browser

问题 I've noticed that there appears to be a global function called $ in some browsers which is NOT jQuery, but I can't seem to find any documentation on it. What is it? Firefox: Chrome: 回答1: Chrome and Firefox dev tools include some useful shortcuts/helpers to manipulate the DOM within the console. These shortcuts are pretty similar for both: $ for DOM selection, $0 - $4 for "last X selections" and more. For full reference see: Chrome Dev Tools Command Line API - https://developers.google.com/web

问题 I search for this error but there isn't any solution to solve it. some similar questions and solutions are available but in case of 400,404 and other responses. but I've no response !! I'm using mac and my location accessing and other permissions are guaranteed browsers for using location services. So I can use my chrome or safari location services in other pages. window.navigator.geolocation.getCurrentPosition(console.log, console.log, {timeout:5000}) an easy way to access user location but

问题 Is it possible to programmatically open the web browser's native search dialogue from inside a web page? And more over, if it's possible, can I programmatically perform a search inside of it? 回答1: if you mean the browser search inside the page that's triggered using command + f or ctrl + f depending on your OS you can use the window.find() method and here is a reference for it, otherwise, if you mean the search bar which contains the URL of the website you can access its value by using window

问题 I am trying to open http://localhost in (any) browser from WSL bash terminal. So far I have tried: How can I open Google Chrome from the terminal with the URL "localhost:3000"? "Couldn't find a file descriptor referring to the console" on Ubuntu bash on Windows How to mention C:\Program Files in batchfile No luck in setting up BROWSER variable for xdg-open, it responds to xdg-open http://localhost with /usr/bin/xdg-open: 851: /usr/bin/xdg-open: /c/"Program: not found . I have tried escaping

问题 I am trying to open http://localhost in (any) browser from WSL bash terminal. So far I have tried: How can I open Google Chrome from the terminal with the URL "localhost:3000"? "Couldn't find a file descriptor referring to the console" on Ubuntu bash on Windows How to mention C:\Program Files in batchfile No luck in setting up BROWSER variable for xdg-open, it responds to xdg-open http://localhost with /usr/bin/xdg-open: 851: /usr/bin/xdg-open: /c/"Program: not found . I have tried escaping

问题 I'm talking about an icon that is displayed on a tab during page loading. Chrome: Firefox (with TreeTab plugin): You get the idea. I want to make it seem like the page is loading, when it's already loaded. Some event fires is javascript and then the tab looks like it's being loaded. Is there a way to do that? One way I can think of is to replace a favicon with a spinner, but I'm not sure if it's possible to change on the fly and even if it is, it would be a hassle to make it cross-browser.

问题 With browser Web API, I'd like to set MediaDevices.getUserMedia constraints attributes, suitable to record audio speech (voice messages), e.g. setting these parameters: mono 16bit 16KHz Here my code: const mediaStreamConstraints = { audio: { channelCount: 1, sampleRate: 16000, sampleSize: 16, volume: 1 }, video: false } navigator.mediaDevices.getUserMedia(mediaStreamConstraints) .catch( err => serverlog(`ERROR mediaDevices.getUserMedia: ${err}`) ) .then( stream => { // audio recorded as Blob

问题 I am using echo to display output to the browser window. I have a while loop calling a function that displays the values on a two-dimensional grid, essentially like a table. As things are, calculations are made, and the table is rendered line-by-line to the screen as those calculations are made. However, if I update the table, showing changes caused by subsequent calculations, I have to reprint the entire table below the first. I would like to return the cursor to the top-left corner and

问题 I am using echo to display output to the browser window. I have a while loop calling a function that displays the values on a two-dimensional grid, essentially like a table. As things are, calculations are made, and the table is rendered line-by-line to the screen as those calculations are made. However, if I update the table, showing changes caused by subsequent calculations, I have to reprint the entire table below the first. I would like to return the cursor to the top-left corner and

问题 Question looks simple but I couldn't find in the docs how to read a cookie with Dart on client side without 3-rd party libs. How can I do it? 回答1: In the dart:html library you can use document.cookie. This will return a String of all the cookies on the client. Each cookie is separated with a semi-colon and the key value pairs are separated with a "=" . Example; "foo=bar; otherFoo=otherBar" So it's up to you to split the String accordingly into a data type that you want to work with. Also see: