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title: Value Changed node
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# Value Changed

This node sends a <span className="ndl-signal">signal</span> when the input value changes.

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![](/nodes/logic/value-changed/valuechanged_node.png)

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The <span className="ndl-node">Value Changed</span> node is useful to trigger actions in your web app based on changes in your data.

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## Inputs

| Data                                    | Description                                                                                                                                  |
| --------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------- |
| <span className="ndl-data">Input</span> | <##input:input##>The value that this node should observe. When this value changes the **Value Changed** signal will be triggered.<##input##> |

## Outputs

| Signal                                            | Description                                                                               |
| ------------------------------------------------- | ----------------------------------------------------------------------------------------- |
| <span className="ndl-signal">Value Changed</span> | <##output:valueChanged##>This signal is sent when the input value is changed.<##output##> |