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Take screenshots at different viewport sizes using CasperJS
/*
* Takes provided URL passed as argument and make screenshots of this page with several viewport sizes.
* These viewport sizes are arbitrary, taken from iPhone & iPad specs, modify the array as needed
*
* Usage:
* $ casperjs screenshots.js http://example.com
*/
var casper = require("casper").create();
var screenshotUrl = 'http://google.com/',
screenshotNow = new Date(),
screenshotDateTime = screenshotNow.getFullYear() + pad(screenshotNow.getMonth() + 1) + pad(screenshotNow.getDate()) + '-' + pad(screenshotNow.getHours()) + pad(screenshotNow.getMinutes()) + pad(screenshotNow.getSeconds()),
viewports = [
{
'name': 'smartphone-portrait',
'viewport': {width: 320, height: 480}
},
{
'name': 'smartphone-landscape',
'viewport': {width: 480, height: 320}
},
{
'name': 'tablet-portrait',
'viewport': {width: 768, height: 1024}
},
{
'name': 'tablet-landscape',
'viewport': {width: 1024, height: 768}
},
{
'name': 'desktop-standard',
'viewport': {width: 1280, height: 1024}
}
];
if (casper.cli.args.length < 1) {
casper
.echo("Usage: $ casperjs screenshots.js http://example.com")
.exit(1)
;
} else {
screenshotUrl = casper.cli.args[0];
}
casper.start(screenshotUrl, function() {
this.echo('Current location is ' + this.getCurrentUrl(), 'info');
});
casper.each(viewports, function(casper, viewport) {
this.then(function() {
this.viewport(viewport.viewport.width, viewport.viewport.height);
});
this.thenOpen(screenshotUrl, function() {
this.wait(5000);
});
this.then(function(){
this.echo('Screenshot for ' + viewport.name + ' (' + viewport.viewport.width + 'x' + viewport.viewport.height + ')', 'info');
this.capture('screenshots/' + screenshotDateTime + '/' + viewport.name + '-' + viewport.viewport.width + 'x' + viewport.viewport.height + '.png', {
top: 0,
left: 0,
width: viewport.viewport.width,
height: viewport.viewport.height
});
});
});
casper.run();
function pad(number) {
var r = String(number);
if ( r.length === 1 ) {
r = '0' + r;
}
return r;
}
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