Eleventy sort by order

.eleventy.js

const sortByOrder = require('./sort-by-order.js');

module.exports = function(eleventyConfig) {
  eleventyConfig.addFilter('sortByOrder', sortByOrder);
}

sort-by-order.js

/**
 * Return back an array of collection items in the correct order that's set by the `order` front-matter.
 *
 * @param {array} value
 * @returns {array}
 */
module.exports = function sortByOrder(value) {
    return value.sort((a, b) => {
        return parseInt(a.data.order, 10) - parseInt(b.data.order, 10); 
    });
};

your-file.md

order
1

your-template.njk

{% for item in collections.all | sortByOrder %}
{% endfor %}