[英]Angular Material Components Not Displayed
我是 Angular 2 和 Angular Material 的新手 我嘗試創建一個示例來檢查 Angular Material 但它不起作用。 我得到空的 html 頁面。 我的代碼如下。
應用程序組件 ts:
import { Component } from '@angular/core';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'app';
}
應用模塊.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import {MdSidenavModule,MdMenuModule} from '@angular/material';
import {BrowserAnimationsModule} from '@angular/platform-browser/animations';
import {NoopAnimationsModule} from '@angular/platform-browser/animations';
import 'hammerjs';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
MdSidenavModule,
BrowserAnimationsModule,
NoopAnimationsModule,
MdMenuModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
應用程序組件 Html;
<!--The whole content below can be removed with the new code.-->
<link href="https://unpkg.com/@angular/material/prebuilt-themes/indigo-pink.css" rel="stylesheet">
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
<div>
<md-sidenav-container>
<md-sidenav opened="true">
<button>
Add
</button>
</md-sidenav>
</md-sidenav-container>
<md-menu>
<button md-menu-item> Settings </button>
<button md-menu-item> Help </button>
</md-menu>
</div>
樣式.css
@import "../node_modules/@angular/material/prebuilt-themes/deeppurple-amber.css";
我的包.json
{
"name": "asyncpipe",
"version": "0.0.0",
"license": "MIT",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/animations": "^4.2.6",
"@angular/cdk": "^2.0.0-beta.8",
"@angular/common": "^4.0.0",
"@angular/compiler": "^4.0.0",
"@angular/core": "^4.0.0",
"@angular/forms": "^4.0.0",
"@angular/http": "^4.0.0",
"@angular/material": "^2.0.0-beta.8",
"@angular/platform-browser": "^4.0.0",
"@angular/platform-browser-dynamic": "^4.0.0",
"@angular/router": "^4.0.0",
"core-js": "^2.4.1",
"hammerjs": "^2.0.8",
"rxjs": "^5.1.0",
"zone.js": "^0.8.4"
},
"devDependencies": {
"@angular/cli": "1.1.2",
"@angular/compiler-cli": "^4.0.0",
"@angular/language-service": "^4.0.0",
"@types/jasmine": "2.5.45",
"@types/node": "~6.0.60",
"codelyzer": "~3.0.1",
"jasmine-core": "~2.6.2",
"jasmine-spec-reporter": "~4.1.0",
"karma": "~1.7.0",
"karma-chrome-launcher": "~2.1.1",
"karma-cli": "~1.0.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"karma-coverage-istanbul-reporter": "^1.2.1",
"protractor": "~5.1.2",
"ts-node": "~3.0.4",
"tslint": "~5.3.2",
"typescript": "~2.3.3"
}
}
我的 angular-cli.json
{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"project": {
"name": "asyncpipe"
},
"apps": [
{
"root": "src",
"outDir": "dist",
"assets": [
"assets",
"favicon.ico"
],
"index": "index.html",
"main": "main.ts",
"polyfills": "polyfills.ts",
"test": "test.ts",
"tsconfig": "tsconfig.app.json",
"testTsconfig": "tsconfig.spec.json",
"prefix": "app",
"styles": [
"styles.css"
],
"scripts": [
"../node_modules/hammerjs/hammer.min.js"
],
"environmentSource": "environments/environment.ts",
"environments": {
"dev": "environments/environment.ts",
"prod": "environments/environment.prod.ts"
}
}
],
"e2e": {
"protractor": {
"config": "./protractor.conf.js"
}
},
"lint": [
{
"project": "src/tsconfig.app.json"
},
{
"project": "src/tsconfig.spec.json"
},
{
"project": "e2e/tsconfig.e2e.json"
}
],
"test": {
"karma": {
"config": "./karma.conf.js"
}
},
"defaults": {
"styleExt": "css",
"component": {}
}
}
我已經包含了網絡上提到的所有依賴項。 請幫我解決這個問題。
我認為問題不在於您的代碼。 從您的評論中我看到您的項目依賴項之一 ( @angular/platform-browser
) 有問題。 有一個以角度報告的錯誤: https ://github.com/angular/angular/issues/17400
嘗試將您的依賴項更新為最新版本: 4.2.6
為此,您需要運行以下命令:
npm update
為確保您是最新的,請檢查已安裝軟件包的版本:
npm ls --depth 0
如果您已經通過MaterialModule
導入了所有組件,則也不需要單獨導入每個組件。
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
MaterialModule,
BrowserAnimationsModule,
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
import { MaterialModule } from '@angular/material';
和來自imports: []
的MaterialModule
也是。 它自beta.3
[Changelog]以來已被棄用。
另外,添加NoopAnimationsModule
import {NoopAnimationsModule} from '@angular/platform-browser/animations';
@NgModule({
...
imports: [NoopAnimationsModule],
...
})
我還發現 Github 中列出了您的錯誤問題。 似乎回退到animations
版本4.1.3
是目前的解決方案。
嘗試npm install '@angular/animations"@4.1.3' --save
讓我知道是否有幫助!
更新:
md-menu
沒有顯示,因為它需要一個可以打開菜單的mdMenuTriggerFor
。 在那之前,它一直處於隱藏狀態。 此外,為了使sidenav
正常工作,所有內容都需要位於md-sidenav-container
標簽內。 Sidenav 文檔,菜單文檔。
請使用以下內容更改您的 html 代碼:
<md-sidenav-container style="height: 500px">
<button md-icon-button [mdMenuTriggerFor]="menu">
<md-icon>more_vert</md-icon>Menu
</button>
<md-sidenav opened="true" #sidenav
style="background-color: skyblue">
<button md-raised-button style="margin: 2px 0 0 6px">
Add
</button>
<p>This is Sidenav</p>
</md-sidenav>
<md-menu #menu="mdMenu">
<button md-menu-item (click)="sidenav.open()"> Sidenav </button>
<button md-menu-item> Settings </button>
<button md-menu-item> Help </button>
</md-menu>
</md-sidenav-container>
我遇到過同樣的問題。 我發現 styles.scss 中沒有主題。 我添加了一個預構建的主題和呈現的組件。
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