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Invisibility evaluate accurately #109

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Invisibility evaluate accurately #109

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11 changes: 11 additions & 0 deletions blazy.js
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Original file line number Diff line number Diff line change
Expand Up @@ -171,6 +171,17 @@
}

function loadElement(ele, force, options) {
// if element has src attribute but doesn't have width or height,
// the reason may be that the palceholder image has not yet loaded,
// so bind this function to its load event to evaluate accurately.
if (ele.getAttribute('src') && (ele.offsetWidth == 0 || ele.offsetHeight == 0)) {
var onLoadHandlerTemp = function() {
unbindEvent(ele, 'load', onLoadHandlerTemp);
loadElement(ele, force, options);
};
bindEvent(ele, 'load', onLoadHandlerTemp);
return;
}
// if element is visible, not loaded or forced
if (!hasClass(ele, options.successClass) && (force || options.loadInvisible || (ele.offsetWidth > 0 && ele.offsetHeight > 0))) {
var dataSrc = ele.getAttribute(_source) || ele.getAttribute(options.src); // fallback to default 'data-src'
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