All files / src/background/methods ObjectKeysTS.ts

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// `keyof any` is short for "string | number | symbol"
// since an object key can be any of those types, our key can too
// in TS 3.0+, putting just "string" raises an error
// since an object key can be any of those types, our key can too
// in TS 3.0+, putting just "string" raises an error
// https://dev.to/kingdaro/indexing-objects-in-typescript-1cgi
export function hasKey<O>(obj: O, key: keyof any): key is keyof O {
    return key in obj
}