那些遇到过的问题

使用'preload'链接指令在Chrome中预加载字体

Tom*_*Tom 11 fonts google-chrome hyperlink preload preloading

该preload指令未按预期在Chrome中执行.下面是一个完整的HTML页面,可以在Chrome中打开以进行结果比较.它应该应用所有5种字体; 相反,它只应用第一个预加载的字体,为应该是第二个字符制作一个虚假斜体,并简单地用默认的衬线代替剩下的3个字体.

此外,在开发人员的控制台中,对于五种字体中的每一种,此消息在大约3秒后出现:

The resource [URL] was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it wasn't preloaded for nothing.

奇怪的是,它确实将第一个字体(Muli)应用于h1和h2标签(尽管为它制作了一个虚假的斜体h2); 您可以单击错误消息中的URL,并在开发人员的控制台中显示预加载字体的预览.

有什么问题在这里有什么不妥？(我在Windows 8.1专业版的Chrome 56上测试了这个.)

<!DOCTYPE html>
<html>
<head>
    <title>Preload Font Test</title>
    <link rel="preload" href="https://fonts.gstatic.com/s/muli/v10/zscZFkjVRGyfQ_Pw-5exXPesZW2xOQ-xsNqO47m55DA.woff2" as="font" type="font/woff2" crossorigin>
    <link rel="preload" href="https://fonts.gstatic.com/s/muli/v10/YxNEAWILjDc466nftZdqXuvvDin1pK8aKteLpeZ5c0A.woff2" as="font" type="font/woff2" crossorigin>
    <link rel="preload" href="https://fonts.gstatic.com/s/opensans/v13/k3k702ZOKiLJc3WVjuplzBampu5_7CjHW5spxoeN3Vs.woff2" as="font" type="font/woff2" crossorigin>
    <link rel="preload" href="https://fonts.gstatic.com/s/opensans/v13/PRmiXeptR36kaC0GEAetxv79_ZuUxCigM2DespTnFaw.woff2" as="font" type="font/woff2" crossorigin>
    <link rel="preload" href="https://fonts.gstatic.com/s/lato/v13/tI4j516nok_GrVf4dhunkg.woff2" as="font" type="font/woff2" crossorigin>
    <style>
        h1 {font-family:'Muli';font-weight:400;font-style:normal;font-size:1.5em}
        h2 {font-family:'Muli';font-weight:400;font-style:italic;font-size:1.5em}
        h3 {font-family:'Open Sans';font-weight:700;font-style:normal;font-size:1.5em}
        h4 {font-family:'Open Sans';font-weight:700;font-style:italic;font-size:1.5em}
        h5 {font-family:'Lato';font-weight:900;font-style:normal;font-size:1.5em}
    </style>
</head>
<body>
    <h1>This should be in Muli regular 400 -- and it is!</h1>
    <h2>This should be in Muli Italic 400 -- but it's faux Muli Italic :(</h2>
    <h3>This should be in Open Sans Bold 700 -- but it's the default serif!</h3>
    <h4>This should be in Open Sans BoldItalic 700  -- but it's the default serif!</h4>
    <h5>This should be in Lato ExtraBold 900  -- but it's the default serif!</h5>
</body>
</html>
Run Code Online (Sandbox Code Playgroud)

Tom*_*Tom 14

我找到了解决方案.可悲的是,关于preload链接的W3C规范并未明确这一点,并且似乎存在很多混淆,程序员已经发布了有关它的问题,特别是关于开发人员的控制台错误消息(谷歌本身就看多少人们正在接受它,并为此感到困惑;这表明这个非常有用的指令是多么误解了).

您无法单独使用该preload链接来加载字体.它必须与@font-face.一起使用.具体来说,preload链接必须在@font-face指令之前,并且@font-face必须在preload链接之后很快发生,如果不是立即的话.看起来在该<head>部分中,preload链接应该在您的链接中排在最后,然后@font-face应该在链接样式表或后面的<style>部分中紧跟.

以下是原始代码的更正版本:

<!DOCTYPE html>
<html>
<head>
    <title>Preload Font Test</title>
    <link rel="preload" href="https://fonts.gstatic.com/s/muli/v10/zscZFkjVRGyfQ_Pw-5exXPesZW2xOQ-xsNqO47m55DA.woff2" as="font" crossorigin>
    <link rel="preload" href="https://fonts.gstatic.com/s/muli/v10/YxNEAWILjDc466nftZdqXuvvDin1pK8aKteLpeZ5c0A.woff2" as="font" crossorigin>
    <link rel="preload" href="https://fonts.gstatic.com/s/opensans/v13/k3k702ZOKiLJc3WVjuplzBampu5_7CjHW5spxoeN3Vs.woff2" as="font" type="font/woff2" crossorigin>
    <link rel="preload" href="https://fonts.gstatic.com/s/opensans/v13/PRmiXeptR36kaC0GEAetxv79_ZuUxCigM2DespTnFaw.woff2" as="font" type="font/woff2" crossorigin>
    <link rel="preload" href="https://fonts.gstatic.com/s/lato/v13/lEjOv129Q3iN1tuqWOeRBgLUuEpTyoUstqEm5AMlJo4.woff2" as="font" type="font/woff2" crossorigin>
    <style>
        @font-face{font-family:'Muli';font-weight:400;font-style:normal;src:url('https://fonts.gstatic.com/s/muli/v10/BkuZCUxEYxRfSu-XBj9_CA.eot');src:url('https://fonts.gstatic.com/s/muli/v10/BkuZCUxEYxRfSu-XBj9_CA.eot?#iefix') format('embedded-opentype'),
local('Muli Regular'),
local('Muli-regular'),
url('https://fonts.gstatic.com/s/muli/v10/zscZFkjVRGyfQ_Pw-5exXPesZW2xOQ-xsNqO47m55DA.woff2') format('woff2'),
url('https://fonts.gstatic.com/s/muli/v10/minRpKQdEvXRRS8oAbAtWvesZW2xOQ-xsNqO47m55DA.woff') format('woff'),
url('https://fonts.gstatic.com/s/muli/v10/BfQP1MR3mJNaumtWa4Tizg.ttf') format('truetype'),
url('https://fonts.gstatic.com/l/font?kit=5laWPvb-IgmGJk9r92y1Hw&skey=2b55aa3f2f059b75&v=v10#Muli') format('svg');}

@font-face{font-family:'Muli';font-weight:400;font-style:italic;src:url('https://fonts.gstatic.com/s/muli/v10/vurWTAYiHMPVScIey50dUQ.eot');src:url('https://fonts.gstatic.com/s/muli/v10/vurWTAYiHMPVScIey50dUQ.eot?#iefix') format('embedded-opentype'),
local('Muli Italic'),
local('Muli-italic'),
url('https://fonts.gstatic.com/s/muli/v10/YxNEAWILjDc466nftZdqXuvvDin1pK8aKteLpeZ5c0A.woff2') format('woff2'),
url('https://fonts.gstatic.com/s/muli/v10/DSOyST5zmfghBgRIogdupevvDin1pK8aKteLpeZ5c0A.woff') format('woff'),
url('https://fonts.gstatic.com/s/muli/v10/AQQ1r0_czneVCtTD9ckSEA.ttf') format('truetype'),
url('https://fonts.gstatic.com/l/font?kit=Ok1ULmeTg1kfss3jIu3xZQ&skey=f22af9a5d2e9fc47&v=v10#Muli') format('svg');}

@font-face{font-family:'Open Sans';font-weight:700;font-style:normal;
src:url('https://fonts.gstatic.com/s/opensans/v13/k3k702ZOKiLJc3WVjuplzHZ2MAKAc2x4R1uOSeegc5U.eot');
src:url('https://fonts.gstatic.com/s/opensans/v13/k3k702ZOKiLJc3WVjuplzHZ2MAKAc2x4R1uOSeegc5U.eot?#iefix') format('embedded-opentype'),
local('Open Sans Bold'),
local('Open-Sans-700'),
url('https://fonts.gstatic.com/s/opensans/v13/k3k702ZOKiLJc3WVjuplzBampu5_7CjHW5spxoeN3Vs.woff2') format('woff2'),
url('https://fonts.gstatic.com/s/opensans/v13/k3k702ZOKiLJc3WVjuplzKRDOzjiPcYnFooOUGCOsRk.woff') format('woff'),
url('https://fonts.gstatic.com/s/opensans/v13/k3k702ZOKiLJc3WVjuplzInF5uFdDttMLvmWuJdhhgs.ttf') format('truetype'),
url('https://fonts.gstatic.com/l/font?kit=k3k702ZOKiLJc3WVjuplzFlIn5tFQcqMuf-jhyJP0ps&skey=cd9e1a36bb25a3c3&v=v13#OpenSans') format('svg');}

@font-face{font-family:'Open Sans';font-weight:700;font-style:italic;src:url('https://fonts.gstatic.com/s/opensans/v13/PRmiXeptR36kaC0GEAetxrFt29aCHKT7otDW9l62Aag.eot');src:url('https://fonts.gstatic.com/s/opensans/v13/PRmiXeptR36kaC0GEAetxrFt29aCHKT7otDW9l62Aag.eot?#iefix') format('embedded-opentype'),
local('Open Sans Bold Italic'),
local('Open-Sans-700italic'),
url('https://fonts.gstatic.com/s/opensans/v13/PRmiXeptR36kaC0GEAetxv79_ZuUxCigM2DespTnFaw.woff2') format('woff2'),
url('https://fonts.gstatic.com/s/opensans/v13/PRmiXeptR36kaC0GEAetxhbnBKKEOwRKgsHDreGcocg.woff') format('woff'),
url('https://fonts.gstatic.com/s/opensans/v13/PRmiXeptR36kaC0GEAetxp_TkvowlIOtbR7ePgFOpF4.ttf') format('truetype'),
url('https://fonts.gstatic.com/l/font?kit=PRmiXeptR36kaC0GEAetxntNmQEE9wZ6UZlmiISB1pg&skey=7e5bb13249e84143&v=v13#OpenSans') format('svg');}

@font-face{font-family:'Lato';font-weight:900;font-style:normal;src:url('https://fonts.gstatic.com/s/lato/v13/BjDVcwQGWPX2RAidnkd0Bw.eot');src:url('https://fonts.gstatic.com/s/lato/v13/BjDVcwQGWPX2RAidnkd0Bw.eot?#iefix') format('embedded-opentype'),
local('Lato Black'),
local('Lato-900'),
url('https://fonts.gstatic.com/s/lato/v13/lEjOv129Q3iN1tuqWOeRBgLUuEpTyoUstqEm5AMlJo4.woff2') format('woff2'),
url('https://fonts.gstatic.com/s/lato/v13/G2uphNnNqGFMHLRsO_72ngLUuEpTyoUstqEm5AMlJo4.woff') format('woff'),
url('https://fonts.gstatic.com/s/lato/v13/4cKlrioa77J2iqTqBgkRWg.ttf') format('truetype'),
url('https://fonts.gstatic.com/l/font?kit=UxBsysUD4pfKXRb0IKmcRQ&skey=d01acf708cb3b73b&v=v13#Lato') format('svg');}

        h1 {font-family:'Muli';font-weight:400;font-style:normal;font-size:1.5em}
        h2 {font-family:'Muli';font-weight:400;font-style:italic;font-size:1.5em}
        h3 {font-family:'Open Sans';font-weight:700;font-style:normal;font-size:1.5em}
        h4 {font-family:'Open Sans';font-weight:700;font-style:italic;font-size:1.5em}
        h5 {font-family:'Lato';font-weight:900;font-style:normal;font-size:1.5em}

    </style>
</head>
<body>
    <h1>This should be in Muli regular 400 -- and it is!</h1>
    <h2>This should be in Muli Italic 400 -- and it is!</h2>
    <h3>This should be in Open Sans Bold 700 -- and it is!</h3>
    <h4>This should be in Open Sans BoldItalic 700 -- and it is!</h4>
    <h5>This should be in Lato ExtraBold 900 -- and it is!</h5>
</body>
</html>
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实际上,这确实可以收集您的字体作为关键渲染路径初始导航的一部分,这是主要的好处.preload目前只有Chrome和Opera支持,但其他浏览器肯定会遵循.

  • 我发现即使对于相对路径也需要**crossorigin**属性,否则chrome会显示此警告:使用链接预加载预加载但未在窗口加载事件的几秒钟内使用.请确保没有预装任何东西. (4认同)

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