Last active
June 16, 2016 13:21
-
-
Save ryanmark/e8d4b080e6271083eccc319326d47f61 to your computer and use it in GitHub Desktop.
Phantom js doesn't seem to handle em-based media queries properly when zoomed
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
var WebPage = require('webpage'), | |
System = require('system'); | |
var address = System.args[1]; | |
var zoom = System.args[2]; | |
var width = 700; | |
var page = WebPage.create(); | |
page.viewportSize = { | |
width: width*zoom, | |
height: width*zoom | |
}; | |
page.zoomFactor = zoom; | |
page.open(address); | |
page.onConsoleMessage = function(msg) { console.log(msg); }; | |
page.onCallback = function(data) { | |
if ( data === 'gtg' ) { | |
page.close(); | |
phantom.exit(0); | |
} | |
}; | |
page.onLoadFinished = function(status) { | |
page.evaluate(function() { | |
function _phantomLoadCB() { | |
if (document.readyState === 'complete') { | |
var w = Math.max(document.documentElement.clientWidth, window.innerWidth || 0); | |
var h = Math.max(document.documentElement.clientHeight, window.innerHeight || 0); | |
console.log('window is '+[w,h].join('x')+' pixels'); | |
var div = document.createElement('div'); | |
div.style.width = "1em"; | |
document.body.appendChild(div); | |
var pixels = div.offsetWidth; | |
document.body.removeChild(div); | |
console.log('1em becomes '+pixels+' pixels'); | |
var pixelTarget = w - 100; | |
var emTarget = pixelTarget / pixels; | |
if ( window.matchMedia('(min-width: '+emTarget+'em)').matches ) { | |
console.log('window is at least '+emTarget+'em ('+(emTarget*pixels)+'px)'); | |
} else { | |
console.log('window is NOT at least '+emTarget+'em ('+(emTarget*pixels)+'px)'); | |
} | |
if ( window.matchMedia('(min-width: '+pixelTarget+'px)').matches ) { | |
console.log('window is at least '+pixelTarget+'px'); | |
} else { | |
console.log('window is NOT at least '+pixelTarget+'px'); | |
} | |
setTimeout(function() { window.callPhantom('gtg'); }, 1000); | |
} | |
} | |
document.onreadystatechange = _phantomLoadCB; | |
_phantomLoadCB(); | |
}); | |
}; |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment