browser

问题 Is there some programmatic way or maybe a browser plugin that allows users to arbitrarily run any jQuery they want on a webpage that is currently loaded in their browser? Edit My motivation is to be able to test jQuery syntax and commands ahead of time on a page and then go add them to its source or suggest tweaks to the webadmins whose pages I experimented with. 回答1: FireQuery is a great Firebug extension that can include jQuery for you and from there you´re able to use jQuery in your

问题 In Apache's mod_expires module, there is the Expires directive with two base time periods, access , and modification . ExpiresByType text/html "access plus 30 days" understandably means that the cache will request for fresh content after 30 days. However, ExpiresByType text/html "modification plus 2 hours" doesn't make intuitive sense. How does the browser cache know that the file has been modified unless it makes a request to the server? And if it is making a call to the server, what is the

问题 I am grabbing a Wikia page using Python requests. There's a problem, though: the requests request isn't giving me the same HTML as my browser is with the very same page. For comparison, here's the page Firefox gets me, and here's the page requests fetches (download them to view - sorry, no easy way to just visually host a bit of HTML from another site). You'll note a few differences (super unfriendly diff). There are some small things, like attributes beinig ordered differently and such, but

问题 I was looking for a way to edit JavaScript in a browser, such as Firefox, on the fly and execute it. Firebug allows us to edit HTML and CSS on the fly but JavaScript is a pain. I have to go back to the source and modify that. I don't understand why the browser developer tools don't allow editing. Is there a way to do it? [Update]: Marked a new answer in 2015 Quick pointers: IE now provides one of the best dev/debugging experience Chrome provides IntelliSense while writing javaScript, which is

问题 Are there any web browsers out there that can playback the H.265 / MPEG-4 HEVC codec in a html5 video element? On what platform or hardware? I heard rumours about HEVC support in Edge when hardware decoding is available. With current GPUs and CPUs shipping with HEVC hardware decoding I wonder which other browser vendors are following. Firefox already works like this for H.264 回答1: It works in IE and Edge but only if there is hardware support. It's also reported to work in Android browser and

问题 Are there any web browsers out there that can playback the H.265 / MPEG-4 HEVC codec in a html5 video element? On what platform or hardware? I heard rumours about HEVC support in Edge when hardware decoding is available. With current GPUs and CPUs shipping with HEVC hardware decoding I wonder which other browser vendors are following. Firefox already works like this for H.264 回答1: It works in IE and Edge but only if there is hardware support. It's also reported to work in Android browser and

问题 Hello I have often experienced while developing my web applications that pressing F5 or refresh doesn't produce or refresh the proper result. But when we hit CTRL + F5 it generates the correct result. What is the basic difference between simple F5 and CTRL + F5 ? I have often also experienced that pressing simple F5 and pressing the refresh button on browser also generate different results. Can any body tell me what is the basic difference among all these requests. 回答1: CTRL + F5 Reloads the

问题 For a science project I'd need to render/display a BPMN 2.0 model in a web browser. Are there any libraries available to only render the diagram? (I don't need to edit it or do anything other than displaying it). Bonus points if said library is also able to render/display petri nets. The solution should be open source. Thanks! 回答1: Activiti http://activiti.org/ pretty advanced Java developed by several vendors, e.g. http://signavio.com (free for university use: http://academic.signavio.com/ )

问题 I'm using eval() to execute all <script> tags after total rewrite of a div (whose code is loaded via an XMLHttpRequest ): var arr = document.getElementById('idOfDIV').getElementsByTagName('script'); for (var n = 0; n < arr.length; n++){ try { eval(arr[n].innerHTML); } catch(err) { console.log(err); } } It works well for inline-scripts, but has no effect on scripts like: <script src="/path/to/externalScript.js"></script> How come? Can I "force" the browser to load and execute also the external

问题 I would like to be able to programmatically invoke the right-click menu options, initiated from user events like rollover and whatnot of course. Is this possible? Specifically, I would like to be able to call the Safari "Use Image as Desktop Picture" or the "Add Image to iPhoto Library", or the Firefox "Set as Desktop Background" using pure Javascript, so you don't have to right click. Is that possible? 回答1: You can't and this is because of security limitations. If you could do that,