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                [toc] #### 1. 常用屬性 window對象是整個JavaScript腳本運行的頂層對象,它的常用屬性如下: ``` document:返回該窗口內裝載的HTML文檔 location:返回該窗口裝載的HTML文檔的URL navigator:返回瀏覽當前頁面的瀏覽器,包含了一系列的瀏覽器屬性,包括名稱,版本號和平臺等 screen:返回當前瀏覽者屏幕對象 history:返回該瀏覽窗口的歷史 ``` #### 2. 常用方法 ``` alert(), confirm(), prompt(): 彈出警告窗口,確認對話框,提示輸入對話框 close(), open(): 關閉窗口,打開一個新窗口,加載新的URL moveBy(), moveTo(): 移動窗口 //chrome FireFox不兼容 resizeBy(), resizeTo(): 重設窗口大小 //IE不兼容 scrollBy(), scrollTo(): 滾動當前窗口的HTML文檔 setInterval(), clearInterval(), setTimeout(): 設置,刪除定時器 ``` 1. window.confirm 彈出確認框 ``` var btn = document.getElementById("btn"); btn.onclick = function(){ var value = window.confirm("確定?"); if(value){ window.location.href = "https://www.taobao.com"; }else{ window.location.href = "https://www.baidu.com" } } ``` 2. window.prompt 彈出輸入框 ``` var value = window.prompt("輸入年齡"); if(value>22){ alert("可以結婚了!"); } ``` 3. window.open("https://www.baidu.com"); window.close(); 4. 定時器`setInterval`要點: 1. 進入事件之后清除定時器 2. 在定時器中,loop的代碼和到臨界值清除定時器的代碼,用if-else分割 ``` /*setInterval()實現打印數字后停止*/ var num = 0; var max = 3; var timer; timer = setInterval(function(){ if(num>max){ clearInterval(timer); }else { alert(num); num++; } }, 100) ``` 5. setTimeout()-->間隔一定時間執行函數,并且只執行一次 ``` var num = 0; var max = 3; var timer; function go(){ num++; alert(num); if(num>max){ clearTimeout(timer); }else { timer = setTimeout(go, 100); } } go(); ```
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