Render HTML tags for Javascript assets.

        Returns:
            string: HTML for Javascript assets from every registered config.

def js_html(self):
        """
        Render HTML tags for Javascript assets.

        Returns:
            string: HTML for Javascript assets from every registered config.
        """
        output = io.StringIO()

        for item in self.js():
            output.write(
                self.render_asset_html(item, settings.CODEMIRROR_JS_ASSET_TAG)
            )

        content = output.getvalue()
        output.close()

        return content