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15 lines
436 B
15 lines
436 B
var isProduction = process.env.NODE_ENV === 'production'; |
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var prefix = 'Invariant failed'; |
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function invariant(condition, message) { |
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if (condition) { |
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return; |
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} |
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if (isProduction) { |
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throw new Error(prefix); |
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} |
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var provided = typeof message === 'function' ? message() : message; |
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var value = provided ? prefix + ": " + provided : prefix; |
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throw new Error(value); |
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} |
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export { invariant as default };
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