Q: How do you handle pasting more characters than OTP inputs in JavaScript?

Check if index + i < inputs.length before filling each input: if (index + i < inputs.length) inputs[index + i].value = char. Extra characters are ignored. Focus the last input: Math.min(index + pasted.length, inputs.length - 1).

Question 1

Where should the paste fill start in an OTP input?

Accepted Answer

From the current focused input's index, not always from the first. If the user pastes into the third input, fill from index 2: inputs[index + i].value = char. This matches user expectation.

Question 2

How do you implement paste support in an OTP input component?

Accepted Answer

Listen for the paste event, prevent default, get the pasted text from clipboardData, filter to numeric only with replace(/\D/g, ''), split into characters, and fill each input starting from the current index. Focus the last filled input and check completion.

Question 3

Why do you need preventDefault for paste in an OTP input?

Accepted Answer

Because the default paste would fill only the current input with the entire pasted string (which exceeds maxlength=1, so only the first character is kept). preventDefault lets you control how the pasted text is distributed across the inputs.

Question 4

How do you handle pasting more characters than OTP inputs in JavaScript?

Accepted Answer

Check if index + i < inputs.length before filling each input: if (index + i < inputs.length) inputs[index + i].value = char. Extra characters are ignored. Focus the last input: Math.min(index + pasted.length, inputs.length - 1).

Where should the paste fill start in an OTP input?

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