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  1. Debug for IE mobile on Windows Phone using Desktop's IE developer tools

    Just like it happens for OSX/iOS, where attaching a device via USB allows to use desktop safari to inspect mobile safari and webviews on the mobile.

    I know weinre was recently adapted to be usable on IE mobile too but it's hardly a complete solution for serious development, lacking support for breakpoints, CSS pseudo-element.

    Not to mention that I did encounter really strange behaviors of the DOM inspection panel based on when the weinre resources are loaded during JavaScript execution, something that is not acceptable to develop modern SPA web application.

    542 votes
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      9 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
    • F12 emulation of slow network connections

      This feature would enable the emulation of different network connections such as 3G, 4G etc... changing network throughput, latency and packet loss to match typical conditions for that type of network.

      Proposed Design
      - Impacts just the page being debugged
      - Dropdown on emulation tool to select from the different connection options (exact list tbd)
      - Fits in with the persistence of the rest of the emulation settings

      264 votes
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        2 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
      • Display WebSocket data

        This feature allows the network tool to display websocket data.

        Proposed Design
        -Mark HTTP requests that are upgraded to WS in the summary grid
        -Add a WS Frames tab in the details view to display the data
        -Frames panel displays plains text data and calls out binary opcodes and origin of the data

        176 votes
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          0 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
        • Show syntax errors in debugger

          This feature would expose syntax errors to a developer who has a file open in the F12 debugger.

          Proposed Design
          - If a JavaScript file containing syntax errors is opened in the debugger the syntax error will have a red squiggle and there will be a warning glyph in the gutter

          174 votes
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            0 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
          • indexedDB explorer in dev-tools

            It would be nice to see the indexedDB database in dev-tools.
            Think about:
            * Version
            * ObjectStores
            * Data in objectstores
            * Indexes for objectstores

            163 votes
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              2 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
            • Edit and Continue

              This feature would add the ability to edit JavaScript code when stopped in the debugger then to continue (or step) and execute the modified code.

              Proposed Design
              - Will have a number of limitations (e.g. not applicable to eval code)
              - Will not modify the state of the DOM/Objects/Closures etc.

              152 votes
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                3 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →

                We’ve started work on edit and continue in the F12 debugger. It’s going to take us a while as it’s a complex feature with many moving parts. The first part we’ll tackle is applying changes when you’re not at a breakpoint. So you could do something such as editing an event listener then trigger the event again. No dates for when, or if, we’ll be able to deliver it.

              • Security Tab - to show TLS/SSL, CSP, SRI, etc features

                Add a "Security" tab to highlight features that the browser provides.

                e.g. most developers have no idea what a CSP (Content Security Policy) header is... and even if implemented, the only way to view it is though the network headers (not easy to read).

                This new tab can help list features, and make suggestions on how to make improvements (e.g. adding HSTS, or HPKP, or X-XSS-Protection, or X-Frame-Options headers).

                https://status.modern.ie/httpstricttransportsecurityhsts
                https://status.modern.ie/contentsecuritypolicy
                https://status.modern.ie/iframesandboxattribute

                I've started making a mockup on GitHub, so you can click around to see what could be included (I bet there is at least one thing on there…

                150 votes
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                  0 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                • JavaScript Source Mapping

                  It could be extremely helpful to have the ability of editing JavaScript code in debug mode in F12 Developer Tools and have the code changes applied to the source file when saving it in dev tools.

                  136 votes
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                    1 comment  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                  • Better Emulate previous versions of IE!

                    Improve Emulation tool to accurately represent how the CSS is rendered in previous versions of IE. People still use IE9-11, and they are all handle CSS in non-standard ways.

                    111 votes
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                      6 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                    • Better support for evaluated code source maps (SystemJS)

                      SystemJS is a polyfill for and extension to the ES6/ES2015 Module Loader (System). It tries its best to pass along Source Maps and Chrome today works alright with SystemJS, but today IE/Edge doesn't seem able to work with these source files. Some of this might be assuaged as IE/Edge implements the ES6/ES2015 Module Loader, but until such time, it would be great if the Dev Tools supported Source Maps in the way that SystemJS is outputting them in a stronger fashion.

                      For reference, the issue tracking this on the SystemJS side is: https://github.com/systemjs/systemjs/issues/450

                      97 votes
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                        2 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                      • console.table

                        It provides a way to display an array or an object as a table in Console.

                        https://developer.mozilla.org/en-US/docs/Web/API/Console.table

                        95 votes
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                          1 comment  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                        • 91 votes
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                            6 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                          • Add folders to F12 Dev Tool Script Sources

                            When you're working with multiple scripts, especially with source maps (eg from TypeScript) Google Chrome dev tools shows a folder structure in the left hand side of the sources tab. IE F12 developer tools just shows a list of all the .js files.....

                            This is incredibly difficult to navigate! Especially if you have two or more files with the same name, in different folders (for us, it's _index.js and _module.js)....

                            Can you please add a folder like tree structure, mimicking the behaviour in Chrome Dev Tools?

                            77 votes
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                              3 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                            • Force Active and Focus Pseudo States

                              This feature would add the ability to set the focus and active pseudo states from the DOM Explorer pseudo state checkboxes.

                              Proposed Design
                              - New checkboxes on the pseudo state toggles
                              - Would not fire any JavaScript events (e.g. focus, blur)
                              - Force on only no force off (off toggle state will follow browser default)

                              73 votes
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                                2 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                              • Need a way to detect Enterprise Mode from client side code.

                                Need a way to detect Enterprise Mode from client side code

                                71 votes
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                                  1 comment  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                                • @media print emulation

                                  There is currently, as far as I can see, no way to view the layout of printed document and the CSS styles that will be applied when printed. In Chrome you can choose to emulate @media print mode and inspect the document.

                                  I am trying to debug why the text of a document printed from Chrome and IE11 has such wildly different text sizes but I cannot trace the font-size styles in IE to compare it to the font-size in Chrome.

                                  67 votes
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                                    1 comment  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                                  • DOM Mutation breakpoints

                                    This feature would add the ability to break on a JavaScript statement that is modifying an element, or its children, in the DOM Explorer via a context menu.

                                    Proposed Design
                                    - Context menu item in DOM Explorer
                                    - Breakpoint glyph in DOM Explorer will indicate nodes with a breakpoint bound
                                    - Breakpoint is added to and managed from the debugger breakpoints window
                                    - Binding across refresh is done based on a selector (determined when breakpoint is added)
                                    - The mutation itself can not be changed

                                    61 votes
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                                      0 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Add the F12 tool to the mobile version of Edge

                                      Nowadays many of us test on the phone to, so please let us get access to f12 on mobile to. Would be so nice to inspect elements on the mobile to!!

                                      55 votes
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                                        1 comment  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                                      • Debugging capabilities using the remote debugging protocol

                                        Build upon the remote debugging protocol (https://developer.chrome.com/devtools/docs/debugger-protocol) to allow developers to use existing, familiar, developer tools.

                                        Then continue to openly build debugging innovations on the web platform based on the protocol, collaborating with other browser vendors to make it moving between browsers an easier experience.

                                        54 votes
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                                          5 comments  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
                                        • 50 votes
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                                            1 comment  ·  F12 Developer Tools  ·  Flag idea as inappropriate…  ·  Admin →
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