Handlebars:
Template
{{>header}}
<hr/>
{{#each persons}}
{{>person person=.}}
{{/each}}
header
[rename] [delete]
{{persons.length}} persons found
person
[rename] [delete]
The person {{person.name}} is {{person.age}} years old.
Preparation-Script
// Handlebars.registerHelper('loud', function(string) {
//    return string.toUpperCase()
// });
Input
{
  persons: [
    { name: "Nils", age: 20 },
    { name: "Teddy", age: 10 },
    { name: "Nelson", age: 40 },
  ],
}
Output
3 persons found
<hr/>
The person Nils is 20 years old.
The person Teddy is 10 years old.
The person Nelson is 40 years old.
test
Last Updated: 2/20/2020, 7:02:47 PM