( async () => { const web = _spPageContextInfo . webAbsoluteUrl ; const EMPTY_LISTS_FIRST = false ; const SKIP_EXISTING_ITEMS = true ; // ---- load JSON via file picker ---- const data = await new Promise (( resolve , reject ) => { const input = document . createElement ( " input " ); input .
Source: [Dev.to](https://dev.to/yili_zhang_flow/sharepoint-list-study-20260800-46o6)