How to solve the problem that vue-cli-service is not an internal or external command

Causes and solutions: 1. The project did not execute "npm install" and the relevant dependency packages could not be found; just execute "npm install". 2. The project's dependency package is damaged; you need to delete the node_modules folder first, and then execute the "npm install" command to reinstall it.

The operating environment of this tutorial: windows7 system, vue2.9 version, Dell G3 computer.

vue-cli-service is not an internal or external command

Cause 1. The newly pulled project did not execute npm install. The relevant dependency package cannot be found (that is, there is no node_modules folder). Solution: Execute npm install

Cause 2. The project's dependency package is damaged. Solution: Delete the node_modules folder, execute npm install and reinstall

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