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The Complete Guide to Feature Flags in Modern Software Development

· 4 min read
Vitor
Front End Engineer @

Feature flags, also known as feature toggles or feature switches, have revolutionized how modern development teams deploy and manage software features. Whether you're building with React, Node.js, Angular, Vue, or React Native, feature flags provide the flexibility and control every development team needs.

What Are Feature Flags?

Feature flags are conditional statements in your code that allow you to enable or disable features without deploying new code. Think of them as remote-controlled switches for your application's functionality.

// Example in React
function Dashboard() {
const { isFeatureEnabled } = useFeatureFlags();

return (
<div>
<h1>Dashboard</h1>
{isFeatureEnabled("newAnalytics") && <AdvancedAnalytics />}
{isFeatureEnabled("betaChat") && <ChatWidget />}
</div>
);
}