Javascript three element method
<script>
Var a=document. GetElementById (' box ');
The console. Dir (a);
</script>
AABB
<script>
Var b=document. GetElementsByClassName (' test ') [1];
The console. Dir (b);
</script>
AABB
<script>
Var c=document. QuerySelector (bock, "");
The console. Dir (c);
</script>
