app/assets/javascripts/vue_shared/components/diff_viewer/utils.js


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import { RENAMED_DIFF_TRANSITIONS } from '~/diffs/constants';

export const transition = (currentState, transitionEvent) => {
  const key = `${currentState}:${transitionEvent}`;

  if (RENAMED_DIFF_TRANSITIONS[key]) {
    return RENAMED_DIFF_TRANSITIONS[key];
  }

  return currentState;
};