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/*!
* verge 1.10.2+201705300050
* http://npm.im/verge
* MIT Ryan Van Etten
*/
!function(root, name, make) {
if (typeof module != 'undefined' && module['exports']) module['exports'] = make();
else root[name] = make();
}(this, 'verge', function() {
var xports = {}
, win = typeof window != 'undefined' && window
, doc = typeof document != 'undefined' && document
, docElem = doc && doc.documentElement
, matchMedia = win['matchMedia'] || win['msMatchMedia']
, mq = matchMedia ? function(q) {
return !!matchMedia.call(win, q).matches;
} : function() {
return false;
}
, viewportW = xports['viewportW'] = function() {
var a = docElem['clientWidth'], b = win['innerWidth'];
return a < b ? b : a;
}
, viewportH = xports['viewportH'] = function() {
var a = docElem['clientHeight'], b = win['innerHeight'];
return a < b ? b : a;
};
/**
* Test if a media query is active. Like Modernizr.mq
* @since 1.6.0
* @return {boolean}
*/
xports['mq'] = mq;
/**
* Normalized matchMedia
* @since 1.6.0
* @return {MediaQueryList|Object}
*/
xports['matchMedia'] = matchMedia ? function() {
// matchMedia must be binded to window
return matchMedia.apply(win, arguments);
} : function() {
// Gracefully degrade to plain object
return {};
};
/**
* @since 1.8.0
* @return {{width:number, height:number}}
*/
function viewport() {
return {'width':viewportW(), 'height':viewportH()};
}
xports['viewport'] = viewport;
/**
* Cross-browser window.scrollX
* @since 1.0.0
* @return {number}
*/
xports['scrollX'] = function() {
return win.pageXOffset || docElem.scrollLeft;
};
/**
* Cross-browser window.scrollY
* @since 1.0.0
* @return {number}
*/
xports['scrollY'] = function() {
return win.pageYOffset || docElem.scrollTop;
};
/**
* @param {{top:number, right:number, bottom:number, left:number}} coords
* @param {number=} cushion adjustment
* @return {Object}
*/
function calibrate(coords, cushion) {
var o = {};
cushion = +cushion || 0;
o['width'] = (o['right'] = coords['right'] + cushion) - (o['left'] = coords['left'] - cushion);
o['height'] = (o['bottom'] = coords['bottom'] + cushion) - (o['top'] = coords['top'] - cushion);
return o;
}
/**
* Cross-browser element.getBoundingClientRect plus optional cushion.
* Coords are relative to the top-left corner of the viewport.
* @since 1.0.0
* @param {Element|Object} el element or stack (uses first item)
* @param {number=} cushion +/- pixel adjustment amount
* @return {Object|boolean}
*/
function rectangle(el, cushion) {
el = el && !el.nodeType ? el[0] : el;
if (!el || 1 !== el.nodeType) return false;
return calibrate(el.getBoundingClientRect(), cushion);
}
xports['rectangle'] = rectangle;
/**
* Get the viewport aspect ratio (or the aspect ratio of an object or element)
* @since 1.7.0
* @param {(Element|Object)=} o optional object with width/height props or methods
* @return {number}
* @link http://w3.org/TR/css3-mediaqueries/#orientation
*/
function aspect(o) {
o = null == o ? viewport() : 1 === o.nodeType ? rectangle(o) : o;
var h = o['height'], w = o['width'];
h = typeof h == 'function' ? h.call(o) : h;
w = typeof w == 'function' ? w.call(o) : w;
return w/h;
}
xports['aspect'] = aspect;
/**
* Test if an element is in the same x-axis section as the viewport.
* @since 1.0.0
* @param {Element|Object} el
* @param {number=} cushion
* @return {boolean}
*/
xports['inX'] = function(el, cushion) {
var r = rectangle(el, cushion);
return !!r && r.right >= 0 && r.left <= viewportW();
};
/**
* Test if an element is in the same y-axis section as the viewport.
* @since 1.0.0
* @param {Element|Object} el
* @param {number=} cushion
* @return {boolean}
*/
xports['inY'] = function(el, cushion) {
var r = rectangle(el, cushion);
return !!r && r.bottom >= 0 && r.top <= viewportH();
};
/**
* Test if an element is in the viewport.
* @since 1.0.0
* @param {Element|Object} el
* @param {number=} cushion
* @return {boolean}
*/
xports['inViewport'] = function(el, cushion) {
// Equiv to `inX(el, cushion) && inY(el, cushion)` but just manually do both
// to avoid calling rectangle() twice. It gzips just as small like this.
var r = rectangle(el, cushion);
return !!r && r.bottom >= 0 && r.right >= 0 && r.top <= viewportH() && r.left <= viewportW();
};
return xports;
});