@restorecommerce/handlebars-helperized/lib/helpers/custom-helpers.js

Opinionated handlebars based templating engine for rendering e-mail like content

"use strict";
let customHandlebarsExtensions = (hbs, opts) => {
    // increment a given numerical string by one
    hbs.registerHelper('increment', (value, hash) => {
        const toIncrement = parseInt(value, 10);
        if (isNaN(toIncrement))
            return '0';
        return toIncrement + 1;
    });
};
module.exports = customHandlebarsExtensions;