JavaScript就这么回事.docx
- 文档编号:11297855
- 上传时间:2023-02-26
- 格式:DOCX
- 页数:22
- 大小:21.01KB
JavaScript就这么回事.docx
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JavaScript就这么回事
适合阅读范围:
对JavaScript一无所知~离精通只差一步之遥的人
基础知识:
HTML
1:
基础知识
1创建脚本块
1:
2:
JavaScriptcodegoeshere
3:
2隐藏脚本代码
1:
2:
--
3:
document.write(“Hello”);
4:
//-->
5:
在不支持JavaScript的浏览器中将不执行相关代码
3浏览器不支持的时候显示
1:
2:
Hellotothenon-JavaScriptbrowser.
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4链接外部脚本文件
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5注释脚本
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//Thisisacomment
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document.write(“Hello”);//Thisisacomment
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/*
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Allofthis
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isacomment
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*/
6输出到浏览器
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document.write(“Hello”);
7定义变量
1:
varmyVariable=“somevalue”;
8字符串相加
1:
varmyString=“String1”+“String2”;
9字符串搜索
1:
2:
--
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varmyVariable=“Hellothere”;
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vartherePlace=myVariable.search(“there”);
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document.write(therePlace);
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//-->
7:
10字符串替换
1:
thisVar.replace(“Monday”,”Friday”);
11格式化字串
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2:
--
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varmyVariable=“Hellothere”;
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document.write(myVariable.big()+“
”);
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document.write(myVariable.blink()+“
”);
6:
document.write(myVariable.bold()+“
”);
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document.write(myVariable.fixed()+“
”);
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document.write(myVariable.fontcolor(“red”)+“
”);
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document.write(myVariable.fontsize(“18pt”)+“
”);
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document.write(myVariable.italics()+“
”);
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document.write(myVariable.small()+“
”);
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document.write(myVariable.strike()+“
”);
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document.write(myVariable.sub()+“
”);
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document.write(myVariable.sup()+“
”);
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document.write(myVariable.toLowerCase()+“
”);
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document.write(myVariable.toUpperCase()+“
”);
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varfirstString=“MyString”;
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varfinalString=firstString.bold().toLowerCase().fontcolor(“red”);
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//-->
21:
12创建数组
1:
2:
--
3:
varmyArray=newArray(5);
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myArray[0]=“FirstEntry”;
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myArray[1]=“SecondEntry”;
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myArray[2]=“ThirdEntry”;
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myArray[3]=“FourthEntry”;
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myArray[4]=“FifthEntry”;
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varanotherArray=newArray(“FirstEntry”,”SecondEntry”,”ThirdEntry”,”FourthEntry”,”FifthEntry”);
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//-->
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13数组排序
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2:
--
3:
varmyArray=newArray(5);
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myArray[0]=“z”;
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myArray[1]=“c”;
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myArray[2]=“d”;
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myArray[3]=“a”;
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myArray[4]=“q”;
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document.write(myArray.sort());
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//-->
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14分割字符串
1:
2:
--
3:
varmyVariable=“a,b,c,d”;
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varstringArray=myVariable.split(“,”);
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document.write(stringArray[0]);
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document.write(stringArray[1]);
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document.write(stringArray[2]);
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document.write(stringArray[3]);
9:
//-->
10:
15弹出警告信息
1:
2:
--
3:
window.alert(“Hello”);
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//-->
5:
16弹出确认框
1:
2:
--
3:
varresult=window.confirm(“ClickOKtocontinue”);
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//-->
5:
17定义函数
1:
2:
--
3:
functionmultiple(number1,number2){
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varresult=number1*number2;
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returnresult;
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}
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//-->
8:
18调用JS函数
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2:
functionName"()”>Linktext 19在页面加载完成后执行函数 1: 2: Bodyofthepage 3: