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github.com/loopbackio/loopback-next/tree/master/docs

loopbackio/loopback-next

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--- lang: en title: 'API docs: metadata.metadatainspector.getdesigntypeforproperty' keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI sidebar: lb4_sidebar editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/metadata permalink: /doc/en/lb4/apidocs.metadata.metadatainspector.getdesigntypeforproperty.html --- <!-- Do not edit this file. It is automatically generated by API Documenter. --> [Home](./index.md) &gt; [@loopback/metadata](./metadata.md) &gt; [MetadataInspector](./metadata.metadatainspector.md) &gt; [getDesignTypeForProperty](./metadata.metadatainspector.getdesigntypeforproperty.md) ## MetadataInspector.getDesignTypeForProperty() method Get TypeScript design time type for a property **Signature:** ```typescript static getDesignTypeForProperty(target: Object, propertyName: string): Function | undefined; ``` ## Parameters <table><thead><tr><th> Parameter </th><th> Type </th><th> Description </th></tr></thead> <tbody><tr><td markdown="1"> target </td><td markdown="1"> Object </td><td markdown="1"> Class or prototype </td></tr> <tr><td markdown="1"> propertyName </td><td markdown="1"> string </td><td markdown="1"> Property name </td></tr> </tbody></table> **Returns:** Function \| undefined Design time metadata. The return value is `undefined` when: - The property has type `undefined`<!-- -->, `null` - The TypeScript project has not enabled the compiler option `emitDecoratorMetadata`<!-- -->. - The code is written in vanilla JavaScript.