3 WebKit is a cross-platform web browser engine. On iOS and macOS, it powers Safari, Mail, iBooks, and many other applications.
7 Visit [WebKit Feature Status](https://webkit.org/status/) page to see which Web API has been implemented, in development, or under consideration.
11 On macOS, [download Safari Technology Preview](https://webkit.org/downloads/) to test the latest version of WebKit. On Linux, download [Epiphany Technology Preview](https://webkitgtk.org/epiphany-tech-preview). On Windows, you'll have to build it yourself.
15 1. [Search WebKit Bugzilla](https://bugs.webkit.org/query.cgi?format=specific&product=WebKit) to see if there is an existing report for the bug you've encountered.
16 2. [Create a Bugzilla account](https://bugs.webkit.org/createaccount.cgi) to to report bugs (and to comment on them) if you haven't done so already.
17 3. File a bug in accordance with [our guidelines](https://webkit.org/bug-report-guidelines/).
19 Once your bug is filed, you will receive email when it is updated at each stage in the [bug life cycle](https://webkit.org/bug-life-cycle). After the bug is considered fixed, you may be asked to download the [latest nightly](https://webkit.org/nightly) and confirm that the fix works for you.
23 On Windows, follow the [instructions on our website](https://webkit.org/webkit-on-windows/).
25 ### Cloning the Git SVN Repository
27 Run the following command to clone WebKit's Git SVN repository:
30 git clone git://git.webkit.org/WebKit.git WebKit
33 If you want to be able to commit changes to the repository, or just want to check out branches that aren’t contained in WebKit.git, you will need track WebKit's Subversion repository. You can run the following command to configure this and other options of the new Git clone for WebKit development.
36 Tools/Scripts/webkit-patch setup-git-clone
39 For information about this, and other aspects of using Git with WebKit, read [the wiki page](https://trac.webkit.org/wiki/UsingGitWithWebKit).
41 ### Checking out the Subversion Repository
43 If you don't want to use Git, run the following command to check out WebKit's Subversion repository:
46 svn checkout https://svn.webkit.org/repository/webkit/trunk WebKit
51 ### Building macOS Port
53 Install Xcode and its command line tools if you haven't done so already:
55 1. **Install Xcode** Get Xcode from https://developer.apple.com/downloads. To build WebKit for OS X, Xcode 5.1.1 or later is required. To build WebKit for iOS Simulator, Xcode 7 or later is required.
56 2. **Install the Xcode Command Line Tools** In Terminal, run the command: `xcode-select --install`
58 Run the following command to build a debug build with debugging symbols and assertions:
61 Tools/Scripts/build-webkit --debug
64 For performance testing, and other purposes, use `--release` instead.
68 You can open `WebKit.xcworkspace` to build and debug WebKit within WebKit.
70 If you don't use a custom build location in Xcode preferences, you have to update the workspace settings to use `WebKitBuild` directory. In menu bar, choose File > Workspace Settings, then click the Advanced button, select "Custom", "Relative to Workspace", and enter `WebKitBuild` for both Products and Intermediates.
74 The first time after you install a new Xcode, you will need to run the following command to enable Xcode to build command line tools for iOS Simulator:
77 sudo Tools/Scripts/configure-xcode-for-ios-development
80 Without this step, you will see the error message: "`target specifies product type ‘com.apple.product-type.tool’, but there’s no such product type for the ‘iphonesimulator’ platform.`" when building target `JSCLLIntOffsetsExtractor` of project `JavaScriptCore`.
82 Run the following command to build a debug build with debugging symbols and assertions for iOS:
85 Tools/Scripts/build-webkit --debug --ios-simulator.
88 ### Building the GTK+ Port
90 For production builds:
93 cmake -DPORT=GTK -DCMAKE_BUILD_TYPE=RelWithDebInfo -GNinja
98 For development builds:
101 Tools/gtk/install-dependencies
102 Tools/Scripts/update-webkitgtk-libs
103 Tools/Scripts/build-webkit --gtk --debug
106 For more information on building WebKitGTK+, see the [wiki page](https://trac.webkit.org/wiki/BuildingGtk).
108 ### Building the WPE Port
110 For production builds:
113 cmake -DPORT=WPE -DCMAKE_BUILD_TYPE=RelWithDebInfo -GNinja
118 For development builds:
121 Tools/wpe/install-dependencies
122 Tools/Scripts/update-webkitwpe-libs
123 Tools/Scripts/build-webkit --wpe --debug
126 ### Building Windows Port
128 For building WebKit on Windows, see the [wiki page](https://webkit.org/webkit-on-windows/).
132 ### With Safari and Other macOS Applications
134 Run the following command to launch Safari with your local build of WebKit:
137 Tools/Scripts/run-safari --debug
140 The `run-safari` script sets the `DYLD_FRAMEWORK_PATH` environment variable to point to your build products, and then launches `/Applications/Safari.app`. `DYLD_FRAMEWORK_PATH` tells the system loader to prefer your build products over the frameworks installed in `/System/Library/Frameworks`.
142 To run other applications with your local build of WebKit, run the following command:
145 Tools/Scripts/run-webkit-app <application-path>
150 Run the following command to launch iOS simulator with your local build of WebKit:
153 run-safari --debug --ios-simulator
156 In both cases, if you have built release builds instead, use `--release` instead of `--debug`.
160 If you have a development build, you can use the run-minibrowser script, e.g.:
163 run-minibrowser --debug --wpe
166 Pass one of `--gtk`, `--jsc-only`, or `--wpe` to indicate the port to use.
170 Congratulations! You’re up and running. Now you can begin coding in WebKit and contribute your fixes and new features to the project. For details on submitting your code to the project, read [Contributing Code](https://webkit.org/contributing-code/).