text: /*
   * The MIT License (MIT)
   *
   * Copyright (c) 2014 Broad Institute
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  
  const extend = function (parent, child) {
  
      child.prototype = Object.create(parent.prototype);
      child.prototype.constructor = child;
      child.prototype._super = Object.getPrototypeOf(child.prototype);
      return child;
  }
  
  /**
   * Test if the given value is a string or number.  Not using typeof as it fails on boxed primitives.
   *
   * @param value
   * @returns boolean
   */
  
  function isSimpleType(value) {
      const simpleTypes = new Set(["boolean", "number", "string", "symbol"]);
      const valueType = typeof value;
      return (value !== undefined && (simpleTypes.has(valueType) || value.substring || value.toFixed))
  }
  
  function buildOptions (config, options) {
  
      var defaultOptions = {
          oauthToken: config.oauthToken,
          headers: config.headers,
          withCredentials: config.withCredentials,
          filename: config.filename
      };
  
      return Object.assign(defaultOptions, options);
  }
  
  
  function download  (filename, data) {
  
      const element = document.createElement('a');
      element.setAttribute('href', data);
      element.setAttribute('download', filename);
      element.style.display = 'none';
      document.body.appendChild(element);
      element.click();
      document.body.removeChild(element);
  }
  
  
  /**
   * isMobile test from http://detectmobilebrowsers.com
   * TODO -- improve UI design so this isn't neccessary
   * @returns {boolean}
   */
  
  // igv.isMobile = function () {
  //
  //     const a = (navigator.userAgent || navigator.vendor || window.opera);
  //     return (/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a) ||
  //         /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0, 4)))
  //
  // }
  
  const doAutoscale = function (features) {
      var min, max;
  
      if (features.length > 0) {
          min = Number.MAX_VALUE;
          max = -Number.MAX_VALUE;
  
          features.forEach(function (f) {
              if (!Number.isNaN(f.value)) {
                  min = Math.min(min, f.value);
                  max = Math.max(max, f.value);
              }
          });
  
          // Insure we have a zero baseline
          if (max > 0) min = Math.min(0, min);
          if (max < 0) max = 0;
      } else {
          // No features -- default
          min = 0;
          max = 100;
      }
  
      return {min: min, max: max};
  }
  
  
  const validateLocusExtent = function (chromosomeLengthBP, extent, minimumBP) {
  
      let ss = extent.start;
      let ee = extent.end;
  
      if (undefined === ee) {
  
          ss -= minimumBP / 2;
          ee = ss + minimumBP;
  
          if (ee > chromosomeLengthBP) {
              ee = chromosomeLengthBP;
              ss = ee - minimumBP;
          } else if (ss < 0) {
              ss = 0;
              ee = minimumBP;
          }
  
      } else if (ee - ss < minimumBP) {
  
          const center = (ee + ss) / 2;
  
          if (center - minimumBP / 2 < 0) {
              ss = 0;
              ee = ss + minimumBP;
          } else if (center + minimumBP / 2 > chromosomeLengthBP) {
              ee = chromosomeLengthBP;
              ss = ee - minimumBP;
          } else {
              ss = center - minimumBP / 2;
              ee = ss + minimumBP;
          }
      }
  
      extent.start = Math.ceil(ss);
      extent.end = Math.floor(ee);
  };
  
  
  
  /*!
   * is-number <https://github.com/jonschlinkert/is-number>
   *
   * Copyright (c) 2014-present, Jon Schlinkert.
   * Released under the MIT License.
   */
  
  const isNumber = function(num) {
      if (typeof num === 'number') {
          return num - num === 0;
      }
      if (typeof num === 'string' && num.trim() !== '') {
          return Number.isFinite ? Number.isFinite(+num) : isFinite(+num);
      }
      return false;
  };
  
  export {extend, isSimpleType, buildOptions, download, validateLocusExtent, doAutoscale, isNumber}
  
  