How to avoid a double percentage ?

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 ?

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Correct answer try67

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

Correct answer

Community Expert

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

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