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fix bug where images loaded from chrome cache results in 0 WIDTH elements #34

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fix bug where images loaded from chrome cache results in 0 WIDTH elements #34

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9 changes: 6 additions & 3 deletions src/spritespin.js
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Original file line number Diff line number Diff line change
Expand Up @@ -676,10 +676,13 @@
var h = Math.floor(data.height || data.frameHeight || data.target.innerHeight());

if (data.responsive && (typeof window.getComputedStyle === 'function')) {
var style = getComputedStyle(data.target[0]);
if (style.width) {
var styleWidth = getComputedStyle(data.target[0]).width;
// The image ("data.target[0]") can be loaded from the browser cache, which in some cases makes
// "getComputedStyle().width" return the "auto" value (resulting in "w = 0").
// Not sure if the "inherit" and "inital" cases are possible, but it doesn't hurt to prevent.
if (styleWidth && styleWidth !== 'auto' && styleWidth !== 'inherit' && styleWidth !== 'initial') {
var a = w / h;
w = Number(style.width.replace('px', ''))|0;
w = Number(styleWidth.replace('px', ''))|0;
h = (w / a)|0;
}
}
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