this is how I used to add error prompts at home if the code went wrong. The browser will print it on the screen. But now this method of writing does not respond to the configuration in the company. I don"t know why 
this is how I used to add error prompts at home if the code went wrong. The browser will print it on the screen. But now this method of writing does not respond to the configuration in the company. I don"t know why