react-router/modules/DOMUtils.js

A complete routing library for React.js

export var canUseDOM = !!(
  (typeof window !== 'undefined' &&
  window.document && window.document.createElement)
);

export function getHashPath() {
  return decodeURI(
    // We can't use window.location.hash here because it's not
    // consistent across browsers - Firefox will pre-decode it!
    window.location.href.split('#')[1] || ''
  );
}

export function replaceHashPath(path) {
  window.location.replace(
    window.location.pathname + window.location.search + '#' + path
  );
}

export function getWindowPath() {
  return decodeURI(
    window.location.pathname + window.location.search
  );
}

export function getWindowScrollPosition() {
  return {
    scrollX: window.pageXOffset || document.documentElement.scrollLeft,
    scrollY: window.pageYOffset || document.documentElement.scrollTop
  };
}

export function setWindowScrollPosition(scrollX, scrollY) {
  window.scrollTo(scrollX, scrollY);
}

/**
 * taken from modernizr
 * https://github.com/Modernizr/Modernizr/blob/master/LICENSE
 * https://github.com/Modernizr/Modernizr/blob/master/feature-detects/history.js
 * changed to avoid false negatives for Windows Phones: https://github.com/rackt/react-router/issues/586
 */
export function supportsHistory() {
  var ua = navigator.userAgent;
  if ((ua.indexOf('Android 2.') !== -1 || ua.indexOf('Android 4.0') !== -1) && ua.indexOf('Mobile Safari') !== -1 && ua.indexOf('Chrome') === -1 && ua.indexOf('Windows Phone') === -1) {
    return false;
  }
  return window.history && 'pushState' in window.history;
}