# RequestSizeCallback Function

> Callback function for requests expecting a Size object.

- **Product:** DS Server
- **Section:** Reference
- **Kind:** Function
- **Path:** DS Server > Reference > JavaScript API > RequestSizeCallback Function
- **Web URL:** https://docs.textcontrol.com/ds-server/reference/javascript/requestsizecallback/
- **LLMs URL:** https://docs.textcontrol.com/ds-server/reference/javascript/requestsizecallback/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/ds-server/reference/javascript/requestsizecallback/llms-full.txt

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## On This Page

- [Description](https://docs.textcontrol.com/ds-server/reference/javascript/requestsizecallback/#description)
- [Syntax](https://docs.textcontrol.com/ds-server/reference/javascript/requestsizecallback/#syntax)
- [Examples](https://docs.textcontrol.com/ds-server/reference/javascript/requestsizecallback/#examples)

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## Nearby

- **Previous:** [RequestSignerDataCallback Function](https://docs.textcontrol.com/ds-server/reference/javascript/requestsignerdatacallback/llms.txt)
- **Next:** [RequestStatusBarBorderStyleCallback Function](https://docs.textcontrol.com/ds-server/reference/javascript/requeststatusbarborderstylecallback/llms.txt)