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angular - Angular Material 不适用于颜色和动画

问题描述

大家好，我正在关注 Max 的 MEAN 堆栈的 Udemy 教程，我遇到了 Material 问题，现在元素没有显示出来。

Material 和 *ngFor 曾经在我让我的电脑进入睡眠状态之前工作。我的设置：Ubuntu，VSCode，节点：10.15.3，npm：6.7.0

这是我的回购

angular-cli 也向我显示了这个警告：

您的全局 Angular CLI 版本 (7.3.6) 高于本地版本 (7.0.7)。使用本地 Angular CLI 版本。

在此处输入图像描述

<mat-accordion>
  <mat-expansion-panel *ngFor="let post of posts">
    <mat-expansion-panel-header>
      {{post.title}}
    </mat-expansion-panel-header>
    <p>{{post.content}}</p>
  </mat-expansion-panel>
</mat-accordion>

包.json

{
  "name": "mean-course",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "~7.0.0",
    "@angular/cdk": "~7.3.5",
    "@angular/common": "~7.0.0",
    "@angular/compiler": "~7.0.0",
    "@angular/core": "~7.0.0",
    "@angular/forms": "~7.0.0",
    "@angular/http": "~7.0.0",
    "@angular/material": "^7.3.5",
    "@angular/platform-browser": "~7.0.0",
    "@angular/platform-browser-dynamic": "~7.0.0",
    "@angular/router": "~7.0.0",
    "core-js": "^2.5.4",
    "rxjs": "~6.3.3",
    "zone.js": "~0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.10.0",
    "@angular/cli": "~7.0.3",
    "@angular/compiler-cli": "~7.0.0",
    "@angular/language-service": "~7.0.0",
    "@types/node": "~8.9.4",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "codelyzer": "~4.5.0",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~3.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~1.1.2",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.11.0",
    "typescript": "~3.1.1"
  }
}

标签： angularangular-materialangular-cli

解决方案

将第 9 行更改为post-list.component.htmlfrom

<p class="info-text mat-body-1" ngIf="posts.length <= 0"> No posts yet!</p>

至

<p class="info-text mat-body-1" *ngIf="posts.length <= 0"> No posts yet!</p>

你错过*了*ngIf.

对于警告，它只是说您全局安装的 @angular/cli ( npm install -g) 比您的 package.json 更大，但它不能成为问题的根源。

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