@material-ui/core/es/styles/typographyMigration.js

React components that implement Google's Material Design.

const typographyMigration = process.env.NODE_ENV === 'production' ? {} : {
  // these variants will be removed in the next major
  deprecatedVariants: ['display4', 'display3', 'display2', 'display1', 'headline', 'title', 'subheading'],
  // these variants will change appearance in the next major
  // to get the new style use set `useNewVariants` in Typography props
  restyledVariants: ['body1', 'body2', 'caption', 'button'],
  migrationGuideMessage: '\nPlease read the migration guide under https://material-ui.com/style/typography#migration-to-typography-v2'
};
export default typographyMigration;