predictype

predictype v0.13.0

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predictype / predicates/objects / objectPrototypeRelation

Function: objectPrototypeRelation()

objectPrototypeRelation(source, oper, proto): boolean

Defined in: predicates/objects/objectPrototypeRelation.ts:26

Checks prototype relation between objects (contains_prototype, is_prototype_of).

Parameters

source

object

The object to check.

oper

ObjectPrototypeRelationOper

The prototype relation operation to perform (e.g. ‘contains_prototype’, ‘is_prototype_of’).

proto

any

The prototype to compare against.

Returns

boolean

True if the relation check is valid according to the operator, otherwise false.

Throws

If the operation is not recognized.

Example

const proto = { kind: 'base' };
const source = Object.create(proto);
const target = Object.create(source);

objectPrototypeRelation(source, 'contains_prototype', proto); // true
objectPrototypeRelation(source, 'is_prototype_of', target); // true

Remarks

Supported Operators:

• contains_prototype: object prototype is the given prototype
• is_prototype_of: object is prototype of the given value

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