, lake.css each giving different look to complete application.

Currently, I implemented with only 1 file main.css and added this file to
index.html

<link rel="stylesheet" href="resources/styles/main.css">  
<link rel="stylesheet" href="resources/styles/themes.css">
<link rel="stylesheet" href="resources/styles/common.css">
<link rel="stylesheet" href="resources/styles/plugins.css">

Now I wanted to change this dynamically as user select from the drop-down list.

My Idea: Copy all css files to app folder and add themes there.
Folder structure is

I added css to styleUrls in app.components.ts App component now is

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

@Component({

    selector: 'workshop-app',    
    template: `
        <body>
           <router-outlet></router-outlet>
       </body>
    `,
    directives : [ ROUTER_DIRECTIVES ],
    styleUrls : ['app/lake.css']
})
export class AppComponent { }

Contents from Lake.css file is added to style tag under but not making changes in the app.

标签： css angular stylesheet angular2-template angular2-directives

1条回答

疯言疯语

2楼-- · 2019-05-26 17:38

add this to the app.component.html

<head>
<link id="theme" rel='stylesheet' href='demo.css'>    
</head>

add this to app.component.ts

import { Component, Inject } from '@angular/core';
import { DOCUMENT } from '@angular/platform-browser';    
constructor (@Inject(DOCUMENT) private document) { }
ngOnInit() {
  this.document.getElementById('theme').setAttribute('href', 'demo2.css');
}

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How to change app wide css in Angular 2?

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