Renders the HTML representation of the element.

def render(self, **kwargs):
        """Renders the HTML representation of the element."""
        self.json = json.dumps(self.data)

        self._parent.html.add_child(Element(Template("""
            <div id="{{this.get_name()}}"></div>
            """).render(this=self, kwargs=kwargs)), name=self.get_name())

        self._parent.script.add_child(Element(Template("""
            vega_parse({{this.json}},{{this.get_name()}});
            """).render(this=self)), name=self.get_name())

        figure = self.get_root()
        assert isinstance(figure, Figure), ('You cannot render this Element '
                                            'if it is not in a Figure.')

        figure.header.add_child(Element(Template("""
            <style> #{{this.get_name()}} {
                position : {{this.position}};
                width : {{this.width[0]}}{{this.width[1]}};
                height: {{this.height[0]}}{{this.height[1]}};
                left: {{this.left[0]}}{{this.left[1]}};
                top: {{this.top[0]}}{{this.top[1]}};
            </style>
            """).render(this=self, **kwargs)), name=self.get_name())

        figure.header.add_child(
            JavascriptLink('https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js'),  # noqa
            name='d3')

        figure.header.add_child(
            JavascriptLink('https://cdnjs.cloudflare.com/ajax/libs/vega/1.4.3/vega.min.js'),  # noqa
            name='vega')

        figure.header.add_child(
            JavascriptLink('https://code.jquery.com/jquery-2.1.0.min.js'),
            name='jquery')

        figure.script.add_child(
            Template("""function vega_parse(spec, div) {
            vg.parse.spec(spec, function(chart) { chart({el:div}).update(); });}"""),  # noqa
            name='vega_parse')