replaceEqualDeep

function replaceEqualDeep<T>(
   a: unknown, 
   b: T, 
   depth?: number): T;

Defined in: packages/query-core/src/utils.ts:388

This function returns a if b is deeply equal. If not, it will replace any deeply equal children of b with those of a. This can be used for structural sharing between JSON values for example.

Type Parameters

T

T

Parameters

a

unknown

The previous value, whose deeply equal parts are reused.

b

T

The new value.

depth?

number

The current recursion depth. Past a depth of 500, b is returned as is.

Returns

T

a if b is deeply equal to it, otherwise b with its deeply equal parts replaced by those of a.