npm install bracket-balance --save

const bracketBalance = require('bracket-balance');
let exampleString = '{hello{{ ]}';

bracketBalance(exampleString, '{}');
//returns 2 because there are 2 more opening than closing brackets

1. String to search through
2. String containing a pair of brackets ('{}', '()' or '[]')

Number representing the difference between opening and closing brackets

• bigger than 0 means there are more opening than closing brackets
• exactly 0 means that there is an closing one for each opening bracket
• smaller than 0 means there are more closing than opening brackets