Jay*_*esh 5 typescript ionic-framework angular
您好,我想推送 TypeScript 中现有的新键值对,我尝试了以下步骤,但没有发生任何情况,也没有错误,请帮助
profile = {"RouteID":"B76F77922EF83A4EE04024921F591A6F","Name":"3019998FALCON","rName":"KILGORE REMOVED"}
let newvalue = "jzket"
profile["userID"] = newvalue
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您问题中的代码基本上是正确的,这是一个完整的工作示例:
const profile = {
"RouteID": "B76F77922EF83A4EE04024921F591A6F",
"Name": "3019998FALCON",
"rName": "KILGORE REMOVED"
}
profile["userID"] = "jzket";
// Works everywhere
console.log(profile["userID"]);
// Works, but violates the type information available here
console.log(profile.userID);
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您会注意到类型系统会抱怨后一种用法,因为userID它不是为 推断的类型的一部分profile。
您可以继续使用第一个示例 ( profile['userID']) 或提供更多类型信息:
interface Profile {
RouteID: string;
Name: string;
rName: string;
userID?: string;
}
const profile: Profile = {
"RouteID": "B76F77922EF83A4EE04024921F591A6F",
"Name": "3019998FALCON",
"rName": "KILGORE REMOVED"
}
profile["userID"] = "jzket";
// Works everywhere
console.log(profile["userID"]);
// Works, but violates the type information available here
console.log(profile.userID);
Run Code Online (Sandbox Code Playgroud)
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