DOM javascript- add all elements as selected -

i working dom , when press key "i" elements should class "selected".

i cannot see why piece of code have written not working, please me.

my idea gather list of elements not have class selcted in "nodelist". once have that, loop through nodelist , each element add class "selected". in end want console.log how many elements selected. however, no part of code works! doing wrong?

thanks in advance.

if(keycode === 105) {         nodelist = document.queryselectorall("not(.selected)");         for(i= 0; i< nodelist.length; i++) {              place = nodelist[i];              place.classlist.add("selected");                     }         nodelist = document.queryselectorall(.selected);         console.log(nodelist.length);     }  

i think problem use of not, pseudo selector, have used element selector(with wrong syntax)

if (keycode === 105) {     nodelist = document.queryselectorall(":not(.selected)");//it pseudo selector     (i = 0; < nodelist.length; i++) {         place = nodelist[i];         place.classlist.add("selected");     }     nodelist = document.queryselectorall('.selected');//also use string literal here     console.log(nodelist.length); }