我已经找到了解决方案。遗憾的是，
W3C关于preload链接的规范没有明确说明这一点，程序员们对此存在很多疑惑，尤其是关于开发者控制台错误消息的问题（单独谷歌以查看有多少人遇到了该问题并为此感到困惑；这表明这个非常有用的指令是多么被误解）。
你
不能仅使用
preload链接来加载字体。 它必须与
@font-face联合使用。具体来说，
preload链接必须在
@font-face指令之前出现，并且
@font-face必须紧随其后，如果不是立即出现。在部分中，
preload链接应该是您链接中的最后一个，然后
@font-face应该紧随其后，在链接的样式表或在随后的
<style>部分中进行定义。
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>
这个功能是有效的，实际上在关键呈现路径的初始导航中收集字体是其中的主要优势。 preload 目前只被 Chrome 和 Opera 支持，但其他浏览器肯定会跟进。
