标签: angular8

I updated my angular to v9 and when I try to go back in v8, I receive this error. I have already tried the following:

• uninstall -global angular/cli
• uninstall angular/cli
• go back to my last package.json
• delete node_module folder
• delete repo

This error continues to show.

My stacktrace is :

An unhandled exception occurred: Job name "..getProjectMetadata" does not exist.
See angular-errors.log for further details.

angular-errors.log :

[error] Error: Job name "..getProjectMetadata" does not exist.
    at Observable._subscribe (/Front/node_modules/@angular-devkit/core/src/experimental/jobs/simple-scheduler.js:350:23)
    at Observable._trySubscribe …

我应该如何配置新的Angular 8视图子级？

@ViewChild('searchText', {read: ElementRef, static: false})
public searchTextInput: ElementRef;

与

@ViewChild('searchText', {read: ElementRef, static: true})
public searchTextInput: ElementRef;

哪个更好？什么时候应该使用static:truevs static:false？

我有一个JSON如下所示的文件:

{

  "primaryBright":    "#2DC6FB",
  "primaryMain":      "#05B4F0",
  "primaryDarker":    "#04A1D7",
  "primaryDarkest":   "#048FBE",

  "secondaryBright":  "#4CD2C0",
  "secondaryMain":    "#00BFA5",
  "secondaryDarker":  "#009884",
  "secondaryDarkest": "#007F6E",

  "tertiaryMain":     "#FA555A",
  "tertiaryDarker":   "#F93C42",
  "tertiaryDarkest":  "#F9232A",

  "darkGrey":         "#333333",
  "lightGrey":        "#777777"
}

我正在尝试将其导入到.tsx文件中.为此,我将其添加到类型定义中:

declare module "*.json" {
  const value: any;
  export default value;
}

而我正在这样导入它.

import colors = require('../colors.json')

该文件中,我使用的颜色primaryMain作为colors.primaryMain.但是我得到一个错误 - JSON

我究竟做错了什么？

当我将Angular从7更新到Angular 8时，出现延迟加载模块错误

我尝试了角度升级指南中提供的选项

进行了以下更改：

之前

    loadChildren: '../feature/path/sample- 
                         tage.module#SameTagModule'

后

   loadChildren: () => import('../feature/path/sample- 
                      tags.module').then(m => m.CreateLinksModule)

错误TS1323：仅当'--module'标志为'commonjs'或'esNext'时，才支持动态导入。

我正面临一个异常ng build（为差异加载生成 ES5 包......）

An unhandled exception occured: Call retires were exceeded

使用过的版本：

• 角CLI： 8.3.20
• 角度： 8.2.7
• 节点： 12.12.1

同样在日志中，它被提到

[error] Error: Call retries were exceeded at ChildProcessWorker.initialize

当我使用Angular CLI（8.0.0）生成项目时，运行ng serve，在Internet Explorer中打开应用程序，然后出现空白屏幕。

我看了看polyfills.ts文件，并取消了以下几行的注释：

    import 'classlist.js';
    import 'web-animations-js';

我也删除了所有core.js导入，因为Angular 8直接支持core.js 3.0。

我也跑了npm i。

package.json：

"dependencies": {
    "@angular/animations": "~8.0.0",
    "@angular/common": "~8.0.0",
    "@angular/compiler": "~8.0.0",
    "@angular/core": "~8.0.0",
    "@angular/forms": "~8.0.0",
    "@angular/platform-browser": "~8.0.0",
    "@angular/platform-browser-dynamic": "~8.0.0",
    "@angular/router": "~8.0.0",
    "classlist.js": "^1.1.20150312",
    "rxjs": "~6.4.0",
    "tslib": "^1.9.0",
    "web-animations-js": "^2.3.1",
    "zone.js": "~0.9.1"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.800.0",
    "@angular/cli": "~8.0.0",
    "@angular/compiler-cli": "~8.0.0",
    "@angular/language-service": "~8.0.0",
    "@types/node": "~8.9.4",
    "@types/jasmine": "~3.3.8",
    "@types/jasminewd2": "~2.0.3",
    "codelyzer": "^5.0.0",
    "jasmine-core": "~3.4.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~4.1.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~2.0.1", …

我已经将一个 Angular 项目从版本 7 更新到了 8。一切运行顺利，原理图完成了它的工作（也许），我们还好（项目甚至在生产中）。当我们更新 Angular CLI 时，我们总是会生成一个新项目来查看真正的差异并从中学习，例如新的依赖项、配置等。

使用 Angular CLI 8.0.4 生成新的 Angular 项目时，新应用程序没有core-js依赖项：

"dependencies": {
    "@angular/animations": "~8.0.1",
    "@angular/common": "~8.0.1",
    "@angular/compiler": "~8.0.1",
    "@angular/core": "~8.0.1",
    "@angular/forms": "~8.0.1",
    "@angular/platform-browser": "~8.0.1",
    "@angular/platform-browser-dynamic": "~8.0.1",
    "@angular/router": "~8.0.1",
    "rxjs": "~6.4.0",
    "tslib": "^1.9.0",
    "zone.js": "~0.9.1"
  }

core-js不存在对构建项目的分析包： 在我使用 Angular CLI 更新的旧项目中，core-js是否存在并且存在于最终包中：

"dependencies": {
    "@angular/animations": "~8.0.3",
    "@angular/cdk": "~8.0.1",
    "@angular/common": "~8.0.3",
    "@angular/compiler": "~8.0.3",
    "@angular/core": "~8.0.3",
    "@angular/forms": "~8.0.3",
    "@angular/platform-browser": "~8.0.3",
    "@angular/platform-browser-dynamic": "~8.0.3",
    "@angular/router": "~8.0.3",
    "@auth0/angular-jwt": "2.1.1",
    "@hackages/ngxerrors": "~8.0.0",
    "@ng-bootstrap/ng-bootstrap": "5.0.0-rc.1",
    "@ngx-loading-bar/core": …

我正在使用ViewChild，如下所示：

@ViewChild("InternalMedia") localStream;
@ViewChild("emoji") mEmoji;

一直工作到angular-7.x

我将其升级到angular-8.x后，就开始出现以下错误

.../call_emoji/component.ts(41,4): error TS2554: Expected 2 arguments, but got 1.

我检查了https://angular.io/api/core/ViewChild，并将其更改为

@ViewChild("InternalMedia",{static:false}) remoteStream;

有用。我没有得到什么静态效果，像以前一样工作应该有什么价值？

将 Angular 8 项目更新为 Angular 9 时，出现错误

\xe2\x9c\x94 Package successfully installed.\nUsing package manager: 'npm'\nCollecting installed dependencies...\nFound 0 dependencies.\nPackage '@angular/core' is not a dependency.\n

我使用的命令

ng update @angular/core@9 @angular/cli@9 --force\n

错误

储存库不干净。请先提交或存储任何更改，然后再进行更新

当我从版本7更新到Angular 8时。

Angular升级指南https://update.angular.io/#7.0:8.0

  D:\app-test> ng update @angular/cli @angular/core
               npm cache verify

储存库不干净。请在更新之前提交或存储任何更改。

更新版本

    PS D:\app-test> ng update
                Using package manager: 'npm'
                Collecting installed dependencies...
                Found 58 dependencies.
                    We analyzed your package.json, there are some packages to update:

                      Name                               Version                  Command to update
                     --------------------------------------------------------------------------------
                      @angular/cdk                       7.2.2 -> 8.0.1           ng update @angular/cdk
                      @angular/core                      7.2.15 -> 8.0.1          ng update @angular/core
                      @angular/core                      7.2.2 -> 7.2.15          ng update @angular/core
                      @angular/material                  7.3.7 -> 8.0.1           ng update @angular/material
                      rxjs                               6.3.3 -> 6.5.2           ng update …