Answers for "javascript get by attribute"

javascript get attribute

//HTML
//<div id="elem" data-id="4hJ3s"></div>

var elem = document.getElementById("elem");
elem.getAttribute("data-id"); // "4hJ3s"

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]')