mirror of
https://github.com/facebook/react.git
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c080537a7b
* shared/src -> shared It's not a real package and doesn't even have package.json. This will also make importing less weird if we drop Haste. * Get rid of shared/utils Moved event-specific into shared/event. Moved rest to the root since distinction has always been pretty arbitrary. * Fix references to old shared/src paths
57 lines
1.7 KiB
JavaScript
57 lines
1.7 KiB
JavaScript
/**
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* Copyright (c) 2014-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @providesModule lowPriorityWarning
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*/
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'use strict';
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/**
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* Forked from fbjs/warning:
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* https://github.com/facebook/fbjs/blob/e66ba20ad5be433eb54423f2b097d829324d9de6/packages/fbjs/src/__forks__/warning.js
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*
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* Only change is we use console.warn instead of console.error,
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* and do nothing when 'console' is not supported.
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* This really simplifies the code.
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* ---
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* Similar to invariant but only logs a warning if the condition is not met.
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* This can be used to log issues in development environments in critical
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* paths. Removing the logging code for production environments will keep the
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* same logic and follow the same code paths.
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*/
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var lowPriorityWarning = function() {};
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if (__DEV__) {
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const printWarning = function(format, ...args) {
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var argIndex = 0;
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var message = 'Warning: ' + format.replace(/%s/g, () => args[argIndex++]);
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if (typeof console !== 'undefined') {
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console.warn(message);
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}
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try {
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// --- Welcome to debugging React ---
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// This error was thrown as a convenience so that you can use this stack
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// to find the callsite that caused this warning to fire.
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throw new Error(message);
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} catch (x) {}
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};
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lowPriorityWarning = function(condition, format, ...args) {
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if (format === undefined) {
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throw new Error(
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'`warning(condition, format, ...args)` requires a warning ' +
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'message argument',
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);
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}
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if (!condition) {
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printWarning(format, ...args);
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}
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};
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}
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module.exports = lowPriorityWarning;
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