typecho博客使用网站预加载instantclick脚本 浏览器控制台报错Uncaught SyntaxError: Unexpected token <
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instantclick是一个预加载js文件,当用户鼠标停留在文章页面xx毫秒(时间可以定义)之后,开始自动加载,从而缩短用户放开网页时间,这就是预加载脚本。
1.使用国外主机的朋友,只需要将下面这行代码加入在</body>
之前即可!
<script src="//instant.page/1.2.2" type="module" integrity="sha384-2xV8M5griQmzyiY3CDqh1dn4z3llDVqZDqzjzcY+jCBCk/a5fXJmuZ/40JJAPeoU"></script>
2.服务器在国内的朋友,只需将以下js上传到自己服务器,并在</body>
之前调用即可!
[collapse title="instantclick js文件" status="false"]
/*! instant.page v1.2.2 - (C) 2019 Alexandre Dieulot - https://instant.page/license */
let urlToPreload
let mouseoverTimer
let lastTouchTimestamp
const prefetcher = document.createElement('link')
const isSupported = prefetcher.relList && prefetcher.relList.supports && prefetcher.relList.supports('prefetch')
const isDataSaverEnabled = navigator.connection && navigator.connection.saveData
const allowQueryString = 'instantAllowQueryString' in document.body.dataset
const allowExternalLinks = 'instantAllowExternalLinks' in document.body.dataset
if (isSupported && !isDataSaverEnabled) {
prefetcher.rel = 'prefetch'
document.head.appendChild(prefetcher)
const eventListenersOptions = {
capture: true,
passive: true,
}
document.addEventListener('touchstart', touchstartListener, eventListenersOptions)
document.addEventListener('mouseover', mouseoverListener, eventListenersOptions)
}
function touchstartListener(event) {
/* Chrome on Android calls mouseover before touchcancel so `lastTouchTimestamp`
* must be assigned on touchstart to be measured on mouseover. */
lastTouchTimestamp = performance.now()
const linkElement = event.target.closest('a')
if (!isPreloadable(linkElement)) {
return
}
linkElement.addEventListener('touchcancel', touchendAndTouchcancelListener, {passive: true})
linkElement.addEventListener('touchend', touchendAndTouchcancelListener, {passive: true})
urlToPreload = linkElement.href
preload(linkElement.href)
}
function touchendAndTouchcancelListener() {
urlToPreload = undefined
stopPreloading()
}
function mouseoverListener(event) {
if (performance.now() - lastTouchTimestamp < 1100) {
return
}
const linkElement = event.target.closest('a')
if (!isPreloadable(linkElement)) {
return
}
linkElement.addEventListener('mouseout', mouseoutListener, {passive: true})
urlToPreload = linkElement.href
mouseoverTimer = setTimeout(() => {
preload(linkElement.href)
mouseoverTimer = undefined
}, 65)
}
function mouseoutListener(event) {
if (event.relatedTarget && event.target.closest('a') == event.relatedTarget.closest('a')) {
return
}
if (mouseoverTimer) {
clearTimeout(mouseoverTimer)
mouseoverTimer = undefined
}
else {
urlToPreload = undefined
stopPreloading()
}
}
function isPreloadable(linkElement) {
if (!linkElement || !linkElement.href) {
return
}
if (urlToPreload == linkElement.href) {
return
}
const preloadLocation = new URL(linkElement.href)
if (!allowExternalLinks && preloadLocation.origin != location.origin && !('instant' in linkElement.dataset)) {
return
}
if (!['http:', 'https:'].includes(preloadLocation.protocol)) {
return
}
if (preloadLocation.protocol == 'http:' && location.protocol == 'https:') {
return
}
if (!allowQueryString && preloadLocation.search && !('instant' in linkElement.dataset)) {
return
}
if (preloadLocation.hash && preloadLocation.pathname + preloadLocation.search == location.pathname + location.search) {
return
}
if ('noInstant' in linkElement.dataset) {
return
}
return true
}
function preload(url) {
prefetcher.href = url
}
function stopPreloading() {
prefetcher.removeAttribute('href')
}
[/collapse]
调用代码
<script src="`存放路径`/instantclick-1.2.2.js" type="module"></script>
或者使用左岸大佬的
<script src="https://cdn.zrahh.com/js/instantclick-1.2.2.js" type="module"></script>
或者用我的也是又拍云CDN
<!-- instantclick网站预加载脚本 -->
<script src="https://image.liufw.cn/irom/js/instantclick-1.2.2.js" type="module"></script>
预加载脚本报错,浏览器控制台出现
Uncaught SyntaxError: Unexpected token
我的typecho博客handsome主题,使用预加载instantclick js浏览器控制台出错。一开始以为是标签的问题,后来在才发现是因为我在handesome主题设置里面将加载脚本放在了自定义 JavaScript里面导致出现错误 。
- instant.page 是渐进式增强 - 对不支持它的浏览器没有影响。
handsome主题正确的应该放在自定义输出body 尾部的HTML代码,或者主题文件footer.php文件</body>标签前面。
因为我的懒惰,放在模版设置里面可以避免由于handesome主题升级又要重新添加的问题,才饶了这么大的弯路,真是庸人自扰之!
网站预加载js脚本 来源于左岸博客https://www.zrahh.com/archives/399.html
一个人除非自己有信心,否则带给别人信心。
测试完
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