We are required to write a JavaScript function that takes in two strings that may / may not contain some common elements. The function should return an empty string if no common element exists otherwise a string containing all common elements between two strings.
Following are our two strings −
const str1 = 'Hey There!!, how are you'; const str2 = 'Can this be a special string';
Example
Following is the code −
const str1 = 'Hey There!!, how are you'; const str2 = 'Can this be a special string'; const commonString = (str1, str2) => { let res = ''; for(let i = 0; i < str1.length; i++){ if(!str2.includes(str1[i])){ continue; }; res += str1[i]; }; return res; }; console.log(commonString(str1, str2));
Output
Following is the output in the console −
e here h are