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26 changes: 19 additions & 7 deletions packages/browser/src/utils/env.ts
Original file line number Diff line number Diff line change
@@ -1,17 +1,14 @@
/**
* Safely gets an environment variable value with defensive guards for browser environments.
* Checks process.env which is transformed by most bundlers (Webpack, Vite, Rollup, Rspack, Parcel, etc.)
* at build time.
*
* Note: We don't check import.meta.env because:
* 1. Bundlers only replace static references like `import.meta.env.VITE_VAR`, not dynamic access
* 2. Dynamic access causes syntax errors in unsupported environments
* 3. Most bundlers transform process.env references anyway
* Checks both process.env and import.meta.env to support different bundlers:
* - process.env: Webpack, Next.js, Create React App, Parcel
* - import.meta.env: Vite, Astro, SvelteKit
*
* @param key - The environment variable key to look up
* @returns The value of the environment variable or undefined if not found
*/
export function getEnvValue(key: string): string | undefined {
// Check process.env first (Webpack, Next.js, CRA, etc.)
try {
if (typeof process !== 'undefined' && process.env) {
const value = process.env[key];
Expand All @@ -23,5 +20,20 @@ export function getEnvValue(key: string): string | undefined {
// Silently ignore - process might not be accessible or might throw in some environments
}

// Check import.meta.env (Vite, Astro, SvelteKit, etc.)
try {
// @ts-expect-error import.meta.env might not exist in all environments
if (typeof import.meta !== 'undefined' && import.meta.env) {
// @ts-expect-error import.meta.env is typed differently in different environments
// eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
const value = import.meta.env[key];
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Bug: Vite: Dynamic Env Var Access Not Supported

The dynamic access import.meta.env[key] won't work in Vite-based frameworks. Vite performs static replacement at build time for literal property accesses like import.meta.env.VITE_VAR, but doesn't create a runtime object that supports bracket notation with variables. This means environment variables in Vite, Astro, and SvelteKit will never be retrieved despite the PR's intent to fix this compatibility issue.

Fix in Cursor Fix in Web

if (value !== undefined) {
return value;
}
}
} catch (e) {
// Silently ignore - import.meta.env might not be accessible or might throw
}

return undefined;
}
1 change: 1 addition & 0 deletions packages/browser/src/utils/spotlightConfig.ts
Original file line number Diff line number Diff line change
Expand Up @@ -61,5 +61,6 @@ export function getSpotlightConfig(): boolean | string | undefined {
}

// No Spotlight configuration found in environment
// Note: Implicit return of undefined saves bytes and is tree-shaken in production builds
return undefined;
}
15 changes: 7 additions & 8 deletions packages/browser/test/utils/env.test.ts
Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,6 @@ describe('getEnvValue', () => {
if (originalProcess !== undefined) {
globalThis.process = originalProcess;
} else {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
delete (globalThis as any).process;
}
});
Expand All @@ -28,14 +27,12 @@ describe('getEnvValue', () => {
env: {
TEST_VAR: 'test-value',
},
// eslint-disable-next-line @typescript-eslint/no-explicit-any
} as any;

expect(getEnvValue('TEST_VAR')).toBe('test-value');
});

it('returns undefined when process.env does not exist', () => {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
delete (globalThis as any).process;

expect(getEnvValue('NONEXISTENT')).toBeUndefined();
Expand All @@ -44,22 +41,19 @@ describe('getEnvValue', () => {
it('returns undefined when variable does not exist in process.env', () => {
globalThis.process = {
env: {},
// eslint-disable-next-line @typescript-eslint/no-explicit-any
} as any;

expect(getEnvValue('NONEXISTENT')).toBeUndefined();
});

it('handles missing process object gracefully', () => {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
delete (globalThis as any).process;

expect(() => getEnvValue('TEST_VAR')).not.toThrow();
expect(getEnvValue('TEST_VAR')).toBeUndefined();
});

it('handles missing process.env gracefully', () => {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
globalThis.process = {} as any;

expect(() => getEnvValue('TEST_VAR')).not.toThrow();
Expand All @@ -71,7 +65,6 @@ describe('getEnvValue', () => {
get env() {
throw new Error('Access denied');
},
// eslint-disable-next-line @typescript-eslint/no-explicit-any
} as any;

expect(() => getEnvValue('TEST_VAR')).not.toThrow();
Expand All @@ -83,9 +76,15 @@ describe('getEnvValue', () => {
env: {
EMPTY_VAR: '',
},
// eslint-disable-next-line @typescript-eslint/no-explicit-any
} as any;

expect(getEnvValue('EMPTY_VAR')).toBe('');
});

// Note: import.meta.env support cannot be easily unit tested because import.meta
// is a read-only compile-time construct that cannot be mocked. The import.meta.env
// functionality is tested via e2e tests with real Vite-based frameworks (Vue, Astro, etc.)
//
// The implementation safely checks for import.meta.env existence and will use it
// when available in Vite/Astro/SvelteKit builds.
});
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