JSFiddle - React, Tailwind, and code Playground

JavaScript

case type.CLICK_AT_PLAYLIST_ITEM:
      state.videos.map(video => {
        if (video.id === action.id) {
          state.playedVideo = video.src;
          video.active = true
        } else {
          video.active = false
        }
      });
      return Object.assign({}, state);