Download the UI source
To customize the layout and functionality of the UI, you must download, rebuild, and deploy the UI project. The build process for the UI uses the Webpack resource bundler to manage dependencies, optimize deliverables, and package the output.
Ping Identity provides the source code for the UI as a Maven project in the link:https://github .com/ForgeRock/am-external[am-external] public GitHub repository.
Follow these steps to get the UI source code:
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Clone the am-externalrepository:$ git clone https://github.com/ForgeRock/am-external.git
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Check out the releases/7.2.2branch:$ cd am-external $ git checkout releases/7.2.2The End User UI project is in the am-external/openam-uifolder.
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If you don’t already have them, install the following prerequisites: You can find information on building the UI as part of a Maven workflow for deployment inside a WAR file in How do I customize the XUI using source code in PingAM?. 
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Use the yarncommand to download the dependencies to the project:$ cd openam-ui/openam-ui-user $ yarn install [1/4] 🔍 Resolving packages… [2/4] 🚚 Fetching packages… [3/4] 🔗 Linking dependencies… [4/4] 📃 Building fresh packages… ✨ Done in 9.08s.In some environments you might receive an error such as gyp ERR! not okwhen downloading dependencies.You can ignore such errors as they apply only to optional components in certain environments. You can also use the yarn install --ignore-optionalcommand to suppress these errors.