Javascript 方法大全
一、基礎知識??
1?創建腳本塊?
1:?<script?language=”JavaScript”>?
2:?JavaScript?code?goes?here?
3:?</script>??
??
2?隱藏腳本代碼?
1:?<script?language=”JavaScript”>?
2:?<!--?
3:?document.write(“Hello”);?
4:?//?-->?
5:?</script>??
在不支持JavaScript的瀏覽器中將不執行相關代碼?
3?瀏覽器不支持的時候顯示?
1:?<noscript>?
2:?Hello?to?the?non-JavaScript?browser.?
3:?</noscript>??
??
4?鏈接外部腳本文件?
1:?<script?language=”JavaScript”?src="/”filename.js"”></script>??
5?注釋腳本?
1:?//?This?is?a?comment?
2:?document.write(“Hello”);?//?This?is?a?comment?
3:?/*?
4:?All?of?this?
5:?is?a?comment?
6:?*/??
??
6?輸出到瀏覽器?
1:?document.write(“<strong>Hello</strong>”);??
??
7?定義變量?
1:?var?myVariable?=?“some?value”;??
??
8?字符串相加?
1:?var?myString?=?“String1”?+?“String2”;??
??
9?字符串搜索?
1:?<script?language=”JavaScript”>?
2:?<!--?
3:?var?myVariable?=?“Hello?there”;?
4:?var?therePlace?=?myVariable.search(“there”);?
5:?document.write(therePlace);?
6:?//?-->?
7:?</script>??
??
10?字符串替換?
1:?thisVar.replace(“Monday”,”Friday”);??
11?格式化字串?
1:?<script?language=”JavaScript”>?
2:?<!--?
3:?var?myVariable?=?“Hello?there”;?
4:?document.write(myVariable.big()?+?“<br>”);?
5:?document.write(myVariable.blink()?+?“<br>”);?
6:?document.write(myVariable.bold()?+?“<br>”);?
7:?document.write(myVariable.fixed()?+?“<br>”);?
8:?document.write(myVariable.fontcolor(“red”)?+?“<br>”);?
9:?document.write(myVariable.fontsize(“18pt”)?+?“<br>”);?
10:?document.write(myVariable.italics()?+?“<br>”);?
11:?document.write(myVariable.small()?+?“<br>”);?
12:?document.write(myVariable.strike()?+?“<br>”);?
13:?document.write(myVariable.sub()?+?“<br>”);?
14:?document.write(myVariable.sup()?+?“<br>”);?
15:?document.write(myVariable.toLowerCase()?+?“<br>”);?
16:?document.write(myVariable.toUpperCase()?+?“<br>”);?
17:??
18:?var?firstString?=?“My?String”;?
19:?var?finalString?=?firstString.bold().toLowerCase().fontcolor(“red”);?
20:?//?-->?
21:?</script>??
??
12?創建數組?
1:?<script?language=”JavaScript”>?
2:?<!--?
3:?var?myArray?=?new?Array(5);?
4:?myArray[0]?=?“First?Entry”;?
5:?myArray[1]?=?“Second?Entry”;?
6:?myArray[2]?=?“Third?Entry”;?
7:?myArray[3]?=?“Fourth?Entry”;?
8:?myArray[4]?=?“Fifth?Entry”;?
9:?var?anotherArray?=?new?Array(“First?Entry”,”Second?Entry”,”Third?Entry”,”Fourth?Entry”,”Fifth?Entry”);?
10:?//?-->?
11:?</script>??
??
13?數組排序?
1:?<script?language=”JavaScript”>?
2:?<!--?
3:?var?myArray?=?new?Array(5);?
4:?myArray[0]?=?“z”;?
5:?myArray[1]?=?“c”;?
6:?myArray[2]?=?“d”;?
7:?myArray[3]?=?“a”;?
8:?myArray[4]?=?“q”;?
9:?document.write(myArray.sort());?
10:?//?-->?
11:?</script>??
??
14?分割字符串?
1:?<script?language=”JavaScript”>?
2:?<!--?
3:?var?myVariable?=?“a,b,c,d”;?
4:?var?stringArray?=?myVariable.split(“,”);?
5:?document.write(stringArray[0]);?
6:?document.write(stringArray[1]);?
7:?document.write(stringArray[2]);?
8:?document.write(stringArray[3]);?
9:?//?-->?
10:?</script>??
??
15?彈出警告信息?
1:?<script?language=”JavaScript”>?
2:?<!--?
3:?window.alert(“Hello”);?
4:?//?-->?
5:?</script>??
??
16?彈出確認框?
1:?<script?language=”JavaScript”>?
2:?<!--?
3:?var?result?=?window.confirm(“Click?OK?to?continue”);?
4:?//?-->?
5:?</script>??
??
17?定義函數?
1:?<script?language=”JavaScript”>?
2:?<!--?
3:?function?multiple(number1,number2)?{??
4:?var?result?=?number1?*?number2;?
5:?return?result;?
6:?}?
7:?//?-->?
8:?</script>??
??
18?調用JS函數?
1:?<a?href=”#”?onClick=”functionName()”>Link?text</a>?
2:?<a?href="/”javascript:functionName"()”>Link?text</a>??
??
19?在頁面加載完成后執行函數?
1:?<body?onLoad=”functionName();”>?
2:?Body?of?the?page?
3:?</body>??
20?條件判斷?
1:?<script>?
2:?<!--?
3:?var?userChoice?=?window.confirm(“Choose?OK?or?Cancel”);?
4:?var?result?=?(userChoice?==?true)???“OK”?:?“Cancel”;?
5:?document.write(result);?
6:?//?-->?
7:?</script>??
??
21?指定次數循環?
1:?<script>?
2:?<!--?
3:?var?myArray?=?new?Array(3);?
4:?myArray[0]?=?“Item?0”;?
5:?myArray[1]?=?“Item?1”;?
6:?myArray[2]?=?“Item?2”;?
7:?for?(i?=?0;?i?<?myArray.length;?i++)?{??
8:?document.write(myArray[i]?+?“<br>”);?
9:?}?
10:?//?-->?
11:?</script>??
??
22?設定將來執行?
1:?<script>?
2:?<!--?
3:?function?hello()?{??
4:?window.alert(“Hello”);?
5:?}?
6:?window.setTimeout(“hello()”,5000);?
7:?//?-->?
8:?</script>??
??
23?定時執行函數?
1:?<script>?
2:?<!--?
3:?function?hello()?{??
4:?window.alert(“Hello”);?
5:?window.setTimeout(“hello()”,5000);?
6:?}?
7:?window.setTimeout(“hello()”,5000);?
8:?//?-->?
9:?</script>??
??
24?取消定時執行?
1:?<script>?
2:?<!--?
3:?function?hello()?{??
4:?window.alert(“Hello”);?
5:?}?
6:?var?myTimeout?=?window.setTimeout(“hello()”,5000);?
7:?window.clearTimeout(myTimeout);?
8:?//?-->?
9:?</script>??
??
25?在頁面卸載時候執行函數?
1:?<body?onUnload=”functionName();”>?
2:?Body?of?the?page?
3:?</body>??
JavaScript就這么回事2：瀏覽器輸出??
26?訪問document對象?
1:?<script?language=”JavaScript”>?
2:?var?myURL?=?document.URL;?
3:?window.alert(myURL);?
4:?</script>??
??
27?動態輸出HTML?
1:?<script?language=”JavaScript”>?
2:?document.write(“<p>Here’s?some?information?about?this?document:</p>”);?
3:?document.write(“<ul>”);?
4:?document.write(“<li>Referring?Document:?“?+?document.referrer?+?“</li>”);?
5:?document.write(“<li>Domain:?“?+?document.domain?+?“</li>”);?
6:?document.write(“<li>URL:?“?+?document.URL?+?“</li>”);?
7:?document.write(“</ul>”);?
8:?</script>??
28?輸出換行?
1:?document.writeln(“<strong>a</strong>”);?
2:?document.writeln(“b”);??
??
29?輸出日期?
1:?<script?language=”JavaScript”>?
2:?var?thisDate?=?new?Date();?
3:?document.write(thisDate.toString());?
4:?</script>??
??
30?指定日期的時區?
1:?<script?language=”JavaScript”>?
2:?var?myOffset?=?-2;?
3:?var?currentDate?=?new?Date();?
4:?var?userOffset?=?currentDate.getTimezoneOffset()/60;?
5:?var?timeZoneDifference?=?userOffset?-?myOffset;?
6:?currentDate.setHours(currentDate.getHours()?+?timeZoneDifference);?
7:?document.write(“The?time?and?date?in?Central?Europe?is:?“?+?currentDate.toLocaleString());?
8:?</script>??
31?設置日期輸出格式?
1:?<script?language=”JavaScript”>?
2:?var?thisDate?=?new?Date();?
3:?var?thisTimeString?=?thisDate.getHours()?+?“:”?+?thisDate.getMinutes();?
4:?var?thisDateString?=?thisDate.getFullYear()?+?“/”?+?thisDate.getMonth()?+?“/”?+?thisDate.getDate();?
5:?document.write(thisTimeString?+?“?on?“?+?thisDateString);?
6:?</script>??
32?讀取URL參數?
1:?<script?language=”JavaScript”>?
2:?var?urlParts?=?document.URL.split(“?”);?
3:?var?parameterParts?=?urlParts[1].split(“&”);?
4:?for?(i?=?0;?i?<?parameterParts.length;?i++)?{??
5:?var?pairParts?=?parameterParts[i].split(“=”);?
6:?var?pairName?=?pairParts[0];?
7:?var?pairValue?=?pairParts[1];?
8:?document.write(pairName?+?“?：“?+pairValue?);?
9:?}?
10:?</script>??
你還以為HTML是無狀態的么？?
33?打開一個新的document對象?
1:?<script?language=”JavaScript”>?
2:?function?newDocument()?{??
3:?document.open();?
4:?document.write(“<p>This?is?a?New?Document.</p>”);?
5:?document.close();?
6:?}?
7:?</script>??
??
34?頁面跳轉?
1:?<script?language=”JavaScript”>?
2:?window.location?=?“http://www.liu21st.com/”;?
3:?</script>??
??
35?添加網頁加載進度窗口?
1:?<html>?
2:?<head>?
3:?<script?language=’javaScript’>?
4:?var?placeHolder?=?window.open(’holder.html’,’placeholder’,’width=200,height=200’);?
5:?</script>?
6:?<title>The?Main?Page</title>?
7:?</head>?
8:?<body?onLoad=’placeHolder.close()’>?
9:?<p>This?is?the?main?page</p>?
10:?</body>?
11:?</html>??
??
三、圖像??
??
36?讀取圖像屬性?
1:?<img?src="http://www.knowsky.com/”image1.jpg"”?name=”myImage”>?
2:?<a?href=”#?”?onClick=”window.alert(document.myImage.width)”>Width</a>?
3:??
37?動態加載圖像?
1:?<script?language=”JavaScript”>?
2:?myImage?=?new?Image;?
3:?myImage.src?=?“Tellers1.jpg”;?
4:?</script>??
38?簡單的圖像替換?
1:?<script?language=”JavaScript”>?
2:?rollImage?=?new?Image;?
3:?rollImage.src?=?“rollImage1.jpg”;?
4:?defaultImage?=?new?Image;?
5:?defaultImage.src?=?“image1.jpg”;?
6:?</script>?
7:?<a?href="/”myUrl"”?onMouseOver=”document.myImage.src?=?rollImage.src;”?
8:?onMouseOut=”document.myImage.src?=?defaultImage.src;”>?
9:?<img?src="http://www.knowsky.com/”image1.jpg"”?name=”myImage”?width=100?height=100?border=0>??
39?隨機顯示圖像?
1:?<script?language=”JavaScript”>?
2:?var?imageList?=?new?Array;?
3:?imageList[0]?=?“image1.jpg”;?
4:?imageList[1]?=?“image2.jpg”;?
5:?imageList[2]?=?“image3.jpg”;?
6:?imageList[3]?=?“image4.jpg”;?
7:?var?imageChoice?=?Math.floor(Math.random()?*?imageList.length);?
8:?document.write(‘<img?src=”’?+?imageList[imageChoice]?+?‘“>’);?
9:?</script>??
40?函數實現的圖像替換?
1:?<script?language=”JavaScript”>?
2:?var?source?=?0;?
3:?var?replacement?=?1;?
4:?function?createRollOver(originalImage,replacementImage)?{??
5:?var?imageArray?=?new?Array;?
6:?imageArray[source]?=?new?Image;?
7:?imageArray[source].src?=?originalImage;?
8:?imageArray[replacement]?=?new?Image;?
9:?imageArray[replacement].src?=?replacementImage;?
10:?return?imageArray;?
11:?}?
12:?var?rollImage1?=?createRollOver(“image1.jpg”,”rollImage1.jpg”);?
13:?</script>?
14:?<a?href=”#”?onMouseOver=”document.myImage1.src?=?rollImage1[replacement].src;”?
15:?onMouseOut=”document.myImage1.src?=?rollImage1[source].src;”>?
16:?<img?src="http://www.knowsky.com/”image1.jpg"”?width=100?name=”myImage1”?border=0>?
17:?</a>??
41?創建幻燈片?
1:?<script?language=”JavaScript”>?
2:?var?imageList?=?new?Array;?
3:?imageList[0]?=?new?Image;?
4:?imageList[0].src?=?“image1.jpg”;?
5:?imageList[1]?=?new?Image;?
6:?imageList[1].src?=?“image2.jpg”;?
7:?imageList[2]?=?new?Image;?
8:?imageList[2].src?=?“image3.jpg”;?
9:?imageList[3]?=?new?Image;?
10:?imageList[3].src?=?“image4.jpg”;?
11:?function?slideShow(imageNumber)?{??
12:?document.slideShow.src?=?imageList[imageNumber].src;?
13:?imageNumber?+=?1;?
14:?if?(imageNumber?<?imageList.length)?{??
15:?window.setTimeout(“slideShow(“?+?imageNumber?+?“)”,3000);?
16:?}?
17:?}?
18:?</script>?
19:?</head>?
20:?<body?onLoad=”slideShow(0)”>?
21:?<img?src="http://www.knowsky.com/”image1.jpg"”?width=100?name=”slideShow”>??
42?隨機廣告圖片?
1:?<script?language=”JavaScript”>?
2:?var?imageList?=?new?Array;?
3:?imageList[0]?=?“image1.jpg”;?
4:?imageList[1]?=?“image2.jpg”;?
5:?imageList[2]?=?“image3.jpg”;?
6:?imageList[3]?=?“image4.jpg”;?
7:?var?urlList?=?new?Array;?
8:?urlList[0]?=?“http://some.host/”;?
9:?urlList[1]?=?“http://another.host/”;?
10:?urlList[2]?=?“http://somewhere.else/”;?
11:?urlList[3]?=?“http://right.here/”;?
12:?var?imageChoice?=?Math.floor(Math.random()?*?imageList.length);?
13:?document.write(‘<a?href=”’?+?urlList[imageChoice]?+?‘“><img?src=”’?+?imageList[imageChoice]?+?‘“></a>’);?
14:?</script>??
四、表單??
還是先繼續寫完JS就這么回事系列吧～?
43?表單構成?
1:?<form?method=”post”?action=”target.html”?name=”thisForm”>?
2:?<input?type=”text”?name=”myText”>?
3:?<select?name=”mySelect”>?
4:?<option?value=”1”>First?Choice</option>?
5:?<option?value=”2”>Second?Choice</option>?
6:?</select>?
7:?<br>?
8:?<input?type=”submit”?value=”Submit?Me”>?
9:?</form>??
44?訪問表單中的文本框內容?
1:?<form?name=”myForm”>?
2:?<input?type=”text”?name=”myText”>?
3:?</form>?
4:?<a?href=’#’?onClick=’window.alert(document.myForm.myText.value);’>Check?Text?Field</a>??
45?動態復制文本框內容?
1:?<form?name=”myForm”>?
2:?Enter?some?Text:?<input?type=”text”?name=”myText”><br>?
3:?Copy?Text:?<input?type=”text”?name=”copyText”>?
4:?</form>?
5:?<a?href=”#”?onClick=”document.myForm.copyText.value?=?
6:?document.myForm.myText.value;”>Copy?Text?Field</a>??
46?偵測文本框的變化?
1:?<form?name=”myForm”>?
2:?Enter?some?Text:?<input?type=”text”?name=”myText”?onChange=”alert(this.value);”>?
3:?</form>??
47?訪問選中的Select?
1:?<form?name=”myForm”>?
2:?<select?name=”mySelect”>?
3:?<option?value=”First?Choice”>1</option>?
4:?<option?value=”Second?Choice”>2</option>?
5:?<option?value=”Third?Choice”>3</option>?
6:?</select>?
7:?</form>?
8:?<a?href=’#’?onClick=’alert(document.myForm.mySelect.value);’>Check?Selection?List</a>??
48?動態增加Select項?
1:?<form?name=”myForm”>?
2:?<select?name=”mySelect”>?
3:?<option?value=”First?Choice”>1</option>?
4:?<option?value=”Second?Choice”>2</option>?
5:?</select>?
6:?</form>?
7:?<script?language=”JavaScript”>?
8:?document.myForm.mySelect.length++;?
9:?document.myForm.mySelect.options[document.myForm.mySelect.length?-?1].text?=?“3”;?
10:?document.myForm.mySelect.options[document.myForm.mySelect.length?-?1].value?=?“Third?Choice”;?
11:?</script>??
49?驗證表單字段?
1:?<script?language=”JavaScript”>?
2:?function?checkField(field)?{??
3:?if?(field.value?==?“”)?{??
4:?window.alert(“You?must?enter?a?value?in?the?field”);?
5:?field.focus();?
6:?}?
7:?}?
8:?</script>?
9:?<form?name=”myForm”?action=”target.html”>?
10:?Text?Field:?<input?type=”text”?name=”myField”onBlur=”checkField(this)”>?
11:?<br><input?type=”submit”>?
12:?</form>??
50?驗證Select項?
1:?function?checkList(selection)?{??
2:?if?(selection.length?==?0)?{??
3:?window.alert(“You?must?make?a?selection?from?the?list.”);?
4:?return?false;?
5:?}?
6:?return?true;?
7:?}??
51?動態改變表單的action?
1:?<form?name=”myForm”?action=”login.html”>?
2:?Username:?<input?type=”text”?name=”username”><br>?
3:?PassWord:?<input?type=”password”?name=”password”><br>?
4:?<input?type=”button”?value=”Login”?onClick=”this.form.submit();”>?
5:?<input?type=”button”?value=”Register”?onClick=”this.form.action?=?‘register.html’;?this.form.submit();”>?
6:?<input?type=”button”?value=”Retrieve?Password”?onClick=”this.form.action?=?‘password.html’;?this.form.submit();”>?
7:?</form>??
52?使用圖像按鈕?
1:?<form?name=”myForm”?action=”login.html”>?
2:?Username:?<input?type=”text”?name=”username”><br>?
3:?Password:?<input?type=”password”name=”password”><br>?
4:?<input?type=”image”?src="http://www.knowsky.com/”login.gif"”?value=”Login”>?
5:?</form>?
6:??
53?表單數據的加密?
1:?<SCRIPT?LANGUAGE=’JavaScript’>?
2:?<!--?
3:?function?encrypt(item)?{??
4:?var?newItem?=?’’;?
5:?for?(i=0;?i?<?item.length;?i++)?{??
6:?newItem?+=?item.charCodeAt(i)?+?’.’;?
7:?}?
8:?return?newItem;?
9:?}?
10:?function?encryptForm(myForm)?{??
11:?for?(i=0;?i?<?myForm.elements.length;?i++)?{??
12:?myForm.elements[i].value?=?encrypt(myForm.elements[i].value);?
13:?}?
14:?}?
15:??
16:?//-->?
17:?</SCRIPT>?
18:?<form?name=’myForm’?onSubmit=’encryptForm(this);?window.alert(this.myField.value);’>?
19:?Enter?Some?Text:?<input?type=text?name=myField><input?type=submit>?
20:?</form>??
??
五、窗口和框架??
54?改變瀏覽器狀態欄文字提示?
1:?<script?language=”JavaScript”>?
2:?window.status?=?“A?new?status?message”;?
3:?</script>??
55?彈出確認提示框?
1:?<script?language=”JavaScript”>?
2:?var?userChoice?=?window.confirm(“Click?OK?or?Cancel”);?
3:?if?(userChoice)?{??
4:?document.write(“You?chose?OK”);?
5:?}?else?{??
6:?document.write(“You?chose?Cancel”);?
7:?}?
8:?</script>??
56?提示輸入?
1:?<script?language=”JavaScript”>?
2:?var?userName?=?window.prompt(“Please?Enter?Your?Name”,”Enter?Your?Name?Here”);?
3:?document.write(“Your?Name?is?“?+?userName);?
4:?</script>??
57?打開一個新窗口?
1:?//打開一個名稱為myNewWindow的瀏覽器新窗口?
2:?<script?language=”JavaScript”>?
3:?window.open(“http://www.liu21st.com/”,”myNewWindow”);?
4:?</script>??
58?設置新窗口的大小?
1:?<script?language=”JavaScript”>?
2:?window.open(“http://www.liu21st.com/”,”myNewWindow”,’height=300,width=300’);?
3:?</script>??
59?設置新窗口的位置?
1:?<script?language=”JavaScript”>?
2:?window.open(“http://www.liu21st.com/”,”myNewWindow”,’height=300,width=300,left=200,screenX=200,top=100,screenY=100’);
3:?</script>??
60?是否顯示工具欄和滾動欄?
1:?<script?language=”JavaScript”>?
2:?window.open(“http:??
61?是否可以縮放新窗口的大小?
1:?<script?language=”JavaScript”>?
2:?window.open(’http://www.liu21st.com/’?,?’myNewWindow’,?’resizable=yes’?);</script>??
62?加載一個新的文檔到當前窗口?
1:?<a?href=’#’?onClick=’document.location?=?’125a.html’;’?>Open?New?Document</a>??
63?設置頁面的滾動位置?
1:?<script?language=”JavaScript”>?
2:?if?(document.all)?{?//如果是IE瀏覽器則使用scrollTop屬性?
3:?document.body.scrollTop?=?200;?
4:?}?else?{?//如果是NetScape瀏覽器則使用pageYOffset屬性?
5:?window.pageYOffset?=?200;?
6:?}</script>??
64?在IE中打開全屏窗口?
1:?<a?href=’#’?onClick=”window.open(’http://www.juxta.com/’,’newWindow’,’fullScreen=yes’);”>Open?a?full-screen?window</a>??
65?新窗口和父窗口的操作?
1:?<script?language=”JavaScript”>?
2:?//定義新窗口?
3:?var?newWindow?=?window.open(“128a.html”,”newWindow”);?
4:?newWindow.close();?//在父窗口中關閉打開的新窗口?
5:?</script>?
6:?在新窗口中關閉父窗口?
7:?window.opener.close()??
66?往新窗口中寫內容?
1:?<script?language=”JavaScript”>?
2:?var?newWindow?=?window.open(“”,”newWindow”);?
3:?newWindow.document.open();?
4:?newWindow.document.write(“This?is?a?new?window”);?
5:?newWIndow.document.close();?
6:?</script>??
67?加載頁面到框架頁面?
1:?<frameset?cols=”50%,*”>?
2:?<frame?name=”frame1”?src="/”135a.html"”>?
3:?<frame?name=”frame2”?src="/”about:blank"”>?
4:?</frameset>?
5:?在frame1中加載frame2中的頁面?
6:?parent.frame2.document.location?=?“135b.html”;??
??
68?在框架頁面之間共享腳本?
如果在frame1中html文件中有個腳本?
1:?function?doAlert()?{??
2:?window.alert(“Frame?1?is?loaded”);?
3:?}??
那么在frame2中可以如此調用該方法?
1:?<body?onLoad=”parent.frame1.doAlert();”>?
2:?This?is?frame?2.?
3:?</body>??
69?數據公用?
可以在框架頁面定義數據項，使得該數據可以被多個框架中的頁面公用?
1:?<script?language=”JavaScript”>?
2:?var?persistentVariable?=?“This?is?a?persistent?value”;?
3:?</script>?
4:?<frameset?cols=”50%,*”>?
5:?<frame?name=”frame1”?src="/”138a.html"”>?
6:?<frame?name=”frame2”?src="/”138b.html"”>?
7:?</frameset>??
這樣在frame1和frame2中都可以使用變量persistentVariable??
70?框架代碼庫?
根據以上的一些思路，我們可以使用一個隱藏的框架頁面來作為整個框架集的代碼庫?
1:?<frameset?cols=”0,50%,*”>?
2:?<frame?name=”codeFrame”?src="/”140code.html"”>?
3:?<frame?name=”frame1”?src="/”140a.html"”>?
4:?<frame?name=”frame2”?src="/”140b.html"”>?
5:?</frameset>??
轉載于:https://www.cnblogs.com/ranran/p/4062841.html
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