Answers for "document get element by attribute"

how to get element by attribute value in javascript

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

dom element get attribute

document.getElementById('id1').getAttribute('attribute');

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]')