google-chrome-devtools | 易学教程

How can I view network requests (for debugging) in React Native?

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问题 I\'d like to view my network requests in React Native to help me debug - ideally in the \'Network\' tab of Chrome\'s devtools. There are some closed issues about this on GitHub (https://github.com/facebook/react-native/issues/4122 and https://github.com/facebook/react-native/issues/934) but I don\'t entirely understand them. It sounds like I need to undo some of React Native\'s polyfills and then run some commands with extra debugging flags, and maybe modify some Chrome security settings? And

How to use Chrome's network debugger with redirects

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问题 The Chrome network debugger gives me a great view of all the HTTP resources loaded for a page. But it clears the list whenever a new top-level HTML page is loaded. This makes it very difficult to debug pages that automatically reload for one reason or another (running script or 300 responses). Can I tell Chrome not to clear the network debugger when a new top-level page is loaded? Or can I go back and look at the previous page\'s network resources? Or can I somehow force Chrome to pause

Chrome console already declared variables throw undefined reference errors for let

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问题 Recently I ran into this weird thing in chrome console. Here I am intentionally assigning an undefined thing to a in order to throw an error. let a = werwr // Uncaught ReferenceError: werwr is not defined Then when I tried to assign something legit to a, this happened: let a = \"legit string\" // Uncaught SyntaxError: Identifier \'a\' has already been declared so I can\'t use \"let\" because a has already been declared. So I tried to reassign something else to the \"already declared a\" a = \

JSON response format error - red dot\bullet before response

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问题 I am sending an AJAX request expecting JSON response. However, the returned JSON is preceded with a red dot\\bullet which is causing a parse error. Here is a screenshot from Postman : The dot is not shown on Raw or Preview display, only on Pretty . In Chrome Dev Tools Network tab it appears under Response . Preview is shown normally as if the dot isn\'t there. 回答1: As mentioned in a comment before: In Chrome, red dots usually represent non-printable special unicode characters. Please check

How to change chrome packaged app id Or Why do we need key field in the manifest.json?

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I'm developing packaged app for chrome store using one-time chrome wallet payments. For my app I need to check during the runtime if user bought the app or not to decide should it be demo functionality or full functionality. According to the chrome identity API documentation : to keep application ID constant, You need to copy the key in the installed manifest.json to your source manifest. I have 2 questions about this procedure: 1) under what condition the id of my application may change? I've tried to re-install the app and made updates but the apps id remains the same.. If there is no way to

Chrome Development Tool: [VM] file from javascript

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I added a breakpoint in my javascript file (jaydata.js) and was pressing "Step over to the next function call." When it got to a line that was: }, another file titled "[VM] (8312)" popped up. I kept clicking "Step over to the next function call" and now my screen is: What are these strange and mysterious scripts titled "[VM](XXXX " and where do they come from? Rob W [VM] (scriptId) has no special meaning. It's a dummy name to help us to distinguish code which are not directly tied to a file name, such as code created using eval and friends. In the past, all of these scripts were just labelled

How to inject javascript into Chrome DevTools itself

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问题 Ok, so just the other day I learned that you can inspect the devtools if it is in its own window(explained here). I also learned that you can style the devtools with your own css by editing the Custom.css file in your profile on your computer(more on that here). What I want to do is not only add css, but also javascript, via a chrome extension. I am very aware of devtools pages, but those do not do what I want. Pretty much I want to get a content script to run on the devtools inspector itself

Load chrome extension using selenium

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问题 All I want is to load a chrome extension from web store. I do a lot of search to figure it out, but only got to know we can load extension from local machine. I really wonder if selenium does not have the functionality to load extension from web store or from a URL. Please let me know what I am trying is possible using selenium ? 回答1: I am not sure why you are particular about downloading from Webstore and then install into Chrome. I found some steps to download chrome extensions: -With a

How to debug angular app using angular-cli webpack?

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问题 I used angular-cli@1.0.0-beta.10 before and now I updated to angular-cli@webpack beta.11. After a lot of custom changes I got it to work. The only thing is that now I can not debug my angular app using webstorm and chrome debugger because I don\'t get any ts files using ng serve. With angular-cli@1.0.0-beta.10 it was very easy to debug my app using the Jetbrains Plugin. How can I debug my angular app with Webstorm and the Chrome Debugger using ng serve? 回答1: How to debug with angular/cli The

sending message to chrome extension from a web page

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问题 I want to send message from the console of the random web page to my chrome extension. chrome.extension.sendMessage doesn\'t seem to work. 回答1: According to the official docs you should use postMessage in the sender and message event listener in the receiver. Here is an example: Your website's page.html var data = { type: "FROM_PAGE", text: "Hello from the webpage!" }; window.postMessage(data, "*"); Content script: (injected using chrome.tabs.executeScript(tabid, {code:... ) window