# Javascript: TXTextControl.NextIfField.expression1 Property

> Specifies the first expression text that should be compared. This property must be a valid field name.

- **Product:** TX Text Control .NET Server
- **Section:** Reference
- **Kind:** Property
- **Introduced:** 25.0
- **Path:** TX Text Control .NET Server > Reference > JavaScript API > Javascript: TXTextControl.NextIfField.expression1 Property
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol-nextiffield/expression1-property/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol-nextiffield/expression1-property/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol-nextiffield/expression1-property/llms-full.txt

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## On This Page

- [Description](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol-nextiffield/expression1-property/#description)
- [Syntax](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol-nextiffield/expression1-property/#syntax)
- [Examples](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol-nextiffield/expression1-property/#examples)

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- **Previous:** [TXTextControl.NextIfField Object](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol-nextiffield/llms.txt)
- **Next:** [Javascript: TXTextControl.NextIfField.expression2 Property](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol-nextiffield/expression2-property/llms.txt)