# Setting attributes

*Element* properties can be changed using attributes.

```xml
<div visible="false" />
```

Supports listening on signals as well.

Potentially it's more useful with more specific *Element*s from extensions.

    'use strict'

    module.exports = (File) ->
        {AttrsToSet} = File
        {Tag} = File.Element

        (file) ->
            {attrsToSet} = file

            forEachNodeRec = (node) ->
                for child in node.children
                    unless child instanceof Tag
                        continue

                    forEachNodeRec child

                    nodeProps = null
                    for prop of child.attrs when child.attrs.hasOwnProperty(prop)
                        if prop in ['name', 'children', 'attrs', 'style']
                            continue
                        unless prop of child
                            continue
                        nodeProps ?= {}
                        nodeProps[prop] = true

                    if nodeProps
                        attrsToSet.push new AttrsToSet file, child, nodeProps
                return

            forEachNodeRec file.node

            return