How to avoid a double percentage ?

[Anthony31413260hlxw]

Hi, I have this code to bring a percentage automatically after the number :

if (event.value) event.value += "%";

What's the code to make it happen, but only if someone didn't write a percentage themselves in the first place ?

[try67 · Accepted solution]

if (event.value && /%$/.test(event.value)==false) event.value += "%";