JS delete substring in string

const removeString = (string, separator) => {
   // We split the string without delimiters 
   const separatedArray = string.split(separator);
   // We use an empty string to splittedArray Join in 
   const separatedString = separatedArray.join("");
   return separatedString;
}
const str = removeString('this-is-a-sting', '-');
console.log(str);