檢測設備顯示特徵(Detecting the Device's Display Characteristics)

detectDevice.js

// 檢試是否為行動裝置
function isMobile() {
  if( /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)) {
    retrun true
  } else {
    return false
  }
}

detectOrientation.js

// 檢試裝置方向
// window.orientation 已棄用
// window.screen.orientation.type safari no support - https://developer.mozilla.org/zh-TW/docs/Web/API/Screen/orientation

function detectOrientation() {
  let query = window.matchMedia("(orientation:landscape)");
  let result = query.matches ? 'landscape' : 'portrait'
  return result
}