How to Change (Upgrade or Downgrade) Angular version?

问题

I have recently installed Angular 6 and would like to go back to using Angular 5.2 How can I change my Angular version from whatever version I have to whichever one I choose?

Answer: The version of angular used in a project is determined by the version of angular cli installed. any specific version of angular cli can be installed with the following command:

npm install --global @angular/cli@x.x.x.

example:

npm install --global @angular/cli@1.6.6

even if you have another version of angular cli (either newer or older) installed that won't cause issues.

回答1:

First you need to uninstall, install the cli

npm uninstall -g angular-cli
npm cache clean
npm install -g angular-cli@1.6.1

After this, delete node_modules directory

Then change your package versions in package.json to have versions like the following

{
  ...
  },
  ...
  "dependencies": {
    "@angular/animations": "5.2.2",
    "@angular/cdk": "^5.2.2",
    "@angular/common": "5.2.2",
    "@angular/compiler": "5.2.2",
    "@angular/core": "5.2.2",
    "@angular/forms": "5.2.2",
    "@angular/http": "5.2.2",
    "@angular/material": "^5.2.2",
    "@angular/platform-browser": "5.2.2",
    "@angular/platform-browser-dynamic": "5.2.2",
    "@angular/router": "5.2.2",
    "@ngrx/core": "^1.2.0",
    "@ngrx/store": "^4.0.3",
    "core-js": "^2.5.1",
    "hammerjs": "^2.0.8",
    "rxjs": "^5.5.2",
    "typescript": "^2.4.2",
    "web-animations-js": "^2.3.1",
    "zone.js": "^0.8.18"
  },
  "devDependencies": {
    "@angular/cli": "1.6.1",
    "@angular/compiler-cli": "5.2.2",
    "@angular/language-service": "5.2.2",
    "@types/jasmine": "~2.5.53",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    ...
  }
}

and install packages

npm install

回答2:

I will try to give a general answer for futere similar issues.

The version of angular used in a project is determined by the version of angular cli installed. any specific version of angular cli can be installed with the following command:

npm install --global @angular/cli@x.x.x.

example:

npm install --global @angular/cli@1.6.6

even if you have another version of angular cli (either newer or older) installed. That should not cause issues. however to be sure you can use:

npm uninstall -g angular-cli

npm cache clean

npm install -g angular-cli@1.6.1

来源：https://stackoverflow.com/questions/50415235/how-to-change-upgrade-or-downgrade-angular-version

标签

angular