javascript - How can i make a responsive web design viewer element

Question

I want to create an element div that all styling will be relative to (including vw and vh and media queries) i already started working on making the div resizable..

i actually want it to work like firefox responsive design mode

question from:https://stackoverflow.com/questions/65915901/how-can-i-make-a-responsive-web-design-viewer-element

Answer 1

Waitting for answers