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
36 git clone https://git.webkit.org/git/WebKit.git WebKit
39 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.
42 Tools/Scripts/webkit-patch setup-git-clone
45 For information about this, and other aspects of using Git with WebKit, read [the wiki page](https://trac.webkit.org/wiki/UsingGitWithWebKit).
47 ### Checking out the Subversion Repository
49 If you don't want to use Git, run the following command to check out WebKit's Subversion repository:
52 svn checkout https://svn.webkit.org/repository/webkit/trunk WebKit
57 ### Building macOS Port
59 Install Xcode and its command line tools if you haven't done so already:
61 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.
62 2. **Install the Xcode Command Line Tools** In Terminal, run the command: `xcode-select --install`
64 Run the following command to build a debug build with debugging symbols and assertions:
67 Tools/Scripts/build-webkit --debug
70 For performance testing, and other purposes, use `--release` instead.
74 You can open `WebKit.xcworkspace` to build and debug WebKit within Xcode.
76 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.
80 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:
83 sudo Tools/Scripts/configure-xcode-for-ios-development
86 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`.
88 Run the following command to build a debug build with debugging symbols and assertions for iOS:
91 Tools/Scripts/build-webkit --debug --ios-simulator
94 ### Building the GTK+ Port
96 For production builds:
99 cmake -DPORT=GTK -DCMAKE_BUILD_TYPE=RelWithDebInfo -GNinja
104 For development builds:
107 Tools/gtk/install-dependencies
108 Tools/Scripts/update-webkitgtk-libs
109 Tools/Scripts/build-webkit --gtk --debug
112 For more information on building WebKitGTK+, see the [wiki page](https://trac.webkit.org/wiki/BuildingGtk).
114 ### Building the WPE Port
116 For production builds:
119 cmake -DPORT=WPE -DCMAKE_BUILD_TYPE=RelWithDebInfo -GNinja
124 For development builds:
127 Tools/wpe/install-dependencies
128 Tools/Scripts/update-webkitwpe-libs
129 Tools/Scripts/build-webkit --wpe --debug
132 ### Building Windows Port
134 For building WebKit on Windows, see the [wiki page](https://webkit.org/webkit-on-windows/).
138 ### With Safari and Other macOS Applications
140 Run the following command to launch Safari with your local build of WebKit:
143 Tools/Scripts/run-safari --debug
146 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`.
148 To run other applications with your local build of WebKit, run the following command:
151 Tools/Scripts/run-webkit-app <application-path>
156 Run the following command to launch iOS simulator with your local build of WebKit:
159 run-safari --debug --ios-simulator
162 In both cases, if you have built release builds instead, use `--release` instead of `--debug`.
166 If you have a development build, you can use the run-minibrowser script, e.g.:
169 run-minibrowser --debug --wpe
172 Pass one of `--gtk`, `--jsc-only`, or `--wpe` to indicate the port to use.
176 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/).