E4X

E4X (ECMAScript for XML) comprises the ShockScript language features specifically designed for eXtensible Markup Language.

XML literals

XML literals by default are used for creating implementation-defined objects; however, when the inference type is XML or XMLList, XML literals evaluate to one of these types.

// AppBar.es
package = com.example.components;

public function AppBar() : whack.ds.Node {
    return (
        <w:HGroup>
            <w:Button click&={trace("clicked!")}>button 1</w:Button>
        </w:HGroup>
    );
}

// data.es
package = com.example.datagenerator;

public function data(a:string) : XML {
    return (
        <tag>{a}</tag>
    );
}

{
    const xn = XML(<tag/>);
}

Attributes

<t a/> is equivalent to <t a={true}/>. Accessing XML attributes can be directly done by the @ operator, as in xnode.@x.

Event handlers

Inline event handlers may be expressed as eventName&={statementList} as a shortcut to eventName={function(event){statementList}}, as in:

<w:Button click&={trace("clicked!")}>Click me</w:Button>

If the event has no parameters, then the attribute above is equivalent to eventName={function(){statementList}}.

Interpolation

<w:VGroup {params}>
    {undefined}
    {null}
    {node}
    {nodeList}
    {plainText}
    {number}
</w:VGroup>

Filtering

XML and XMLList implement the filter operator.

people.(*.@name == "John")

Descendants

XML and XMLList implement the descendants operator.

xnode..tag

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