我使用打字稿2.2.1目标枚举ES5字符串转换为在打字稿
我有这样几个枚举下面
enum PermissionLevel {
ACCOUNT_OWN,
ACCOUNT_OTHER,
USER_OWN
}
enum Permission {
ACCOUNT_CREATE,
USER_CREATE
}
我有一个输入JSON如下
{
"ACCOUNT_OWN": [
"USER_CREATE",
"ACCOUNT_CREATE"
],
"ACCOUNT_OTHER": [
"USER_CREATE"
]
}
我想存储这个输入为Map<Permission, Array<PermissionLevel>>
以下是我的代码
// assume authJson is the input and is a valid JSON.
this.userPermissions = new Map<Permission, Array<PermissionLevel>>();
for (let [level, permissions] of Object.entries(authJson)) {
let newLevel: PermissionLevel = <any>PermissionLevel[level];
for (let perm of permissions) {
let newPermission: Permission = <any>Permission[perm];
if (this.userPermissions.get(newPermission)) {
this.userPermissions.set(newPermission, this.userPermissions.get(newPermission).concat(newLevel));
} else {
this.userPermissions.set(newPermission, new Array<PermissionLevel>().concat(newLevel));
}
}
}
console.log(JSON.stringify(this.userPermissions));
最后一条语句的输出为空:(。不知道我在这里做错了什么。
更新:我刚刚发现下面
EXCEPTION: Uncaught (in promise): ReferenceError: PermissionLevel is not defined
有运行时错误行这里是一个TS小提琴 - 在JavaScript https://jsfiddle.net/hrwyc6zv/1/
你能分享你生成的JS代码? – amiramw
只能使用点符号访问枚举值。枚举在运行时作为对象生成。但是这个名字不是你TS代码中的名字。它被生成。 – amiramw
@amiramw真的,我忘了那 – Hydro