javascript - Why is it that the input box in the project suddenly cannot input text? There is a cursor and the text cannot go up when typing on the keyboard. Can any expert encounter such a problem and ask for a solution?

Question

Why is it that the input box in the project suddenly cannot input text? There is a cursor and the text cannot go up when typing on the keyboard. Who has encountered such a problem and can you please solve it

Answer 1

Either it crashes, or the input box is restricted.

Answer 2

Maybe your keyboard is broken

Answer 3

Generally, in this case, your input box should be restricted. Take a look at your onchange method

Answer 4

Write a retrun false in the keydown event, you are cheating yourself