Question

How to check if a string contains only letters, numbers, underscores and dashes in TypeScript

Answer 1

function isValidString(s: string): boolean {
    const pattern: RegExp = /^[A-Za-z0-9_-]*$/;
    
    return pattern.test(s);
}

const s1 = "-abc_123-";
console.log(isValidString(s1) ? "yes" : "no");

const s2 = "-abc_123-(!)";
console.log(isValidString(s2) ? "yes" : "no");

  
  
/*
run:
      
"yes" 
"no" 

*/
 

 

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