Use asterisks in javascript to indicate the implementation code of pre-entered content_jquery

If it is 14, 14 is used before the user enters to imply that the user can enter 14 characters). When the user starts to enter data, the * is replaced one by one. After entering several characters, several * are replaced. After the input is completed, the text box There is only information entered by the user. Just such a function still tortured me for a while. Alas, my JS level is still too bad, so I posted a post for help. Later, with the enthusiastic help of CSDN netizen huangwenquan123, I finally solved the problem. Now I post the code directly. Hope it will be helpful to friends who need this:

Copy code The code is as follows: