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fix: safe FormData detection for WeChat Mini Program (#7306) - #7324
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Hi maintainers 👋, this PR fixes issue #7306 by safely detecting FormData in WeChat Mini Programs. |
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jasonsaayman
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Feb 14, 2026
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Thank you for reviewing and merging this PR. Happy to see this fix helping Axios users in WeChat Mini Programs. |
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Problem:
Axios throws "TypeError: Cannot read property 'FormData' of undefined" in WeChat Mini Program environments because it directly accesses self/window.FormData. These globals are not available in that environment, causing a crash on import.
Fix:
Introduce safe global detection (globalThis → self → window → global) and guard FormData usage via FormDataCtor. This ensures Axios does not crash when FormData is absent, while preserving existing behavior in browsers and Node.js.
Tests:
All unit and browser tests pass locally. The change is a pure JS guard and does not alter behavior in environments where FormData exists.
Code change: