Main function: Vue official development and debugging tool `vue devtools`: the tool can realize basic monitoring of **Vue** functions by the browser in the **development environment**
Download address: https://crxdl.com/
installation steps:
1. Enter vue to find version 6.2.0
2. Click on the historical version-download version 6.2.1
3. Unzip the downloaded installation package
4. Drag and drop the decompressed file into the Google Chrome extension.
5. Click on two places
5. Restart the browser. If the following two types of vue appear, it means the addition is successful.
