Only accept specific numbers in an input

Question

Only accept specific numbers in an input

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#1 by (2 votes)

0

I have the following input:

Conta Despesa: 
<input type="number" name="cod_reduzido">

But it should accept only specific numbers (there are 30 numbers that are not in sequence, such as: 3111, 3113, 3130, etc.)

javascript html5

asked by anonymous 26.12.2017 / 17:39

1 answer

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score 2 · Accepted Answer

It does not make sense for your input type to be number (with the behavior of the arrows to increment and decrement being that you are not using sequence.) So I switched to type="text" , however I added a parameter called pattern that validates the your input through a RegExp .

As your case is specific with numbers without some logic to each other, you will need to write the RegExpna nail itself! Here is an example of the 3 numbers you have just added the rest separated by | (OR).

Conta Despesa: 
<input type="text" name="cod_reduzido" pattern="3111|3113|3130">
<input type="submit" value="validar">