[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Runtime](./puppeteer.protocol.runtime.md) > [ObjectPreview](./puppeteer.protocol.runtime.objectpreview.md) > [subtype](./puppeteer.protocol.runtime.objectpreview.subtype.md) ## Protocol.Runtime.ObjectPreview.subtype property Object subtype hint. Specified for `object` type values only. Signature: ```typescript subtype?: ('array' | 'null' | 'node' | 'regexp' | 'date' | 'map' | 'set' | 'weakmap' | 'weakset' | 'iterator' | 'generator' | 'error'); ```