react-select/lib/internal/ScrollLock/utils.js

A Select control built with and for ReactJS

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.preventTouchMove = preventTouchMove;
exports.allowTouchMove = allowTouchMove;
exports.preventInertiaScroll = preventInertiaScroll;
exports.isTouchDevice = isTouchDevice;
function preventTouchMove(e) {
  e.preventDefault();
}

function allowTouchMove(e) {
  e.stopPropagation();
}

function preventInertiaScroll() {
  var top = this.scrollTop;
  var totalScroll = this.scrollHeight;
  var currentScroll = top + this.offsetHeight;

  if (top === 0) {
    this.scrollTop = 1;
  } else if (currentScroll === totalScroll) {
    this.scrollTop = top - 1;
  }
}

// `ontouchstart` check works on most browsers
// `maxTouchPoints` works on IE10/11 and Surface
function isTouchDevice() {
  return 'ontouchstart' in window || navigator.maxTouchPoints;
}