How to Check if a String has the same characters in JavaScript?

Question

Let say I've String

var str = 'Sumur Bandung'

and

var x = 'Kecamatan Sumur Bandung'

from str and x there are two matching characters Sumur and Bandung . How can I check that str has characters that match with x ?

Answer 1

let str = "Sumur Bandung";
let x = "Kecamatan Sumur Bandung";

function stringContains(parentString, childString) {
  const parentStringSeparator = parentString.split(" ");
  return childString
  .split(" ")
  .every((word) => parentStringSeparator.includes(word));
}

console.log(stringContains(x, str));

If I understand you correctly, this is what you're asking. Given a parent string separated by spaces, check if every word of a child string is in the parent string.

Edit: This function doesn't take in account word order and splits every string with spaces.

Edit2: If you're trying to ask whether a child string contains at least one word from a parent string, you should use some instead of every:

let str = "Sumur Bandung";
let x = "Kecamatan Sumur Bandung";

function stringContains(parentString, childString) {
  const parentStringSeparator = parentString.split(" ");
  return childString
  .split(" ")
  .some((word) => parentStringSeparator.includes(word));
}

console.log(stringContains(x, str));

Answer 2

You can use " include ", it's the best.

 var x = 'Kecamatan Sumur Bandung' var str = 'Sumur Bandung' console.log(x.includes(str) || str.includes(x))