JAVASCRIPT

js get element by attribute

document.querySelector('[hello="hi"]') // First element
document.querySelectorAll('[hello="hi"') // Get all elements (returns a array)

how to get element by attribute value in javascript

document.querySelectorAll('[data-foo="value"]');

js get element by attribute

//find first element with "someAttr" attribute
document.querySelector('[someAttr]')

js get element by attribute

//find all elements with "someAttr" attribute
document.querySelectorAll('[someAttr]') 

javascript document get by attribute

priceChange(price, prefix, key, id) {
            if (prefix === '+' && parseInt(price) > 0) {
                this.price_print = (parseInt(this.originalPrice) + parseInt(price)).toString().replace(/B(?=(d{3})+(?!d))/g, " ");
            } else if (price !== null) {
                this.price_print = parseInt(this.originalPrice).toString().replace(/B(?=(d{3})+(?!d))/g, " ");
            }
            document.querySelectorAll('[id_attr="attr' + key + '"]').forEach(function (el) {
                el.classList.remove('product__storage__item-active');
            });
            document.getElementById('value_option' + id).classList.add('product__storage__item-active');
        }