Question

我正在运行MEAN Stack网站，尤其是我在前端使用Angular。我最近更新了package.json文件，将@ angular / compiler-cli从“ ^ 7.1.4”更新为“ ^ 8.2.4”。这是我的package.json文件的其余部分：

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 1fr;
}

.grid__inner-content {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

<div class="grid">

<div class="grid__item">
    Stuff 1

    <div class="grid__inner-content">
      <ul class="page-marketing__list">
        <li>Website template design, 1 of 7 templates without a blog</li>
        <li>Hosting 12 months</li>
        <li>12 pages w/form and video</li>
        <li>One monthly email to your list</li>
        <li>1 post a week to Facebook/Instagram pages</li>
      </ul>
      <button>asdf</button>
    </div>
  </div>
  <div class="grid__item">
    Stuff 2

    <div class="grid__inner-content">
      <ul class="page-marketing__list">
        <li>Website template design, 1 of 7 templates without a blog</li>
        <li>Hosting 12 months</li>
        <li>12 pages w/form and video</li>
        <li>One monthly email to your list</li>
        <li>1 post a week to Facebook/Instagram pages</li>
        <li>One content update per month to website and security updates</li>
        <li>$150 a month in Google ad spending</li>
        <li>Get $100 in free advertising when you enroll</li>
        <li>1 monthly written blog for your website</li>
        <li>Ongoing SEO optimizations</li>
      </ul>
      <button>asdf</button>
    </div>
  </div>
</div>

<div style="background: green; padding: 2rem;">Stuff</div>

从那时起，每当我尝试运行ng serve时，我就一直遇到错误。具体来说，我目前遇到的错误是：

{
  "name": "monster-playbook",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "node server.js",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e",
    "postinstall": "ng build --output-path dist"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "~7.1.0",
    "@angular/cli": "^7.1.4",
    "@angular/common": "~7.1.0",
    "@angular/compiler": "~7.1.0",
    "@angular/compiler-cli": "^8.2.4",
    "@angular/core": "~7.1.0",
    "@angular/forms": "~7.1.0",
    "@angular/http": "^7.1.1",
    "@angular/platform-browser": "~7.1.0",
    "@angular/platform-browser-dynamic": "~7.1.0",
    "@angular/router": "~7.1.0",
    "@ng-bootstrap/ng-bootstrap": "^4.0.3",
    "body-parser": "^1.18.3",
    "bootstrap": "^4.0.0-beta",
    "core-js": "^2.5.4",
    "express": "^4.16.4",
    "font-awesome": "^4.7.0",
    "mongodb": "^3.1.13",
    "rxjs": "~6.3.3",
    "tslib": "^1.9.0",
    "zone.js": "~0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "^0.12.4",
    "@angular/language-service": "~7.1.0",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~8.9.4",
    "codelyzer": "~4.5.0",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "^4.3.0",
    "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": "^3.5.3"
  }
}

我已经尝试还原更改并重新运行npm install，但这并没有帮助。我也

Answer 1

我升级到Angular 8，需要将打字稿更新为3.4，才能克服此错误。

Ng Serve返回“对象原型只能是对象或null：未定义TypeError：对象原型只能是对象或null：未定义”

1 个答案: