The **action** liquid tag allows LocomotiveCMS developers to run secure **javascript** code on the server side.

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What's the Javascript engine powering Actions?

No Google V8, no JavaScriptCore, no SpiderMonkey. Instead, we use [Duktape](🔗), a lightweight and portable engine with Ruby bindings.

Here is a list of its capabilities:

• read and write Liquid variables of the current context

• read and write session variables

• built-in functions to read/create/update content entries

• built-in functions to send emails

### Example: