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                ``` function getImageWidth(url,callback){ var img = new Image(); img.src = url; // 如果圖片被緩存,則直接返回緩存數據 if(img.complete){ callback(img.width, img.height); }else{ // 完全加載完畢的事件 img.onload = function(){ callback(img.width, img.height); } } } ``` >文章內容頁,如果圖片寬度小于文章區域就原圖大小,如果大于,就100% ``` ~~~ <script> $(document).ready(function () { var _w = parseInt($('#article_box').width()); $("#article_box p img").each(function (i) { let _img = $(this); var imgSrc = _img.attr("src"); getImageWidth(imgSrc, function (w, h) { if (w &gt; _w) { _img.css('width', '100%'); } }); }); function getImageWidth(url, callback) { var img = new Image(); img.src = url; // 如果圖片被緩存,則直接返回緩存數據 if (img.complete) { callback(img.width, img.height); } else { // 完全加載完畢的事件 img.onload = function () { callback(img.width, img.height); } } } }); </script> ~~~ ```
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