Function to check two strings and return common words in JavaScript

We are required to write a JavaScript function that takes in two strings as arguments. The function should then check the two strings for common characters and prepare a new string of those characters.

Lastly, the function should return that string.

The code for this will be −

Example

const str1 = "IloveLinux"; const str2 = "weloveNodejs"; const findCommon = (str1 = '', str2 = '') => {    const common = Object.create(null);    let i, j, part;    for (i = 0; i < str1.length - 1; i++) {       for (j = i + 1; j <= str1.length; j++) {          part = str1.slice(i, j);          if (str2.indexOf(part) !== −1) {             common[part] = true;          }       }    }    const commonEl = Object.keys(common);    return commonEl; }; console.log(findCommon(str1, str2));

Output

And the output in the console will be −

[    'l', 'lo', 'lov',    'love', 'o', 'ov',    'ove', 'v', 've',    'e' ]