Unable to fix signing identity issue on Xcode
It’s a propagation server issue. Wait approximately 10 minutes and it will be fixed.
developer-tools
Trim trailing spaces in Xcode
Starting from Xcode 4.4 whitespaces will be trimmed automatically by default, unless the line is all whitespace. You can also activate Including whitespace-only lines to fix this, which is not active by default. Go to Xcode > Preferences > Text Editing > While editing
Is it possible to see which srcset image a browser is using with browser developer tools
The image has a property currentSrc, you can log it or inspect it with several tools: In chrome developer tools inspect the element, then click the properties tab. In Firefox developer tools inspect the element, right click and select DOM from the context menu. You will see an entry for currentSrc: with the actual image … Read more
Google Developer Tools “Network” Tab clears after redirect
In the network tab of dev tools, on the top left of the dev tools there should be a checkbox labelled Preserve log. Click that and it will preserve network upon navigation. (older versions may have the record button in the buttom left, as seen here)
How can I reduce the waiting (ttfb) time
The TTFB is not the time to first byte of the body of the response (i.e., the useful data, such as: json, xml, etc.), but rather the time to first byte of the response received from the server. This byte is the start of the response headers. For example, if the server sends the headers … Read more
Chrome Developer Tools: How to find out what is overriding a CSS rule?
Use the Computed Style panel of the element inspector. Expand the property of interest to see the list of applicable rules, and which one won.
What does status=canceled for a resource mean in Chrome Developer Tools?
We fought a similar problem where Chrome was canceling requests to load things within frames or iframes, but only intermittently and it seemed dependent on the computer and/or the speed of the internet connection. This information is a few months out of date, but I built Chromium from scratch, dug through the source to find … Read more