Adding offset to {{@index}} when looping through items in Handlebars

Question

I\'m iterating over a list in Handlebars using the built-in each helper. Within the each block, I\'m referencing the current loop index

Answer 1

The handlebars-helpers library has a fairly thorough mathematics library in lib/math.js, including a general purpose {{add a b}} helper defined as follows:

/**
 * Return the product of a plus b.
 *
 * @param {Number} a
 * @param {Number} b
 * @api public
 */
helpers.add = function(a, b) {
  return a + b;
};

If you don't want to copy and paste this into your project and you have the possibility to use npm, you can get this dependency as follows:

npm install handlebars-helpers --save

Then, you can register the math helpers as follows:

const handlebars = require('handlebars'),
  handlebarsHelpers = require('handlebars-helpers');

handlebarsHelpers.math({
  handlebars: handlebars
});