@greensight/gds/emotion/cjs/fastEquals.js

Greensight Design System

var _rollupPluginBabelHelpers = require('./_rollupPluginBabelHelpers-mkWCC7yp.js');

function fastEquals(a, b) {
  // If both are the same object/reference or same primitive value
  if (a === b) return true;

  // If they are not the same type
  if (_rollupPluginBabelHelpers._typeof(a) !== _rollupPluginBabelHelpers._typeof(b)) return false;

  // If they are objects
  if (_rollupPluginBabelHelpers._typeof(a) === 'object') {
    // If they are not the same class (Array, Object)
    if (Object.getPrototypeOf(a) !== Object.getPrototypeOf(b)) return false;

    // If they are arrays, compare each element
    if (Array.isArray(a)) {
      if (a.length !== b.length) return false;
      for (var i = 0; i < a.length; i++) {
        if (!fastEquals(a[i], b[i])) return false;
      }
      return true;
    }

    // If they are objects, compare each key
    var keys = Object.keys(a);
    if (keys.length !== Object.keys(b).length) return false;
    for (var _i = 0, _keys = keys; _i < _keys.length; _i++) {
      var key = _keys[_i];
      // eslint-disable-next-line no-prototype-builtins
      if (!b.hasOwnProperty(key)) return false;
      if (!fastEquals(a[key], b[key])) return false;
    }
    return true;
  }

  // If they are not the same primitive value
  return false;
}

exports.fastEquals = fastEquals;