Sorting your imports in a JS file has a lot of benefits. First at all makes it easier to see what you imported from specific packages, also if you group them, you can easily distinguish which imports are from third party packages or local imports.
The rule of thumb is to keep the import order like this:
Built-in
External
Internal
import React from 'react';
import { PropTypes } from 'prop-types';
import MentorCard from 'components/MentorCard';
import pladeholderImage from '../../assets/images/placholder.png';
import colors from '../../styles/colors';