CongaCustomButtonHandlerExample.js

$('body').on('click', 'button#sitpr', function() {
    
    let sessionId = $.urlParam('SessionId');
    let serverUrl = $.urlParam('ServerUrl');

    let siId15 = '{!si.Id}'.substring(0,15);
    let masterId15 = '{!congaMasterTemp}'.substring(0,15);
    let techId15 = '{!congaTechPrint}'.substring(0,15);
    let costId15 = '{!congaCostId}'.substring(0,15);
    let detailActive = '{!siDetail.Active__c}'.substring(0,15);

    let congParams = ''+
    '&id='+siId15+' '+
    '&ReportId=[SvcInqTech]'+techId15+'?pv0='+siId15+'~?pv1='+
    '&ReportId=[SICOST]'+costId15+'?pv0='+siId15+'~?pv1='+
    '&ReportId=[SvcInq]'+masterId15+'?pv0='+siId15;
    congParams = encodeURI(congParams);
    congParams = congParams.replace(/%5B/gi, '[').replace(/%5D/gi, "]");
    congParams = '?sessionId='+sessionId+'&serverUrl='+serverUrl+congParams;

    window.open('//composer.congamerge.com/composer8/index.html'+congParams, 'Conga', 'width:800px')

})