<input type="checkbox" id="c2" name="c2" value="DE039230952"/>;
//Replace $$ with document.querySelectorAll in the examples:
const $$ = document.querySelectorAll.bind(document);
$$("input"); //Every input
$$("[id]"); //Every element with id
$$('[id="c2"]'); //Every element with id="c2"
$$("input,[id]"); //Every input + every element with id
$$("input[id]"); //Every input including id
$$('input[id="c2"]'); //Every input including id="c2"
$$("input#c2"); //Every input including id="c2" (same as above)
$$('input#c2[value="DE039230952"]'); //Every input including id="c2" and value="DE039230952"
$$('input#c2[value^="DE039"]'); //Every input including id="c2" and value has content starting with DE039
$$('input#c2[value$="0952"]'); //Every input including id="c2" and value has content ending with 0952
$$('input#c2[value*="39230"]'); //Every input including id="c2" and value has conten
//Use the examples above directly, without the need for additional library,
//Some additions:
$$("."); //The same as $([class])
$$(div > input); //div is parent tag to input
document.querySelector(); //equals to $$()[0] or $()