![](/img/trans.png)
[英]Unhandled Rejection (TypeError): Invalid attempt to spread non-iterable instance
[英]Unhandled Rejection (TypeError): Invalid attempt to spread non-iterable instance how can I fix
我在我的項目中遇到這樣的錯誤:
未處理的拒絕(TypeError):傳播不可迭代實例的嘗試無效。 為了可迭代,非數組對象必須有一個 Symbol.iterator 方法
這是我的 SortContracts.ts 代碼:
function sortContracts(
contracts: ContractUsage[],
sortField?: SortType,
sortDirection?: SortDirection
): any[] {
let sortFunction:any
switch (sortField) {
// Sort by End Date
case SortType.DATE_SORT:
if (sortDirection === SortDirection.ASC) {
// Sort by End Date ASC
sortFunction = (a:any, b:any) => endDateSortAscFunc(a, b);
} else {
// Sort by End Date DESC
sortFunction = (a:any, b:any) => endDateSortDescFunc(a, b);
}
break;
// Sort by ContractID
case SortType.CONTRACT_SORT:
if (sortDirection === SortDirection.ASC) {
// Sort by ContractID ASC
sortFunction = (a:any, b:any) => contractIdSortAscFunc(a, b);
} else {
// Sort by ContractID DESC
sortFunction = (a:any, b:any) => contractIdSortDescFunc(a, b);
}
break;
case SortType.USAGE_ORDER:
if (sortDirection === SortDirection.ASC) {
sortFunction = (a:any, b:any) => usageOrderSortAscFunc(a, b);
} else {
sortFunction = (a:any, b:any) => usageOrderSortDescFunc(a, b);
}
break;
// default sort
default:
sortFunction = (a:any, b:any) => contractIdSortAscFunc(a, b);
}
// Return the sorted contracts
console.log('contract here: ', [...contracts].sort(sortFunction))
return [...contracts].sort(sortFunction);
}
您試圖傳播的變量(即[...contracts]
)不是iterable 。 如果你想使用這個運算符, 你需要有這個變量 iterable 。 檢查變量是否真的是一個數組(或任何其他可迭代類型),並且它不是 null 或 undefined 。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.