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Add template editor

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Fabian Affolter 2015-12-18 12:32:22 +01:00
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source/getting-started/templating.markdown
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---
The template helper enables one to mathematically manipulate values and use variables to extract values from JSON. If the entity has template support then the `value_template` key can be set in the `configuration.yaml` file.
The template helper enables one to mathematically manipulate values, use variables to extract values from JSON, and create customized messages to send with the [notification component](components/notify/). If the entity has template support then the `value_template` key can be set and used (eg. `message:` in `data:` of an automation rule) in the `configuration.yaml` file.
```yaml
value_template: '{% raw %}{{ value.x }}{% endraw %}'
```
To check your templates on-the-fly checkout the **Template Editor** from the **Developer Tools**.
For a complete overview, check the [Jinja2 documentation](http://jinja.pocoo.org/docs/dev/templates/).
### {% linkable_title Accessing variables %}