xiaoshi-wx/node_modules/wux-weapp/packages/es/helpers/libs/warning.js

/**
 * Copyright (c) 2014-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */



/**
 * Similar to invariant but only logs a warning if the condition is not met.
 * This can be used to log issues in development environments in critical
 * paths. Removing the logging code for production environments will keep the
 * same logic and follow the same code paths.
 */

// var __DEV__ = typeof process !== 'undefined' && process.env && process.env.NODE_ENV !== 'production';
var __DEV__ = true;

var warning = function() {};

if (__DEV__) {
    var printWarning = function printWarning(format, args) {
        var len = arguments.length;
        args = new Array(len > 1 ? len - 1 : 0);
        for (var key = 1; key < len; key++) {
            args[key - 1] = arguments[key];
        }
        var argIndex = 0;
        var message = 'Warning: ' +
      format.replace(/%s/g, function() {
          return args[argIndex++];
      });
        if (typeof console !== 'undefined') {
            console.error(message);
        }
        try {
            // --- Welcome to debugging React ---
            // This error was thrown as a convenience so that you can use this stack
            // to find the callsite that caused this warning to fire.
            throw new Error(message);
        } catch (x) {}
    }

    warning = function(condition, format, args) {
        var len = arguments.length;
        args = new Array(len > 2 ? len - 2 : 0);
        for (var key = 2; key < len; key++) {
            args[key - 2] = arguments[key];
        }
        if (format === undefined) {
            throw new Error(
                '`warning(condition, format, ...args)` requires a warning ' +
          'message argument'
            );
        }
        if (!condition) {
            printWarning.apply(null, [format].concat(args));
        }
    };
}

export default warning;