Using Existing UI Systems Inside React: A Practical Approach

Migrating to React doesn’t always mean starting from scratch. Many teams already have mature UI systems built with other frameworks. Rewriting everything — especially complex components like data grids, forms, and dashboards — can be time-consuming and risky. This is where integration approaches come in. Instead of replacing everything, developers can reuse existing UI components inside a Rapid Application Development Tools . For example, structured component systems like Ext JS can be integrated into React, allowing teams to keep proven, feature-rich components while adopting modern workflows. This approach offers a few clear benefits: Reduces rewrite effort Preserves tested UI components Speeds up migration timelines Maintains performance for data-heavy features However, it’s not completely frictionless. Proper state synchronization and component lifecycle handling are important to ensure smooth interaction between systems. In many real-world cases, combining React with an existing U