[Meteor Js] – How to call functions in the page ?

For do this you can use:

Template.expensesItem.helpers({ })

Example :

Code JS File:

Template.myTemplate.helpers({
    'isToShow':function(userId) {
        if ( userId == Meteor.userId() ){
            return true;
        } else {
            return false;
        }
    }
});

Code HTML file:

{{#if isToShow userId }} {...} {{/if}}