tailwindcss/src/plugins/gap.js

import createUtilityPlugin from '../util/createUtilityPlugin'
import { flagEnabled } from '../featureFlags'

export default function () {
  return function ({ config, ...args }) {
    if (flagEnabled(config(), 'removeDeprecatedGapUtilities')) {
      createUtilityPlugin('gap', [
        ['gap', ['gridGap', 'gap']],
        ['gap-x', ['gridColumnGap', 'columnGap']],
        ['gap-y', ['gridRowGap', 'rowGap']],
      ])({ config, ...args })
    } else {
      createUtilityPlugin('gap', [
        ['gap', ['gridGap', 'gap']],
        ['col-gap', ['gridColumnGap', 'columnGap']],
        ['gap-x', ['gridColumnGap', 'columnGap']],
        ['row-gap', ['gridRowGap', 'rowGap']],
        ['gap-y', ['gridRowGap', 'rowGap']],
      ])({ config, ...args })
    }
  }
}