How to increment index number of array in template

[reshmajacob93]

Hi sir,

I have an array i want to show serial number in template i just add 1 with index but throws error

Can you please show me one example?

[jan_blaha]

Could you share a playground example for better understanding? Thank you
https://playground.jsreport.net/

[reshmajacob93]

My array is,

let testArr = [
{'id':1,'Name'':Test1},
{'id':2,'Name'':Test2}
];

My Template code is,

I want to show serial number starting 1,2,3 etc.So i add {{2}} + 1 but it throw error

[jan_blaha]

You can't write expressions to {{ in handlebars.
You need to write a custom helper.

For example

{{plusOne 3}}

function plusOne(val) {
  return val + 1
}