How to use json in handlebars with nodeJs expressJs

I have a JSON data in dataList variable and I want to add this in custom handlebars helper as a parameter.

var dataList = [
      {
         "id": 1,
         "title": "Arrange meeting",
         "date": "Today 10:35 | By Admin",
         "completed": true
      },
   ];

Handlebars Custom helper

 var Handlebar    = require('handlebars');
Handlebar.registerHelper('List', function(data, options){
    //console.log(data) //returns undefined 
    return options.fn(JSON.parse(data));
});

Custom Helper Rendering:

When I have add full json code in with single quotes then works perfectly but I want to add variable of json data (dataList). because I want to change data dynamically. now it produce SyntaxError: Unexpected token u in JSON at position 0 error.

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