JSFiddle - React, Tailwind, and code Playground
JavaScript
array1 = [{event_id:11,raw: 3, num:1},{id:11, num:1}, {id:11, num:1}, {id:11, num:1}, {id:11, num:1}, {id:11, num:1}, {id:11, num:1}]
wanted = ["1~3", "6~7", "9", "25~27", "30"] //これが欲しい。続き番号は~をつけてまとめて表示される。