I am trying to call JavaScript from python function.

Python class:

 def print_excel(self, cr, uid, ids, context=None):
        return self.print_report(cr, uid, ids, context=context)
    def print_report(self, cr, uid, ids, context=None):
        if context is None:
            context = {}
        datas = {'ids': context.get('active_ids', [])}
        res = self.read(cr, uid, ids, ['date_start', 'date_end', 'user_ids'], context=None)
        res = res and res[0] or {}
        datas['form'] = res
        if res.get('id',False):
            datas['ids']=[res['id']]
        if context.get('xls_export'):
            return {
                'class':'oe_export_excel',
                'type': 'text/javascript',
                'src':'/export_excel/static/src/js/export_excel_print.js',
                    }
        else:
            return self.pool['report'].get_action(cr, uid, [], 'point_of_sale.report_detailsofsales', data=datas, context=None)

JavaScript file:

    openerp.export_excel = function(instance, m) {
    var _t = instance.web._t;
    var QWeb = instance.web.qweb;
    
    instance.web.ListView.include({
        load_list: function () {
            var self = this;
            this._super.apply(this, arguments);
            self.$pager.find("oe_export_excel").unbind('click').click(function(event){self.export_to_excel("excel")})
        },
        export_to_excel: function(export_type) {
            var self = this
            var export_type = export_type
            view = this.getParent()
            // Find Header Element
            header_eles = self.$el.find('.oe_list_header_columns')
            header_name_list = []
            $.each(header_eles,function(){
                $header_ele = $(this)
                header_td_elements = $header_ele.find('th')
                $.each(header_td_elements,function(){
                    $header_td = $(this)
                    text = $header_td.text().trim() || ""
                    data_id = $header_td.attr('data-id')
                    if (text && !data_id){
                        data_id = 'group_name'
                    }
                    header_name_list.push({'header_name': text.trim(), 'header_data_id': data_id})
                   // }
                });
            });
            
            //Find Data Element
            data_eles = self.$el.find('.oe_list_content > tbody > tr')
            export_data = []
            $.each(data_eles,function(){
                data = []
                $data_ele = $(this)
                is_analysis = false
                if ($data_ele.text().trim()){
                //Find group name
	                group_th_eles = $data_ele.find('th')
	                $.each(group_th_eles,function(){
	                    $group_th_ele = $(this)
	                    text = $group_th_ele.text().trim() || ""
	                    is_analysis = true
	                    data.push({'data': text, 'bold': true})
	                });
	                data_td_eles = $data_ele.find('td')
	                $.each(data_td_eles,function(){
	                    $data_td_ele = $(this)
	                    text = $data_td_ele.text().trim() || ""
	                    if ($data_td_ele && $data_td_ele[0].classList.contains('oe_number') && !$data_td_ele[0].classList.contains('oe_list_field_float_time')){
	                        text = text.replace('%', '')
	                        text = instance.web.parse_value(text, { type:"float" })
	                        data.push({'data': text || "", 'number': true})
	                    }
	                    else{
	                        data.push({'data': text})
	                    }
	                });
	                export_data.push(data)
                }
            });
            
            //Find Footer Element
            
            footer_eles = self.$el.find('.oe_list_content > tfoot> tr')
            $.each(footer_eles,function(){
                data = []
                $footer_ele = $(this)
                footer_td_eles = $footer_ele.find('td')
                $.each(footer_td_eles,function(){
                    $footer_td_ele = $(this)
                    text = $footer_td_ele.text().trim() || ""
                    if ($footer_td_ele && $footer_td_ele[0].classList.contains('oe_number')){
                        text = instance.web.parse_value(text, { type:"float" })
                        data.push({'data': text || "", 'bold': true, 'number': true})
                    }
                    else{
                        data.push({'data': text, 'bold': true})
                    }
                });
                export_data.push(data)
            });
            
            //Export to excel
            $.blockUI();
            if (export_type === 'excel'){
                 view.session.get_file({
                     url: '/web/export/zb_excel_export',
                     data: {data: JSON.stringify({
                            model : view.model,
                            headers : header_name_list,
                            rows : export_data,
                     })},
                     complete: $.unblockUI
                 });
             }
        },
    });
};

When I run this module, the page stopped loading.

What am I doing wrong here?