google-chrome

问题 When I am running python scripts to test a website on Headless Chrome Broswer (Webdriver + Selenium ), we often get a timeout error, I found out the problem occurred when script interacted with browser by .click() or .send_keys() methods. Can anyone know what the kind of problem it is? Sometimes it is working fine but sometimes I have got timeout error. Please give a solution for the same Stack trace: 15:01:48,194 root:ERROR: ERROR occurred: Message: timeout (Session info: headless chrome=60

问题 Since a recent update to chrome, the presets are no longer labelled with bandwidth. Chrome used to list the actual speed of each one so you could simply tell. What bandwidth or latency do the options here represent? 回答1: I did some measurements with two speed tests available in the internet. With the following custom profile I received similar download speed and ping latency as with the presets. Slow 3G Custom: Download 376 kb/s, Latency 2000 ms Fast 3G Custom: Download 1500 kb/s = 1.5 Mb/s,

问题 Since a recent update to chrome, the presets are no longer labelled with bandwidth. Chrome used to list the actual speed of each one so you could simply tell. What bandwidth or latency do the options here represent? 回答1: I did some measurements with two speed tests available in the internet. With the following custom profile I received similar download speed and ping latency as with the presets. Slow 3G Custom: Download 376 kb/s, Latency 2000 ms Fast 3G Custom: Download 1500 kb/s = 1.5 Mb/s,

问题 I found some similar questions but they do not fully respond to the one I have, here is the list that I hope will help someone else: What's the difference between a browser engine, a rendering engine and a user agent? Difference between layout engine and javascript engine As explained here https://www.html5rocks.com/en/tutorials/internals/howbrowserswork/ The browser engine: marshals actions between the UI and the rendering engine. The rendering engine: responsible for displaying requested

问题 I found some similar questions but they do not fully respond to the one I have, here is the list that I hope will help someone else: What's the difference between a browser engine, a rendering engine and a user agent? Difference between layout engine and javascript engine As explained here https://www.html5rocks.com/en/tutorials/internals/howbrowserswork/ The browser engine: marshals actions between the UI and the rendering engine. The rendering engine: responsible for displaying requested

问题 Chrome 76 has added support for prefers-color-scheme media query (a.k.a. "dark mode"). But how can I test my webpage in both color schemes easily, without toggling the system dark mode on and off? Here is the same question for Firefox, but I can't find similar settings in Chrome & Chrome DevTools. 回答1: Since Chrome version 79 you can toggle between prefers-color-scheme: dark and prefers-color-scheme: light from the Rendering panel Open Developer tools (otherwise the key combination below

问题 Chrome 76 has added support for prefers-color-scheme media query (a.k.a. "dark mode"). But how can I test my webpage in both color schemes easily, without toggling the system dark mode on and off? Here is the same question for Firefox, but I can't find similar settings in Chrome & Chrome DevTools. 回答1: Since Chrome version 79 you can toggle between prefers-color-scheme: dark and prefers-color-scheme: light from the Rendering panel Open Developer tools (otherwise the key combination below

问题 Chrome 76 has added support for prefers-color-scheme media query (a.k.a. "dark mode"). But how can I test my webpage in both color schemes easily, without toggling the system dark mode on and off? Here is the same question for Firefox, but I can't find similar settings in Chrome & Chrome DevTools. 回答1: Since Chrome version 79 you can toggle between prefers-color-scheme: dark and prefers-color-scheme: light from the Rendering panel Open Developer tools (otherwise the key combination below

问题 var testSet = new Set(); testSet.add(1); testSet.add(2); chrome.storage.local.set( { 'key': testSet }, function() { chrome.storage.local.get( 'key', function(data){ console.log(data) }); }); This outputs Object {key: Object} key: Object__proto__: Object__proto__: Object Why doesn't it show the testSet values in there? 回答1: One way to achieve this, is by converting your Set into an array by using Spread Operator. E.g. var testSet = new Set(); testSet.add(1); testSet.add(2); chrome.storage

问题 var testSet = new Set(); testSet.add(1); testSet.add(2); chrome.storage.local.set( { 'key': testSet }, function() { chrome.storage.local.get( 'key', function(data){ console.log(data) }); }); This outputs Object {key: Object} key: Object__proto__: Object__proto__: Object Why doesn't it show the testSet values in there? 回答1: One way to achieve this, is by converting your Set into an array by using Spread Operator. E.g. var testSet = new Set(); testSet.add(1); testSet.add(2); chrome.storage