VS Code Set code auto save

open file --> Preferences --> Set up window

Here's the picture , stay file Tab to find Auto Save Options , choice afterDelay . You can also choose other options .

The meaning of the option is

1） default setting  off , Do not save automatically ;
2）afterDelay ——  Will be configured in  >"#files.autoSaveDelay#"  Automatically save as a saved editor ;
3）onFocusChange ——  When the editor loses focus ,> Automatically save as saved editor 
 （ The mouse is not there  VSCode  In time ）;
4）onWindowChange ——  When the window loses focus ,> Automatically save as saved editor 
（ Windows can be understood as every code script , When mouse comes from  A  Script > go to  B  Script time , Auto save script  A  Modification of ）