Utils for JS

utils.js

/**
 * Util Create DOM using literal templates
 */
const createElement = tmpl => new DOMParser().parseFromString(tmpl, 'text/html').body.firstChild;

/**
 * Util Object Builder
 */
const builder = (newList = []) => {
    let list = newList;

    return {
        create(item) {
            list = list.push({...item, id: new Date().getTime()});

            return list;
        },
    
        read() {
            return list;
        },
    
        update(newItem, id) {
            list = list.map(item => {
                if (item.id === id) {
                    return {...newItem, id: item.id};
                }
                
                return item;
            });

            return list;
        },
    
        delete(id) {
            list = list.map(item => {
                if (item.id !== id) {
                    return item;
                }
            }).filter(Boolean);

            return list;
        }
    }
};

/**
 * Get Random Integer passing min and max including the both
 */
const getRndInteger = (min, max) => Math.floor(Math.random() * (max - min + 1) ) + min;

/**
 * Shuffle Array
 */
const shuffle = array => {
    let currentIndex = array.length;
    let temporaryValue;
    let randomIndex;
    
    // While there remain elements to shuffle...
    while (0 !== currentIndex) {
    
        // Pick a remaining element...
        randomIndex = Math.floor(Math.random() * currentIndex);
        currentIndex -= 1;
    
        // And swap it with the current element.
        temporaryValue = array[currentIndex];
        array[currentIndex] = array[randomIndex];
        array[randomIndex] = temporaryValue;
    }
    
    return array;
}