如何在 Angular 2 中更改应用程序范围的 css? [英] How to change app wide css in Angular 2?
问题描述
在我的应用程序中，我有不同的 CSS 文件，如 fire.css、lake.css，每个文件都为完整的应用程序提供了不同的外观.
In my application I have different CSS file like fire.css, lake.css each giving different look to complete application.
目前，我仅使用 1 个文件 main.css 实现并将此文件添加到
index.html
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">
现在我想在用户从下拉列表中选择时动态更改此设置.
Now I wanted to change this dynamically as user select from the drop-down list.
我的想法:将所有 css 文件复制到 app 文件夹并在那里添加主题.
文件夹结构是
My Idea:
Copy all css files to app folder and add themes there.
Folder structure is
app
|-----app.component.ts
|-----app.routes.ts
|-----main.css
|-----lake.css
|-----登录
|-----其他组件...
app
|-----app.component.ts
|-----app.routes.ts
|-----main.css
|-----lake.css
|-----Login
|-----Other Components...
我在 app.components.ts 中向 styleUrls 添加了 css 应用组件现在是
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 { }
Lake.css 文件中的内容已添加到样式标记下，但不会在应用程序中进行更改.
Contents from Lake.css file is added to style tag under but not making changes in the app.
推荐答案
将此添加到 app.component.html
add this to the app.component.html
<head>
<link id="theme" rel='stylesheet' href='demo.css'>
</head>
将此添加到 app.component.ts
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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