What is regex to validate only points, numbers and commas?

Question

What is the regex to validate only points, numbers and commas?

Answer 1

Would this be:

^[\d,.?!]+$

• The ^ check from the beginning
• The $ Czech from the end
• The \d czech numbers
• Anything inside of [...] will be considered, regardless of position, then can remove ? and ! if desired, as I did not know which points I wanted to add both

Javascript

Of course this will only test the string and in case your validator gives to understand that this is what you want, if you want to use with Javascript can do something like this:

function validar() {
    var meucampo1 = document.getElementById("meu-campo-1");
    var valido = /^[\d,.?!]+$/.test(meucampo1.value);
    
    alert(valido ? "Validou" : "Não validou");
}

Digite algo no campo e aperte em validar:
<input type="text" id="meu-campo-1">
<button onclick="validar()">Validar</button>

HTML5 validation

If you’re going to use the pattern="..." can apply like this:

<form action="" name="form1">
    Digite algo no campo e aperte em validar:
    <input value="" pattern="[\d,.?!]*" title="Please enter allowed characters only.">
    <button>Validar</button> 
</form>

Answer 2

Would that be:

(?:\.|,|[0-9])*

Explanation:

• \. - Dot.

• , - Comma.

• [0-9] - Numbers.

• | - Indicates choice.

• \.|,|[0-9] - Choose between a semicolon or numbers.

• (?: ... ) - Grouping without capture.

• * - Group repetition.

• (?:\.|,|[0-9])* - A repetition of dots, commas and numbers.