1. First download the devtools source code on github, address: https://github.com/vuejs/vue-devtools
2. Then enter vue-devtools, npm install to download dependencies, and then execute npm run build to compile the source program
3. Modify persistent in mainifest.json in chrome in the shells directory to true
4. Open the extension in Google Chrome
5. Drag and drop the entire chrome folder in the shells directory of the just compiled project directly into the current browser, and select Enable to install the plug-in to the browser.
6. Start the vue project to view