Essentials of a responsive mobile website

Many parts of CSS3 are incompatible with browsers, so we need to add prefixes according to the browser’s core:
Firefox-moz-
Google and Apple-webkit-
ie9 and above-ms-
Open-o-
Early Apple browser (safari) linux konqueror needs to add: -khtml-
Google developed its own new kernel blink in 2013

Responsive mobile webpage: [Change style sheet (media query: allow css to be used based on browser width, js replacement)
; constrain the viewport; fluid layout (let the percentage be written as width, padding, margin)]

Events of the window object: onload loading is completed; onresize adjusts the size; onsrcoll scrolls the wheel.
js replacement style sheet