36 lines
1.3 KiB
JavaScript
36 lines
1.3 KiB
JavaScript
/**
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* Use invariant() to assert state which your program assumes to be true.
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*
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* Provide sprintf-style format (only %s is supported) and arguments
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* to provide information about what broke and what you were
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* expecting.
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*
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* The invariant message will be stripped in production, but the invariant
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* will remain to ensure logic does not differ in production.
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*/ export function invariant(condition, format, ...args) {
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if (isProduction()) {
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if (format === undefined) {
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throw new Error('invariant requires an error message argument');
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}
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}
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if (!condition) {
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let error;
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if (format === undefined) {
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error = new Error('Minified exception occurred; use the non-minified dev environment ' + 'for the full error message and additional helpful warnings.');
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} else {
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let argIndex = 0;
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error = new Error(format.replace(/%s/g, function() {
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return args[argIndex++];
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}));
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error.name = 'Invariant Violation';
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}
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error.framesToPop = 1 // we don't care about invariant's own frame
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;
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throw error;
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}
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}
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function isProduction() {
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return typeof process !== 'undefined' && process.env['NODE_ENV'] === 'production';
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}
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//# sourceMappingURL=index.js.map
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