google-chrome-devtools

I am surprised that the following code when input into the Chrome js console: {} instanceof Object results in this error message: Uncaught SyntaxError: Unexpected token instanceof Can anyone please tell me why that is and how to fix it? The grammar for instanceof is: RelationalExpression instanceof ShiftExpression per ECMA-262 §11.8 . The punctuator { at the start of a statement is seen as the start of a block, so the following } closes the block and ends the statement. The following instanceof operator is the start of the next statement, but it can't be at the start because it must be

Check this image with timings for a web page fetch. There is gray at the beginning for stalled time, the green for waiting time, and the blue for receiving data. There is also a hollow, glaring nothingness in the middle.... what is that? The image is from Google Chrome 43, normal devtools. I've written up an extensive explanation in the chromium bug for it: Issue 476749: DevTools: [network] explain empty bars preceeding request .. Here's the gist, empty bar time is usually one of a few things The request was postponed because it's considered lower priority than scripts/styles (e.g. images) The

This question already has an answer here: Can I programmatically open the devtools from a Google Chrome extension? 4 answers The question might sound weird but I kind of need this to happen. The alternative would be to ask people to press Ctrl+Shift+i but I would prefer to avoid that and just provide a link. The link would show up in a Chrome Extension so I'm only interested for Google Chrome. Sorry, not likely to happen (except as a security hole). Your in-page JavaScript is deliberately sandboxed and limited - it can interact with the page, and with the network through AJAX, but it cannot

I have to check google response time using chrome devtools network for that purpose I loaded a webpage and opened the network tab to check the response time of certain websites for example for this website I there are two time quantities 1st one is the "finish" and the second one is "load" , finish is the i guess the time taken to load the whole page with all the resources including delays , what is this "load"? at first i thought if i add all these time together would add up as "load" but this isn't true , what would be considered the response time of this website, "load" or "finish"? It

I'm trying to use XWalkView in Android 5. When I try to inspect an XWalkView in chrome://inspect, I can see the name of the app that is running, but no options for inspection. I also attempted in Canary, but it never got past USB auth for debug. How can I use chrome dev tools to debug XWalkView? To debug xwalk webview remotely is similar to webview except the webview config. a. Config your chrome and device for debugging. Refer to google articles or SO post . b. Config your webivew for debugging. ( difference between webview and xwalkview ) Refer to xwalkview doc . For xwalkview,

I've entered echo.websocket.org as it was suggested, opened Network tab and WS filter in Chrome Developer Tools, but I do not see any frames. I see connection entries, but Frames tab always stays empty. Is there anything special I should do to see the frames? Screenshot: Did you send any data on the page? You need to try sending a message after clicking Connect : There is also a useful area in Chrome where you can view all your active sockets: You can access it at here: chrome://net-internals/#events&q=type:SOCKET%20is:active Update: After seeing your newly added screenshot, it looks like your