{"id":611,"date":"2011-03-08T18:07:08","date_gmt":"2011-03-08T18:07:08","guid":{"rendered":""},"modified":"2011-03-08T18:07:08","modified_gmt":"2011-03-08T18:07:08","slug":"611","status":"publish","type":"post","link":"https:\/\/www.poloo.org\/?p=611","title":{"rendered":"\u4f7f\u7528ImageLazyLoad\u6280\u672f\uff0c\u5bf9\u56fe\u7247\u5ef6\u8fdf\u52a0\u8f7d"},"content":{"rendered":"

ImageLazyLoad\u6280\u672f\uff0c\u5c31\u662f\u5728\u4e0b\u62c9\u6eda\u52a8\u6761\u7684\u65f6\u5019\u52a0\u8f7d\u56fe\u7247\uff0c\u8fd9\u79cd\u6bd4\u8f83\u9002\u5408\u4e00\u4e2a\u7f51\u9875\u4e0a\u6709\u5f88\u591a\u56fe\u7247\u7684\u60c5\u51b5\uff0c\u4f8b\u5982\u6dd8\u5b9d\u7684\u7f51\u7ad9\uff0c\u90a3\u4e48\u5982\u679c\u7528\u6237\u8bbf\u95ee\u7684\u65f6\u5019\uff0c\u4f1a\u5728\u52a0\u8f7d\u5b8c\u6574\u4e2a\u9875\u9762\u7b49\u5f85\u5f88\u957f\u65f6\u95f4\uff0c\u800c\u7528\u7b2c\u4e00\u773c\u770b\u5230\u7684\u53ea\u662f\u7b2c\u4e00\u5c4f\u7684\u5185\u5bb9\uff0c\u6240\u4ee5\u7b2c\u4e8c\u5c4f\u3001\u7b2c\u4e09\u5c4f\u7b49\u7684\u5185\u5bb9\u52a0\u8f7d\u65f6\u95f4\u5176\u5b9e\u662f\u5728\u6d6a\u8d39\u65f6\u95f4\uff01\u5982\u679c\u7528\u6237\u53ea\u770b\u4e86\u7b2c\u4e00\u5c4f\uff0c\u800c\u4e0d\u7ffb\u5c4f\u5c31\u5173\u6389\u4e86\u6d4f\u89c8\u5668\uff0c\u90a3\u4e48\u7b2c\u4e8c\u5c4f\u7b2c\u4e09\u5c4f\u4e0b\u8f7d\u7684\u8d44\u6e90\u4e5f\u662f\u4e00\u4e2d\u6d41\u91cf\u7684\u6d6a\u8d39\uff01 \u5e76\u4e14\u52a0\u8f7d\u7528\u6237\u4f53\u9a8c\u4e5f\u4e0d\u597d\uff01\u90a3\u4e48\u8fd9\u5c31\u6709\u4e86\u8fd9\u4e2a\u5c0f\u6280\u5de7\uff0c\u4f7f\u7528javascript\u6765\u5b9e\u73b0\u56fe\u7247\u7f13\u51b2\uff0c\u53ea\u52a0\u8f7d\u7528\u6237\u8981\u770b\u7684\u5c4f\u5e55\u7684\u8d44\u6e90\uff0c\u8fd9\u4e2a\u5c0f\u6280\u5de7\u7684\u597d\u5904\u662f\u63d0\u9ad8\u8bbf\u95ee\u901f\u5ea6\uff0c\u63d0\u9ad8\u7528\u6237\u4f53\u9a8c\uff0c\u5bf9seo\u6ca1\u6709\u4ec0\u4e48\u5e2e\u52a9\uff01\uff0c\u4e0d\u5e9f\u8bdd\uff0c\u8bf4\u505a\u6cd5\uff1a
\u4e00\u3001\u4f7f\u7528JQuery\u63d2\u4ef6 \uff0c\u63d2\u4ef6\u540d: jquery.lazyload\uff087kb\u5927\u5c0f\uff09\uff0c\u538b\u7f29\u540e\uff083kb\u5927\u5c0f\uff09\uff1a<\/p>\n

1.\u5bfc\u5165JS\u63d2\u4ef6

<script src=\"jquery.js\" type=\"text\/javascript\"><\/script>
<script src=\"jquery.lazyload.js\" type=\"text\/javascript\"><\/script>
<\/code>
2.\u5728\u4f60\u7684\u9875\u9762\u4e2d\u52a0\u5165\u5982\u4e0b\u7684javascript\uff1a
$(“img”).lazyload();
\u8fd9\u5c06\u4f1a\u4f7f\u6240\u6709\u7684\u56fe\u7247\u90fd\u5ef6\u8fdf\u52a0\u8f7d\u3002<\/p>\n

\u5f53\u7136\u63d2\u4ef6\u8fd8\u6709\u51e0\u4e2a\u914d\u7f6e\u9879\u53ef\u4f9b\u8bbe\u7f6e\uff1a
1.\u6539\u53d8threshold
$(\u201cimg\u201d).lazyload({ threshold : 200 });
\u628a\u9600\u503c\u8bbe\u7f6e\u6210200 \u610f\u601d\u5c31\u662f\u5f53\u56fe\u7247\u6ca1\u6709\u770b\u5230\u4e4b\u524d\u5148load 200\u50cf\u7d20\u3002<\/p>\n

2.\u5f53\u7136\u4e86\u4f60\u4e5f\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u5360\u4f4d\u7b26\u56fe\u7247\u548c\u81ea\u5b9a\u4e8b\u4ef6\u6765\u89e6\u53d1\u52a0\u8f7d\u56fe\u7247\u4e8b\u4ef6
\u590d\u5236\u4ee3\u7801
\u4ee3\u7801\u5982\u4e0b:

$(\"img\").lazyload({
placeholder : \"img\/grey.gif\",
event : \"click\"
});
<\/code>
3.\u53ef\u4ee5\u901a\u8fc7\u5b9a\u4e49effect \u53c2\u6570\u6765\u5b9a\u4e49\u4e00\u4e9b\u56fe\u7247\u663e\u793a\u6548\u679c
\u590d\u5236\u4ee3\u7801
\u4ee3\u7801\u5982\u4e0b:

$(\"img\").lazyload({
placeholder : \"img\/grey.gif\",
effect : \"fadeIn\"
});
<\/code>
LazyLoad(\u5ef6\u8fdf\u52a0\u8f7d)\u6280\u672f\u4e0d\u4ec5\u4ec5\u7528\u5728\u5bf9\u7f51\u9875\u4e2d\u56fe\u7247\u7684\u5ef6\u8fdf\u52a0\u8f7d\uff0c\u5bf9\u6570\u636e\u540c\u6837\u53ef\u4ee5\uff0cGoogle Reader\u548cBing\u56fe\u7247\u641c\u7d22\u5c31\u628aLazyLoad\u6280\u672f\u8fd0\u7528\u7684\u6dcb\u6f13\u5c3d\u81f4\uff1b<\/p>\n

\u7f3a\u9677\uff1a
1.\u4e0eAjax\u6280\u672f\u7684\u51b2\u7a81\uff1b
2.\u56fe\u7247\u7684\u5ef6\u8fdf\u52a0\u8f7d\uff0c\u9047\u5230\u9ad8\u5ea6\u7279\u522b\u9ad8\u7684\u56fe\u7247\uff0c\u4f1a\u51fa\u73b0\u505c\u6b62\u52a0\u8f7d\u7684\u95ee\u9898\uff1b
3.\u5199\u4ee3\u7801\u4e0d\u89c4\u8303\u7684\u540c\u5b66\u8981\u6ce8\u610f\u4e86\uff0c\u4e0d\u7ba1\u7531\u4e8e\u4ec0\u4e48\u539f\u56e0\uff0c\u5982\u679c\u60a8\u7684\u9875\u9762\u4e2d\uff0cimg\u6807\u7b7e\u7684height\u5c5e\u6027\u672a\u5b9a\u4e49\uff0c\u90a3\u4e48\u6211\u5efa\u8bae\u60a8\u6700\u597d\u4e0d\u8981\u4f7f\u7528ImageLazyLoad<\/p>\n

\u4e8c\u3001\u4f7f\u7528\u6dd8\u5b9d\u7684\u5ef6\u8fdf\u52a0\u8f7d\u6280\u672f:(2kb\u5927\u5c0f)
http:\/\/a.tbcdn.cn\/kissy\/1.0.0\/build\/imglazyload\/imglazyload-min.js<\/a>
\u8c03\u7528\u65b9\u6cd5\u4e5f\u662f\u5f88\u7b80\u5355\u7684\uff1a

<script src=\"http:\/\/a.tbcdn.cn\/kissy\/1.0.0\/build\/imglazyload\/imglazyload-min.js<\/a>\" type=\"text\/javascript\"><\/script>
<script type=\"text\/javascript\">\/\/ <![CDATA[KISSY.ImageLazyload();\/\/]]><\/script>
<\/code>
\u6ce8\uff1a\u8be5\u811a\u672c\u4f9d\u8d56 yahoo-dom-event, \u9875\u9762\u4e2d\u9700\u8981\u52a0\u8f7d yui 2.x,\u4f60\u4e5f\u53ef\u4ee5\u76f4\u63a5\u5f15\u7528\u4e0b\u9762\u7684\u5730\u5740:

<script src=\"http:\/\/kissy.googlecode.com\/svn\/trunk\/third-party\/yui2\/yahoo-dom-event\/yahoo-dom-event.js<\/a>\" type=\"text\/javascript\"><\/script>
<\/code>
\u914d\u7f6e\u53c2\u6570\u5982\u4e0b\uff1a

<script type=\"text\/javascript\">
KISSY.ImageLazyload({
mod: \"manual\", \/\/ \u5ef6\u8fdf\u6a21\u5f0f\u3002\u9ed8\u8ba4\u4e3a auto
diff: 200 \/\/ \u5f53\u524d\u5c4f\u5e55\u4e0b\u591a\u8fdc\u5904\u7684\u56fe\u7247\u5f00\u59cb\u5ef6\u8fdf\u52a0\u8f7d\u3002\u9ed8\u8ba4\u4e24\u5c4f\u5916\u7684\u56fe\u7247\u624d\u5ef6\u8fdf\u52a0\u8f7d
});
<\/script>
<\/code>
manual \u6a21\u5f0f\u65f6\uff0c\u9700\u8981\u624b\u52a8\u5c06\u9875\u9762\u4e2d\u9700\u8981\u5ef6\u8fdf\u52a0\u8f7d\u7684\u56fe\u7247\u7684 src \u5c5e\u6027\u540d\u66f4\u6539\u4e3a data-lazyload-src. \u6bd4\u5982 SRP \u9875\u9762\uff0c\u5b9d\u8d1d\u5217\u8868\u7684\u540e20\u4e2a\u56fe\u7247\u5ef6\u8fdf\u52a0\u8f7d\u3002 \u8f93\u51fa\u65f6\uff0chtml \u4ee3\u7801\u4e3a\uff1a
<img data-lazy-src=”img.jpg” alt=”something” \/><\/p>\n

\u5982\u679c\u60a8\u662fJquery\uff0cPrototype\u7b49\u8fd9\u4e9bJS\u6846\u67b6\u7684\u7c89\u4e1d\uff0c\u4ed6\u4eec\u90fd\u6709\u5b9a\u5236\u7684LazyLoad Plugin\u63d0\u4f9b\uff1ahttp:\/\/www.appelsiini.net\/projects\/lazyload<\/a><\/p>\n

LazyLoad(\u5ef6\u8fdf\u52a0\u8f7d)\u6280\u672f\u4e0d\u4ec5\u4ec5\u7528\u5728\u5bf9\u7f51\u9875\u4e2d\u56fe\u7247\u7684\u5ef6\u8fdf\u52a0\u8f7d\uff0c\u5bf9\u6570\u636e\u540c\u6837\u53ef\u4ee5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

ImageLazyLoad\u6280\u672f\uff0c\u5c31\u662f\u5728\u4e0b\u62c9\u6eda\u52a8\u6761\u7684\u65f6\u5019\u52a0\u8f7d\u56fe\u7247\uff0c\u8fd9\u79cd...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-611","post","type-post","status-publish","format-standard","hentry","category-Note"],"_links":{"self":[{"href":"https:\/\/www.poloo.org\/index.php?rest_route=\/wp\/v2\/posts\/611","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.poloo.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.poloo.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.poloo.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.poloo.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=611"}],"version-history":[{"count":0,"href":"https:\/\/www.poloo.org\/index.php?rest_route=\/wp\/v2\/posts\/611\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.poloo.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=611"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.poloo.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=611"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.poloo.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=611"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}