preload

问题 I have inserted the following in the .htaccess of my site in order to be admitted to the HSTS preload list: <ifModule mod_headers.c> Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" </ifModule> The problem is that when I submit my site, I obtain: Warning: Unnecessary HSTS header over HTTP. The HTTP page at http: //fabriziorocca.it sends an HSTS header. This has no effect over HTTP, and should be removed. At the moment I use the following in the

问题 I added the attribute rel="preload" to all css links like this : <link rel='preload' onload='this.rel="stylesheet"' as='style' id='reworldmedia-style-css' href='style.css' type='text/css' media='all' /> It works fine in Chrome but not in Safari or Firefox 回答1: I found a possibly best solution is to load two files as below - browsers that support preload will use it as intended and those that don't (like Firefox) will only use the regular (2nd link). This solution doesn't require using the

问题 I'm trying to preload image on click event: // new image object var imgObject = new Image(); // assign the path to the image to the src property imgObject.src = document.URL + 'image/image.jpg'; // check if image has loaded if (imgObject.complete) { But the complete call never returns true on the first click - any idea what I'm missing here? 回答1: .complete is a property of the image object, not an event that you can attach to. Use the onload event: var image = new Image(); image.onload =

问题 I was wondering if anyone could shed insight as to how I could add a spinning preloader (like apple uses) using the jQuery Block UI plugin. The preloader would have to spin until the AJAX content loads. Is this possible with Block UI? Any direction would be helpful, thanks! 回答1: Find a good animated throbber image off the web, like this: Set up a hidden throbber div to show it. <div id="throbber" style="display:none;"> <img src="/img/busy.gif" /> </div> Tell blockUI to use that div as the

问题 I was wondering if anyone could shed insight as to how I could add a spinning preloader (like apple uses) using the jQuery Block UI plugin. The preloader would have to spin until the AJAX content loads. Is this possible with Block UI? Any direction would be helpful, thanks! 回答1: Find a good animated throbber image off the web, like this: Set up a hidden throbber div to show it. <div id="throbber" style="display:none;"> <img src="/img/busy.gif" /> </div> Tell blockUI to use that div as the

问题 I am using AVPlayer to play videos. The lenght of them is short, 2-5 second. They are played in a random order. The problem is, when changing video, and a new video starts to play, the device lags for a very short time, but i wan't the change to be fluid. Is there a way to preload videos with AVPlayer? 回答1: Try using AVQueuePlayer . I am assuming that what you described as a lag, in fact is the pre buffering delay. This should be minimized or actually entirely be gotten rid of when using

问题 I have a 20 second long HTML5 video loop as the background on my webpage and it is set to autostart. Is it possible to delay the video autoplay for 5 seconds? I am trying to allow the video to load completely before trying to play to prevent it from stuttering as much. Here is my current code: <video id="video_background" poster="images/dmm_background.jpg" controls="controls" preload="true" autoplay="true" loop="loop" muted="muted" volume="0"> <source src="videos/backgroundvideo.mp4" type=

问题 I've done a little shared library that tries to intercept open, open64, stat and stat64 sys calls. When I export LD_PRELOAD and run oracle's sqlplus, I can see the traces of the open and open64 calls, but no traces of the stat and stat64 calls. The shared library is a single c file with all the definitions of the sys calls in it. Why does it happen that some syscalls are intercepted and others don't? thanks for your help. 回答1: Because the GNU libc implements open() and open64() as you'd

问题 I'm fairly new to web design, I've just created following website http://www.janewaltonwatercolours.co.uk, and apart from a couple of minor gliches its working on all browsers. However, in Chrome, my javascript function for preloading images is not working (causing flicker for navigation bar images, amongst other things) and having tried everything and not coming across any answers on the web i'm slowly going mad...... Heres the relevant code:- var navbarImages = new Array(); preload

问题 when we define hover state of anything CSS... & on hover state we change the background:url('image path'); will this image be preloaded of will be download on the first hover of the element.. if that is so then how to preload it... i know the javascript to preload images.. is that going to work... 回答1: If you're trying to avoid having your hover state images only load they they're being hovered on, instead of preloading them, why not create sprites that hold both the normal and hover images ?