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Edit File: validator.js

'use strict';

var pkg = require('./../../package.json');

var validators = {};

// eslint-disable-next-line func-names
['object', 'boolean', 'number', 'function', 'string', 'symbol'].forEach(function(type, i) {
  validators[type] = function validator(thing) {
    return typeof thing === type || 'a' + (i < 1 ? 'n ' : ' ') + type;
  };
});

var deprecatedWarnings = {};
var currentVerArr = pkg.version.split('.');

/**
 * Compare package versions
 * @param {string} version
 * @param {string?} thanVersion
 * @returns {boolean}
 */
function isOlderVersion(version, thanVersion) {
  var pkgVersionArr = thanVersion ? thanVersion.split('.') : currentVerArr;
  var destVer = version.split('.');
  for (var i = 0; i < 3; i++) {
    if (pkgVersionArr[i] > destVer[i]) {
      return true;
    } else if (pkgVersionArr[i] < destVer[i]) {
      return false;
    }
  }
  return false;
}

/**
 * Transitional option validator
 * @param {function|boolean?} validator
 * @param {string?} version
 * @param {string} message
 * @returns {function}
 */
validators.transitional = function transitional(validator, version, message) {
  var isDeprecated = version && isOlderVersion(version);

function formatMessage(opt, desc) {
    return '[Axios v' + pkg.version + '] Transitional option \'' + opt + '\'' + desc + (message ? '. ' + message : '');
  }

// eslint-disable-next-line func-names
  return function(value, opt, opts) {
    if (validator === false) {
      throw new Error(formatMessage(opt, ' has been removed in ' + version));
    }

if (isDeprecated && !deprecatedWarnings[opt]) {
      deprecatedWarnings[opt] = true;
      // eslint-disable-next-line no-console
      console.warn(
        formatMessage(
          opt,
          ' has been deprecated since v' + version + ' and will be removed in the near future'
        )
      );
    }

return validator ? validator(value, opt, opts) : true;
  };
};

/**
 * Assert object's properties type
 * @param {object} options
 * @param {object} schema
 * @param {boolean?} allowUnknown
 */

module.exports = {
  isOlderVersion: isOlderVersion,
  assertOptions: assertOptions,
  validators: validators
};

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