( function ( $ ) {
$.fn.unveil = function ( threshold, callback ) {
let $w = $( window ),
th = threshold || 0,
retina = window.devicePixelRatio > 1,
attrib = retina ? 'data-src-retina' : 'data-src',
images = this,
loaded;
this.one( 'unveil', function () {
let source = this.getAttribute( attrib );
source = source || this.getAttribute( 'data-src' );
if ( source ) {
this.setAttribute( 'src', source );
if ( typeof callback === 'function' ) callback.call( this );
}
} );
function unveil() {
const inview = images.filter( function () {
const $e = $( this ),
wt = $w.scrollTop(),
wb = wt + $w.height(),
et = $e.offset().top,
eb = et + $e.height();
return eb >= wt - th && et <= wb + th;
} );
loaded = inview.trigger( 'unveil' );
images = images.not( loaded );
}
$w.scroll( unveil );
$w.resize( unveil );
unveil();
return this;
};
} )( window.jQuery || window.Zepto );
limaamil – Lima Amil Imóveis
