| 1 | /**
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| 2 | * Returns true if the passed value is "plain" object, i.e. an object whose
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| 3 | * prototype is the root `Object.prototype`. This includes objects created
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| 4 | * using object literals, but not for instance for class instances.
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| 5 | *
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| 6 | * @param {any} value The value to inspect.
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| 7 | * @returns {boolean} True if the argument appears to be a plain object.
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| 8 | *
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| 9 | * @public
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| 10 | */
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| 11 | export default function isPlainObject(value: unknown): value is object {
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| 12 | if (typeof value !== 'object' || value === null) return false
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| 13 |
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| 14 | let proto = Object.getPrototypeOf(value)
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| 15 | if (proto === null) return true
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| 16 |
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| 17 | let baseProto = proto
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| 18 | while (Object.getPrototypeOf(baseProto) !== null) {
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| 19 | baseProto = Object.getPrototypeOf(baseProto)
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| 20 | }
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| 21 |
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| 22 | return proto === baseProto
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| 23 | }
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