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deep.ts
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deep.ts
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/**
* Make interfaces acceptable in `Record` type arguments.
*/
export type Opt<T> = Partial<Record<keyof T, unknown>>;
function hasObject(data:Record<string | number | symbol, unknown>, key:string){
return Object.hasOwn(data, key) && typeof data[key] === "object" && data[key] !== null;
}
/**
* Applies `Object.freeze()` recursively.
* @example
* ```ts
* const freeze = deepFreeze({
* aaa: {
* bbb: true
* }
* });
* ```
*/
export function deepFreeze<T extends Opt<T>>(data:T):T{
Object.freeze(data);
for(const key in data){
if(hasObject(data, key) && !Object.isFrozen(data[key])){
deepFreeze(data[key]);
}
}
return data;
}
/**
* Applies `Object.seal()` recursively.
* @example
* ```ts
* const seal = deepSeal({
* aaa: {
* bbb: true
* }
* });
* ```
*/
export function deepSeal<T extends Opt<T>>(data:T):T{
Object.seal(data);
for(const key in data){
if(hasObject(data, key) && !Object.isSealed(data[key])){
deepSeal(data[key]);
}
}
return data;
}