jQuery EasyUI Combobox cannot retrieve Chinese input problem

The problem that jQuery EasyUI Combobox cannot retrieve Chinese input, the solution to this problem on the Internet is basically
to write a timer setTimeout in if(..editable){...}, take the input value, and then trigger the display The matching drop-down box data.
This can be displayed normally on IE and Google Chrome. I can't do it in Firefox browser.
For example:
    I input a Chinese character "you". In ie and Google, the timer takes two values, "ni" and "you", which match "you" normally, and the data display is normal. But the input in Firefox is "you", and the timer only takes the value "ni" once, resulting in incorrect data matching.
    To solve this problem, change setTimeout to setInterval.