Click on these two on the picture, and then
Enter react developer tools in the search box and click "Get" (I have already installed it here, so it is "Delete")
After installation, click the two on the picture to enter the following page
Click "Details"
Check as shown in the figure, at this time F12, enter the debugging page
Click "》" to check if there are Components (this is React), if not, close the browser and re-enter