How to use javascript conditionally like CSS3 media queries, orientation?

Question

How to use javascript conditionally like CSS3 media queries, orientation?

For Example I can write css for specific

@media only screen and (width : 1024px) and (orientation : landscape) {  .selector1 { width:960px}  } 

Now I want to only run some javascript if it match the same conditions

like

@media only screen and (width : 1024px) and (orientation : landscape) {  A javascript code here  } 

I have a external javascript for example http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.6.4.min.js and it should be only run on specific screen size and orientation

Answer 1

You can use window.matchMedia():

Test a mobile device media query

if (matchMedia('only screen and (max-width: 480px)').matches) {   // smartphone/iphone... maybe run some small-screen related dom scripting? } 

Test landscape orientation

if (matchMedia('all and (orientation:landscape)').matches) {   // probably tablet in widescreen view } 

Currently supported in all modern browsers (more details)

Polyfill for old browsers: https://github.com/paulirish/matchMedia.js/

Answer 2

...I want to run a javascript only if max-width of browser is 1900px and min-width is 768

EDIT: Actually, that was all wrong. If you're using a mobile device, use:

function doStuff(){     landscape = window.orientation? window.orientation=='landscape' : true;      if(landscape && window.innerWidth<1900 && window.innerWidth > 768){         //code here     } } window.onload=window.onresize=doStuff; if(window.onorientationchange){     window.onorientationchange=doStuff; }