AI solution for JavaScript Coding Question on BFE.dev
126. BigDecimal addition

One possible solution using the Big.js library:

function add(a, b) {
  const Big = require('big.js');
  const result = new Big(a).plus(b);
  return result.toString();
}

First, we import the Big.js library. Then we create a new Big object with each input string, and use the plus() method to add them together. Finally, we convert the result back to a string using the toString() method and return it.

Note that Big.js automatically handles trailing zeroes in the result.