Javascript Object Search

object-search.js

Array.prototype.search = function (keyword, options) {
    const results = [];
    if (options === undefined) options = {};

    this.map(item => {
        if (typeof item === "object") {
            var keys = Object.keys(item);
            if ("fields" in options)
                keys = options["fields"];

            let found = false;
            keys.map(key => {
                var field = item[key].toString();
                if ("ignoreCase" in options) {
                    if (field.search(keyword) !== -1)
                        found = true;
                } else {
                    if (field.toLowerCase().search(keyword.toLowerCase()) !== -1)
                        found = true;
                }
            });
            if (found) results.push(item);
        } else {
            if (item.toString().search(keyword) !== -1) results.push(item);
        }
    });

    return results;
}, false;

// Examples

const products = [];
products.push({ "label": "Beef", "cat": "Food" });
products.push({ "label": "Tomato", "cat": "Food" });
products.push({ "label": "Football", "cat": "Toys" });
products.push({ "label": "Bandaid", "cat": "First-aid" });

products.search("Foo") // [{ "label": "Beef", "cat": "Food" }, { "label": "Tomato", "cat": "Food" }, { "label": "Football", "cat": "Toys" }]
products.search("Foo", { fields: ["label"] }) // [{ "label": "Football", "cat": "Toys" }]
products.search("Ba", { ignoreCase: false, fields: ["label"] }) // [{ "label": "Bandaid", "cat": "First-aid" }]