how can i true "wait for printing trigger:true"

in my nodejs

jsreport.render({
        template: {
            content: fs.readFileSync('./emailtemplate.html').toString('utf8'),
            engine: 'handlebars',
            recipe: 'phantom-pdf',

            phantom: {
                header: '<div style="float:right">Page {#pageNum} of {#numPages}</div>',
                footer: "Rent Dues Report",
                format: 'A4',
                orientation: 'portrait',
                footerHeight: '0.7cm',
                headerHeight: '0.7cm',
                margin: '0.5cm',
                waitforprintingtrigger:true
            }
        },