function comparePropValues()

in modules/core/src/lifecycle/props.js [134:154]

• 16 lines of code
• 11 McCabe index (conditional complexity)

function comparePropValues(newProp, oldProp, propType) {
  // If prop type has an equal function, invoke it
  let equal = propType && propType.equal;
  if (equal && !equal(newProp, oldProp, propType)) {
    return 'changed deeply';
  }

  if (!equal) {
    // If object has an equals function, invoke it
    equal = newProp && oldProp && newProp.equals;
    if (equal && !equal.call(newProp, oldProp)) {
      return 'changed deeply';
    }
  }

  if (!equal && oldProp !== newProp) {
    return 'changed shallowly';
  }

  return null;
}