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var myVar = "Hello";
console.log(window.myVar); //"Hello"-全局變量成為window的屬性console.log(myVar === window.myVar); //true
function sayHi() {  console.log("Hi!");}
window.sayHi(); //"Hi!"-全局函數(shù)成為window的方法

const newWindow = window.open(  "https://www.example.com",  //URL  "exampleWindow",           //窗口名稱(chēng)  "width=600,height=400"     //窗口規(guī)格);

//關(guān)閉當(dāng)前窗口window.close();
//關(guān)閉由open()打開(kāi)的窗口newWindow.close();

//將窗口移動(dòng)到(100, 200)位置window.moveTo(100, 200);
//將窗口向右移動(dòng)50px,向下移動(dòng)30pxwindow.moveBy(50, 30);
//將窗口調(diào)整為800x600window.resizeTo(800, 600);
//將窗口寬度增加100px,高度減少50pxwindow.resizeBy(100, -50);

//判斷窗口是否已關(guān)閉if (newWindow.closed) {  console.log("新窗口已關(guān)閉");}
//使當(dāng)前窗口獲得焦點(diǎn)window.focus();
//使當(dāng)前窗口失去焦點(diǎn)window.blur();

var globalVar = "我是全局變量";
// 以下等價(jià)console.log(globalVar);        //"我是全局變量"console.log(window.globalVar); //"我是全局變量"

function globalFunc() {  console.log("我是全局函數(shù)");}
//以下等價(jià)globalFunc();        //"我是全局函數(shù)"window.globalFunc(); //"我是全局函數(shù)"

let localLet = "我是let變量";const localConst = "我是const常量";
console.log(window.localLet);   //undefinedconsole.log(window.localConst); //undefined

//進(jìn)入全屏function enterFullscreen() {  const element = document.documentElement;  if (element.requestFullscreen) {    element.requestFullscreen();  } else if (element.webkitRequestFullscreen) { /*Safari*/    element.webkitRequestFullscreen();  } else if (element.msRequestFullscreen) { /*IE11*/    element.msRequestFullscreen();  }}
//退出全屏function exitFullscreen() {  if (document.exitFullscreen) {    document.exitFullscreen();  } else if (document.webkitExitFullscreen) { /*Safari*/    document.webkitExitFullscreen();  } else if (document.msExitFullscreen) { /*IE11*/    document.msExitFullscreen();  }}

//監(jiān)聽(tīng)窗口大小變化window.addEventListener("resize", () => {  console.log(`窗口大小已改變：${window.innerWidth} x ${window.innerHeight}`);
  //響應(yīng)式設(shè)計(jì)常用技巧  if (window.innerWidth < 768) {    console.log("小屏幕布局");  } else {    console.log("大屏幕布局");  }});

//獲取當(dāng)前滾動(dòng)位置const scrollTop = window.pageYOffset || document.documentElement.scrollTop;
//滾動(dòng)到指定位置(平滑滾動(dòng))window.scrollTo({  top: 500,  behavior: "smooth"});
//滾動(dòng)到頁(yè)面頂部function scrollToTop() {  window.scrollTo({ top: 0, behavior: "smooth" });}
//滾動(dòng)到頁(yè)面底部function scrollToBottom() {  window.scrollTo({     top: document.body.scrollHeight,     behavior: "smooth"   });}