> For the complete documentation index, see [llms.txt](https://fbl.fireblink.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://fbl.fireblink.com/pitfalls/sequence-share-parameters.md).

# Sequence Action Handler - "shareParameters" option

`shareParameters` allow to share parameters across child actions instead of creating cloned version to split branches.

Usage example:

```yaml
# set default parameters
$parameters:
    test: false

'--':
    - fn: |-
        parameters.test = true

    - ctx:
        '$.test': 
            inline: $ref:parameters.test
```

As a result of execution `ctx.test` will have `false` value, ad `--` clones parameters for each of the actions. Meaning `fn` function that modifies the `parameters` will have no affect on `ctx`.

But, if we add `$shareParameters` metadata, things will change:

```yaml
# set default parameters
$parameters:
    test: false

'--':
  # tell action to share parameters
  shareParameters: true
  actions:
    - fn: |-
        parameters.test = true

    - ctx:
        '$.test': 
            inline: $ref:parameters.test
```

As a result of execution `ctx.test` will now have `true` value.

**Note:** this is actually an anti-pattern: `parameters` modification is shadowed and might not be obvious. Make sure to use `shareParameters` only when necessary.


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