browser

问题 Suppose I have a website in which I have customized fonts, and all the .otf files are about 1MB. Now, when a user visits the website, the fonts will be downloaded. The question is, will these fonts remain in the user's browser as installed all the time? I.e. Even if the user turns off the browser, will the fonts remain in there? Or are .otf files just like all the .css .html files? Which can be cached but then need to be downloaded again? If the latter, how do we deal with this problem? I

问题 Is there a way to make a browser aware of iBeacon devices in its proximity? Similar to the way HTML5 Geolocation is working... If not would this be something that can be achieved with a browser plug-in that can provide the detail to be consumed by javascript? 回答1: Unfortunately, no. No web browsers have implemented any bridges between beacon detection and JavaScript. I don't think a plugin approach is possible on mobile browsers (either iOS or Android), because neither browser supports

问题 Is there a way to make a browser aware of iBeacon devices in its proximity? Similar to the way HTML5 Geolocation is working... If not would this be something that can be achieved with a browser plug-in that can provide the detail to be consumed by javascript? 回答1: Unfortunately, no. No web browsers have implemented any bridges between beacon detection and JavaScript. I don't think a plugin approach is possible on mobile browsers (either iOS or Android), because neither browser supports

问题 In my html page I have multiple text inputs. Every time I enter values in them it shows me previously entered values. Is it due to browser property or html? how do I disable it? 回答1: Always the better appraoch is to give form autocomplete="off" <form autocomplete="off"> <input type="text" id="text1"> <input type="text" id="text2"> </form> Then only newer versions of Eclipse support HTML5 tags such as autocomplete else it will show warning... 回答2: Just set the autocomplete property of your

问题 Image Notification In the google chrome version 30.0.1599.101 m i am not able to save the changed js file. On saving the js file i got yellow triangle symbol with "change to this file were not saved to file system" message. I know this used to work in older version I am using windows-7 64 bit 回答1: Click on the cog in the developer tools window (lower right corner) Go to workspace and add the directory which you would be working on. This is to accidentally prevent you from modifying files that

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 8 years ago . Last year I spent a long time reading up on javascript performance, bottlenecks and best practices. On my latest project I'm using

问题 I'm debugging R code with browser(). The function pauses the execution of the current R script and allows for inspection. Is it possible to enable/disable the debug mode on the fly, during the execution? With large scripts it would be very handy. Thanks 回答1: Your question prompted me to read ?browser . The documentation says you can use the expr= argument to browser to create (the illusion) of conditional debugging. That, combined with a global option should give you what you want. foo <-

问题 I have the following html5 code: <canvas id="myCanvas" width=600 height=600> </canvas> followed by some javascript: <script type="text/javascript"> <!-- var img = new Image(); img.addEventListener('load', function() { reDraw('', this); }, false); img.src = "wood.png"; function reDraw(canv, image) { var canvas = canv; if (canvas == '') { canvas = $("canvas"); } var size = canvas.attr("width"); var elem = canvas.get(0); if (!elem || !elem.getContext){ return; } var context = elem.getContext('2d

问题 I've tried following code in ie, firefox and node.js var x = 10; var o = { x: 15 }; function f(){ console.log(this.x); } f(); f.call(o); the results in browsers are 10, 15, but the result in node.js is undefined, 15. Please explain to me what is the different behavior of “this” keyword in browsers and node.js? I've read many pages but there wasn't any obvious answer. Thanks in advance. 回答1: Javascript files loaded in Nodejs are automatically wrapped in anonymous functions. So in Node what you

问题 Is it possible for me to programmatically access a smartphone's sensors (e.g. accelerometer, compass, etc. on an Android or iPhone device) through a browser webpage and JavaScript? I know that the W3C Devices standard can allow access to the camera. 回答1: HTML5 is likely to contain a sensor API. Until this is fully standardized, vendors provide their own APIs such as Apple does for mobile Safari. There's no need for full blown solutions like PhoneGap or similar if it is Ok for you to restrict