Ticket/InsdepUI/plugin/cropper-2.3.4/src/js/utilities.js

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  function isNumber(n) {
    return typeof n === 'number' && !isNaN(n);
  }

  function isUndefined(n) {
    return typeof n === 'undefined';
  }

  function toArray(obj, offset) {
    var args = [];

    // This is necessary for IE8
    if (isNumber(offset)) {
      args.push(offset);
    }

    return args.slice.apply(obj, args);
  }

  // Custom proxy to avoid jQuery's guid
  function proxy(fn, context) {
    var args = toArray(arguments, 2);

    return function () {
      return fn.apply(context, args.concat(toArray(arguments)));
    };
  }

  function isCrossOriginURL(url) {
    var parts = url.match(/^(https?:)\/\/([^\:\/\?#]+):?(\d*)/i);

    return parts && (
      parts[1] !== location.protocol ||
      parts[2] !== location.hostname ||
      parts[3] !== location.port
    );
  }

  function addTimestamp(url) {
    var timestamp = 'timestamp=' + (new Date()).getTime();

    return (url + (url.indexOf('?') === -1 ? '?' : '&') + timestamp);
  }

  function getCrossOrigin(crossOrigin) {
    return crossOrigin ? ' crossOrigin="' + crossOrigin + '"' : '';
  }

  function getImageSize(image, callback) {
    var newImage;

    // Modern browsers (ignore Safari, #120 & #509)
    if (image.naturalWidth && !IS_SAFARI_OR_UIWEBVIEW) {
      return callback(image.naturalWidth, image.naturalHeight);
    }

    // IE8: Don't use `new Image()` here (#319)
    newImage = document.createElement('img');

    newImage.onload = function () {