V2EX = way to explore V2EX 是一个关于分享和探索的地方
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This topic created in 1920 days ago, the information mentioned may be changed or developed.
在看源码的时候发现下面这种写法，不明白是什么意思，请教一下各位：
const temp: ToughCookieFileStore = { [domain]: { [path]: { [name]: { key: name, value: etcCookie.value, expires, domain, path, secure: etcCookie.secure, httpOnly: etcCookie.httpOnly, hostOnly: etcCookie.hostOnly, }, }, }, }; 下面是接口的声明
export interface ToughCookieFileStore { [site: string]: TCFSPaths; } export interface TCFSPaths { [site: string]: TCFSCookies; } export interface TCFSCookies { [cookieName: string]: TCFSCookieAttributes; } export interface TCFSCookieAttributes { key: string; value: string; expires?: string; maxAge?: number; domain: string; path: string; secure?: boolean; httpOnly?: boolean; extensions?: string[]; hostOnly: boolean; creation?: string; lastAccessed?: string; } 5 replies 2021-01-25 13:59:56 +08:00
 | 2 noe132 Jan 22, 2021 via Android domain 是变量，用 domain 的值做 key 。方括号内可以是任意表达式 https://developer.mozilla.org/en-US/docs/Web/Javascript/Reference/Operators/Object_initializer 不要被 ts 骗了，这是 js 的语法 |
 | 3 alexkuang Jan 22, 2021 via iPhone 方括号里是对象的动态键名，es6 语法跟 ts 无关 |
 | 4 bearboss Jan 22, 2021 索引签名，外面两层实际上并没有什么限制，可以设置任意的字符串作为属性，最后这层才需要符合 TCFSCookieAttributes 的定义 |
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