What is the difference between device mode and normal resize?

Question

Google Chrome

Hi
I'm making an adaptive, I'm looking in chrome: if I turn on Device mode and change the resolution there, then the block breaks at 1000px, and if I change the resolution of the browser window, it jumps to 1150px. What is the difference between them?

Answer 1

Maybe because of

<meta name="viewport" content="width=device-width, initial-scale=1">

Answer 2

foreach ($selectlid as $obj) {
if (!in_array((int)$obj->list_id, $_POST['groups'])) {
$resultArrayz[] = $obj->list_id;
}
}