Question 50852 in Javascript Question posted in
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how to use regex to chech if a single character is a special character – Javascript

I want to check if a single character is special in regex.

let char = "?";
if(condition){
  console.log("The char is a special character");
}
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3

Answers


  1. 0 
    const format = /[!@#$%^&*()_+-=[]{};':"\|,.<>/?]+/;

const checkFormat = (string) => {
    if(format.test(string)){
      return console.log("The char is a special character");
    } else {
      return console.log("No special character");
    }
}
checkFormat('?');
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  2. 0 
    let char = "?";
let condition = /[^a-zA-Z1-4]/g;

if (condition.test(char)) {
    console.log("The char is a special character");
}
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  3. 0

    in a RegExp W represents each special character

    definition : W Matches any character that is not a word character from the basic Latin alphabet. Equivalent to [^A-Za-z0-9_].

    You can find a list of those characters here :

    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_expressions/Character_classes

    const format = /W/g;

const checkFormat = (string) => {
    if(format.test(string)){
      return (`The char "${string}" is a special character`);
    } else {
      return (`The char "${string}" is not a special character`);
    }
}
alert(checkFormat("?"));
alert(checkFormat("n"));
alert(checkFormat("☺️"));
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