Set

The {{ set [name] = [value] }} tag allows to create or modify a global variable. For example:

{{ set message = "Hello, world!" }}

Use pipes to transform the value:

{{ set message = "Hello, world!" |> toUpperCase }}

Block mode

It's also possible to capture the variable value between {{ set [name] }} and {{ /set }}.

{{ set message }}
  Hello, world!
{{ /set }}

Block mode supports pipes too:

{{ set message |> toUpperCase }}
  Hello, world!
{{ /set }}

Vento allows you to run JavaScript, so it's possible to create new variables using normal JavaScript code:

{{> const name = "Óscar" }}
{{ name }}

The set tag provides the following benefits:

With set, the variable is created globally. This means it's available in the included files (using include).
You can use Pipes.
It prevents errors of initializing the variable twice. For example, the following code will breaks, because the same variable is initialized twice:
```
{{> const name = "Óscar" }}
{{> const name = "Laura" }}
```
With set this will work fine:
```
{{ set name = "Óscar" }}
{{ set name = "Laura" }}
```

See Imports and exports to learn how to export and import variables from other templates.