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作者 | 正文 |
发表时间:2010-10-29
最后修改:2010-10-29
嗯.hoooooooooopo说的没错.
http1.1规范里面建议每个domain两个连接并行下载.所以可以把图片什么的分域名. 脚本会阻塞的原因是: 浏览器不知道脚本会不会修改DOM. 比如脚本里面可能会call document.write. 好吧.全是抄上面的. ps: Yslow就是根据这本书进行评分的. (具体不知道现在情况怎么样了. |
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发表时间:2010-10-29
jsdit 写道 我之前是放在head里面,然后经常遇到DOM没有加载完,然后JS就调用,报出空的错误。没有使用JQuery,所以也没有ready()方法,后来就把JS放在底部了。
汗,ready ~= window.onload; |
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发表时间:2010-10-30
kjj 写道 jsdit 写道 我之前是放在head里面,然后经常遇到DOM没有加载完,然后JS就调用,报出空的错误。没有使用JQuery,所以也没有ready()方法,后来就把JS放在底部了。
汗,ready ~= window.onload; 汗....差很多好不好... ready=domLoadedComplete |
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发表时间:2010-10-30
PS...
LZ知识没学好.. 每一个读取js,css,图片什么都是一个http连接,关长连接啥事... CSS尽量放头部, js尽量放最后(不过一般还是会放头部) css,图片会并行下载 |
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发表时间:2010-10-30
这个嘛,也不一定了,有些js代码好像只能放在head中加载。
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发表时间:2010-10-30
kjj 写道 jsdit 写道 我之前是放在head里面,然后经常遇到DOM没有加载完,然后JS就调用,报出空的错误。没有使用JQuery,所以也没有ready()方法,后来就把JS放在底部了。
汗,ready ~= window.onload; if (document.getElmentById && document.getElementByTagNames) 好像是这样吧,jQuery应该还有别的判断... 乃觉得这种判断跟你 window.onload是一回事吗? |
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发表时间:2010-10-30
JS如果没有页面加载完成前就要执行的必要,都放下面吧
如果实在是太多,要考虑延迟加载了 关于下载,其实可以搞个同域名的iframe进行下载,不会跟主页面发生 下载并发冲突 下载完成后,回调主页面的方法 不过创建iframe有点慢,能不用就最好不用,纠结啊 |
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发表时间:2010-10-30
kjj 写道 根据大牛们检验,js等资源一般放在<head>中加载时最好的方案,具体原因就不说了
我只想知道是哪位大牛,或者你说的是反语?!?! |
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发表时间:2010-10-30
最后修改:2010-10-30
给你们展示下我新公司的一个公用JSP页面,这个JSP被我54掉了
<script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery-1.3.2.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/i18n/grid.locale-en.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/i18n/grid.locale-cn.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.jqGrid.min.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/json2.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.tree.min.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.tree.checkbox.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.firstebox.pack.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.validate.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/i18n/jquery.validate.messages_cn.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/framework.ui.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.datepick.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.scroll-follow.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.datepick-zh-CN.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.tooltip.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.scroll-follow.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/select-option-disabled-emulation.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jmessagebox-1.0.0.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery-ui-1.7.2.custom.min.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/timepicker.js'/>"></script> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/portal-style.css' />" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/messagebox.css' />" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jquery-ui-1.7.2.custom.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jquery-ui-1.7.2.c3.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/ui.jqgrid.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jquery.searchFilter.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jstree.default.style.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jstree.chechbox.style.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/firstebox.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jquery.datepick.css' />" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jquery.tooltip.css' />" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/background.screen.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/validate-error-style.css' />" /> |
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发表时间:2010-10-30
罗卜头 写道 给你们展示下我新公司的一个公用JSP页面,这个JSP被我54掉了
<script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery-1.3.2.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/i18n/grid.locale-en.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/i18n/grid.locale-cn.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.jqGrid.min.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/json2.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.tree.min.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.tree.checkbox.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.firstebox.pack.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.validate.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/i18n/jquery.validate.messages_cn.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/framework.ui.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.datepick.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.scroll-follow.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.datepick-zh-CN.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.tooltip.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery.scroll-follow.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/select-option-disabled-emulation.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jmessagebox-1.0.0.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/jquery-ui-1.7.2.custom.min.js'/>"></script> <script language="javascript" type="text/javascript" src="<c:url value='/scripts/timepicker.js'/>"></script> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/portal-style.css' />" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/messagebox.css' />" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jquery-ui-1.7.2.custom.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jquery-ui-1.7.2.c3.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/ui.jqgrid.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jquery.searchFilter.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jstree.default.style.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jstree.chechbox.style.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/firstebox.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jquery.datepick.css' />" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/jquery.tooltip.css' />" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/background.screen.css'/>" /> <link rel="stylesheet" type="text/css" media="screen" href="<c:url value='/styles/validate-error-style.css' />" /> 比我公司还厉害.... 不过我有个东西....在线合并js和css...只不过还没正式使用.. |
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