文章 专题 AI工具 学习 下载 问答 源码 最近更新
PHP
会员中心 讲师中心 微信公众号
首页 > web前端 > js教程 > 正文

国外的为初学者写的JavaScript教程_基础知识

php中文网
发布： 2016-05-16 19:03:54
原创
2246人浏览过

write and writeln1

write and writeln2

write and writeln3

write and writeln4

write and writeln5

write and writeln6

write and writeln7

write and writeln8

write and writeln9

Document object0 

Document object1  国外的为初学者写的JavaScript教程_基础知识国外的为初学者写的JavaScript教程_基础知识
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>title</SPAN><SPAN class=code-keyword>></SPAN>This is a JavaScript example<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>title</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>script</SPAN> <SPAN class=code-attribute>language</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>JavaScript"</SPAN><SPAN class=code-keyword>></SPAN> 
<!-- 
document.write(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Hello World!"</SPAN>); 
<SPAN class=code-comment>//</SPAN><SPAN class=code-comment>--> 
</SPAN> 
<SPAN class=code-keyword></</SPAN><SPAN class=code-leadattribute>script</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN> Hi, man! <SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>script</SPAN><SPAN class=code-keyword>></SPAN> 
.....// The code embedded <SPAN class=code-keyword>in</SPAN> the <body> tags. 
<SPAN class=code-keyword></</SPAN><SPAN class=code-leadattribute>script</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>script language=<SPAN class=code-string>"</SPAN><SPAN class=code-string>JavaScript1.2"</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>script language=<SPAN class=code-string>"</SPAN><SPAN class=code-string>JavaScript"</SPAN> src=<SPAN class=code-string>"</SPAN><SPAN class=code-string>hello.js"</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>/script<SPAN class=code-keyword>></SPAN>
登录后复制
document.write(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Hello World!"</SPAN>)
登录后复制
<SPAN class=code-keyword><</SPAN>HTML<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>HEAD<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>TITLE<SPAN class=code-keyword>></SPAN> Welcome to my site<SPAN class=code-keyword><</SPAN>/TITLE<SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>/HEAD<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>BODY<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>SCRIPT LANGUAGE=<SPAN class=code-string>"</SPAN><SPAN class=code-string>JAVASCRIPT"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>!-- 
document.write(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Welcome to my site!"</SPAN>); 
<SPAN class=code-comment>//</SPAN><SPAN class=code-comment> --> 
</SPAN> 
<SPAN class=code-keyword><</SPAN>/SCRIPT<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/BODY<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/HTML<SPAN class=code-keyword>></SPAN>
登录后复制
document.write(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Hi there."</SPAN>)
登录后复制
 
<SPAN class=code-keyword><</SPAN>script language=<SPAN class=code-string>"</SPAN><SPAN class=code-string>JavaScript"</SPAN><SPAN class=code-keyword>></SPAN> 
document.write(<SPAN class=code-string>"</SPAN><SPAN class=code-string>This page created by John N. Last update:"</SPAN> + document.lastModified); 
<SPAN class=code-keyword><</SPAN>/script<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>script<SPAN class=code-keyword>></SPAN> 
document.bgColor=<SPAN class=code-string>"</SPAN><SPAN class=code-string>black"</SPAN> 
document.fgColor=<SPAN class=code-string>"</SPAN><SPAN class=code-string>#336699"</SPAN> 
<SPAN class=code-keyword><</SPAN>/script<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>body<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>script<SPAN class=code-keyword>></SPAN> 
window.alert(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Welcome to my site!"</SPAN>) 
<SPAN class=code-keyword><</SPAN>/script<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/body<SPAN class=code-keyword>></SPAN>
登录后复制
 
window.confirm(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Are you sure you want to quit?"</SPAN>)
登录后复制
 
window.prompt(<SPAN class=code-string>"</SPAN><SPAN class=code-string>please enter user name"</SPAN>)
登录后复制
alert() 
confirm() 
prompt()
登录后复制
<SPAN class=code-keyword><</SPAN>script<SPAN class=code-keyword>></SPAN> 
var x=window.confirm(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Are you sure you want to quit"</SPAN>) 

<SPAN class=code-keyword>if</SPAN> (x) 
  window.alert(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Thank you."</SPAN>) 
<SPAN class=code-keyword>else</SPAN> 
  window.alert(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Good choice."</SPAN>) 
<SPAN class=code-keyword><</SPAN>/script<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>script<SPAN class=code-keyword>></SPAN> 
var y=window.prompt(<SPAN class=code-string>"</SPAN><SPAN class=code-string>please enter your name"</SPAN>) 
window.alert(y) 
<SPAN class=code-keyword><</SPAN>/script<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>script</SPAN><SPAN class=code-keyword>></SPAN> 
var x=confirm(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Are you sure you want to quit?"</SPAN>) 
<SPAN class=code-keyword>if</SPAN> (!x) 
  window.location=<SPAN class=code-string>"</SPAN><SPAN class=code-string>http://www.yahoo.com"</SPAN> 
<SPAN class=code-keyword></</SPAN><SPAN class=code-leadattribute>script</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN> 
Welcome to my website!. 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制
function test() 
{ 
  document.write(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Hello can you see me?"</SPAN>) 
}
登录后复制
function test() 
{ 
  document.write(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Hello can you see me?"</SPAN>) 
} 
test()
登录后复制
<SPAN class=code-keyword><</SPAN>script<SPAN class=code-keyword>></SPAN> 
function ss() 
{ 
alert(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Thank you!"</SPAN>) 
} 
<SPAN class=code-keyword><</SPAN>/script<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>form<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>button"</SPAN> value=<SPAN class=code-string>"</SPAN><SPAN class=code-string>Click here"</SPAN> onclick=<SPAN class=code-string>"</SPAN><SPAN class=code-string>ss()"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/form<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>body onload=<SPAN class=code-string>"</SPAN><SPAN class=code-string>ss()"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>frameset onload=<SPAN class=code-string>"</SPAN><SPAN class=code-string>ss()"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>img src=<SPAN class=code-string>"</SPAN><SPAN class=code-string>whatever.gif"</SPAN> onload=<SPAN class=code-string>"</SPAN><SPAN class=code-string>ss()"</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>a href=<SPAN class=code-string>"</SPAN><SPAN class=code-string>#"</SPAN> onMouseOver=<SPAN class=code-string>"</SPAN><SPAN class=code-string>document.write('Hi, nice to see you!"</SPAN><SPAN class=code-keyword>></SPAN>Over Here!<SPAN class=code-keyword><</SPAN>/a<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>a href=<SPAN class=code-string>"</SPAN><SPAN class=code-string>#"</SPAN> onMouseOut=<SPAN class=code-string>"</SPAN><SPAN class=code-string>alert('Good try!')"</SPAN><SPAN class=code-keyword>></SPAN>Get Out Here!<SPAN class=code-keyword><</SPAN>/a<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>body onunload=<SPAN class=code-string>"</SPAN><SPAN class=code-string>alert('Thank you for visiting us. See you soon')"</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>form<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>button"</SPAN> value=<SPAN class=code-string>"</SPAN><SPAN class=code-string>Click here!"</SPAN> onClick=<SPAN class=code-string>"</SPAN><SPAN class=code-string>alert('Thanks 
for visiting my site!');window.location='http://www.yahoo.com'"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/form<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>form name=<SPAN class=code-string>"</SPAN><SPAN class=code-string>aa"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>text"</SPAN> size=<SPAN class=code-string>"</SPAN><SPAN class=code-string>10"</SPAN> value=<SPAN class=code-string>"</SPAN><SPAN class=code-string>"</SPAN> name=<SPAN class=code-string>"</SPAN><SPAN class=code-string>bb"</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>br<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>button"</SPAN> 
value=<SPAN class=code-string>"</SPAN><SPAN class=code-string>Click Here"</SPAN>onclick=<SPAN class=code-string>"</SPAN><SPAN class=code-string>alert(document.aa.bb.value)"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/form<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>script</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword>function</SPAN> emailchk() 
{ 
var x=document.feedback.email.value 
<SPAN class=code-keyword>if</SPAN> (x.indexOf(<SPAN class=code-string>"</SPAN><SPAN class=code-string>@"</SPAN>)==-1) 
{ 
  alert(<SPAN class=code-string>"</SPAN><SPAN class=code-string>It seems you entered an invalid email address."</SPAN>) 
  document.feedback.email.focus() 
} 
} 
<SPAN class=code-keyword></</SPAN><SPAN class=code-leadattribute>script</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>form 
name=<SPAN class=code-string>"</SPAN><SPAN class=code-string>feedback"</SPAN><SPAN class=code-keyword>></SPAN> 
Email:<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>text"</SPAN> size=<SPAN class=code-string>"</SPAN><SPAN class=code-string>20"</SPAN> name=<SPAN class=code-string>"</SPAN><SPAN class=code-string>email"</SPAN> 
onblur=<SPAN class=code-string>"</SPAN><SPAN class=code-string>emailchk()"</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>br<SPAN class=code-keyword>></SPAN> 
Comment: <SPAN class=code-keyword><</SPAN>textarea name=<SPAN class=code-string>"</SPAN><SPAN class=code-string>comment"</SPAN> rows=<SPAN class=code-string>"</SPAN><SPAN class=code-string>2"</SPAN> cols=<SPAN class=code-string>"</SPAN><SPAN class=code-string>20"</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>/textarea<SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>br<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>submit"</SPAN> value=<SPAN class=code-string>"</SPAN><SPAN class=code-string>Submit"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/form<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/body<SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>/html<SPAN class=code-keyword>></SPAN>
登录后复制
alert(<SPAN class=code-string>"</SPAN><SPAN class=code-string>It seems you entered an invalid email address."</SPAN>) 
document.feedback.email.focus()
登录后复制
<SPAN class=code-keyword><</SPAN>script<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>!-- 
function validate() 
{ 
<SPAN class=code-keyword>if</SPAN>(document.login.userName.value==<SPAN class=code-string>"</SPAN><SPAN class=code-string>"</SPAN>) 
{ 
  alert (<SPAN class=code-string>"</SPAN><SPAN class=code-string>Please enter User Name"</SPAN>) 
  <SPAN class=code-keyword>return</SPAN> <SPAN class=code-keyword>false</SPAN> 
} 
<SPAN class=code-keyword>if</SPAN>(document.login.password.value==<SPAN class=code-string>"</SPAN><SPAN class=code-string>"</SPAN>) 
{ 
  alert (<SPAN class=code-string>"</SPAN><SPAN class=code-string>Please enter Password"</SPAN>) 
  <SPAN class=code-keyword>return</SPAN> <SPAN class=code-keyword>false</SPAN> 
} 
} 
<SPAN class=code-comment>//</SPAN><SPAN class=code-comment>--> 
</SPAN> 
<SPAN class=code-keyword><</SPAN>/script<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>form name=<SPAN class=code-string>"</SPAN><SPAN class=code-string>login"</SPAN> onsubmit=<SPAN class=code-string>"</SPAN><SPAN class=code-string>return validate()"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>text"</SPAN> size=<SPAN class=code-string>"</SPAN><SPAN class=code-string>20"</SPAN> name=<SPAN class=code-string>"</SPAN><SPAN class=code-string>userName"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>text"</SPAN> size=<SPAN class=code-string>"</SPAN><SPAN class=code-string>20"</SPAN> name=<SPAN class=code-string>"</SPAN><SPAN class=code-string>password"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>submit"</SPAN> name=<SPAN class=code-string>"</SPAN><SPAN class=code-string>submit"</SPAN> value=<SPAN class=code-string>"</SPAN><SPAN class=code-string>Submit"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/form<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>SCRIPT</SPAN> <SPAN class=code-attribute>Language</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>JavaScript"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword>function</SPAN> checkLogin(x) 
{ 
<SPAN class=code-keyword>if</SPAN> ((x.id.value != <SPAN class=code-string>"</SPAN><SPAN class=code-string>Sam"</SPAN>)||(x.pass.value !=<SPAN class=code-string>"</SPAN><SPAN class=code-string>Sam123"</SPAN>)) 
{ 
  alert(<SPAN class=code-string>"</SPAN><SPAN class=code-string>Invalid Login"</SPAN>); 
  <SPAN class=code-keyword>return</SPAN> <SPAN class=code-keyword>false</SPAN>; 
} 
<SPAN class=code-keyword>else</SPAN> 
  location=<SPAN class=code-string>"</SPAN><SPAN class=code-string>main.htm"</SPAN> 
} 
<SPAN class=code-keyword></</SPAN><SPAN class=code-leadattribute>script</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>/head<SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>body<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>form<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>p<SPAN class=code-keyword>></SPAN>UserID:<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>text"</SPAN> name=<SPAN class=code-string>"</SPAN><SPAN class=code-string>id"</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>/p<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>p<SPAN class=code-keyword>></SPAN>Password:<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>password"</SPAN> name=<SPAN class=code-string>"</SPAN><SPAN class=code-string>pass"</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>/p<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>p<SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>button"</SPAN> value=<SPAN class=code-string>"</SPAN><SPAN class=code-string>Login"</SPAN> onClick=<SPAN class=code-string>"</SPAN><SPAN class=code-string>checkLogin(this.form)"</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>/p<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/form<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/body<SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>/html<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>a href=<SPAN class=code-string>"</SPAN><SPAN class=code-string>JavaScript:window.location.reload()"</SPAN><SPAN class=code-keyword>></SPAN>Click to reload!<SPAN class=code-keyword><</SPAN>/a<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>a href=<SPAN class=code-string>"</SPAN><SPAN class=code-string>#"</SPAN> onClick=<SPAN class=code-string>"</SPAN><SPAN class=code-string>alert('Hello, world!')"</SPAN><SPAN class=code-keyword>></SPAN>Click me to say Hello<SPAN class=code-keyword><</SPAN>/a<SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>br<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>a href=<SPAN class=code-string>"</SPAN><SPAN class=code-string>#"</SPAN> onMouseOver=<SPAN class=code-string>"</SPAN><SPAN class=code-string>location='main.htm'"</SPAN><SPAN class=code-keyword>></SPAN>Mouse over to see Main Page<SPAN class=code-keyword><</SPAN>/a<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>HTML<SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>HEAD<SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>TITLE<SPAN class=code-keyword>></SPAN>Show 
Date<SPAN class=code-keyword><</SPAN>/TITLE<SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>/HEAD<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>BODY<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>SCRIPT LANGUAGE=<SPAN class=code-string>"</SPAN><SPAN class=code-string>JavaScript"</SPAN><SPAN class=code-keyword>></SPAN> 
var x= <SPAN class=code-keyword>new</SPAN> Date(); 
document.write (x); 
<SPAN class=code-keyword><</SPAN>/SCRIPT<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/BODY<SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN>/HTML<SPAN class=code-keyword>></SPAN>
登录后复制
var banTime= <SPAN class=code-keyword>new</SPAN> Date() 
var ss=banTime.getHours() 
<SPAN class=code-keyword>if</SPAN> (ss<SPAN class=code-keyword><</SPAN>=12) 
  document.write(<SPAN class=code-string>"</SPAN><SPAN class=code-string>@@##@@"</SPAN>) 
<SPAN class=code-keyword>else</SPAN> 
  document.write(<SPAN class=code-string>"</SPAN><SPAN class=code-string>@@##@@"</SPAN>)
登录后复制
<SPAN class=code-keyword><</SPAN>form<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>button"</SPAN> value=<SPAN class=code-string>"</SPAN><SPAN class=code-string>Click here to see"</SPAN> onclick=<SPAN class=code-string>"</SPAN><SPAN class=code-string>window.open('test.htm')"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/form<SPAN class=code-keyword>></SPAN>
登录后复制
open(<SPAN class=code-string>"</SPAN><SPAN class=code-string>URL"</SPAN>,<SPAN class=code-string>"</SPAN><SPAN class=code-string>name"</SPAN>,<SPAN class=code-string>"</SPAN><SPAN class=code-string>attributes"</SPAN>)
登录后复制
<SPAN class=code-keyword><</SPAN>form<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>button"</SPAN> value=<SPAN class=code-string>"</SPAN><SPAN class=code-string>Click here to see"</SPAN> 
onclick=<SPAN class=code-string>"</SPAN><SPAN class=code-string>window.open('page2.htm','win1','width=200,height=200,menubar')"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/form<SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>form<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>button"</SPAN> value=<SPAN class=code-string>"</SPAN><SPAN class=code-string>Click here to see"</SPAN> 
onclick=<SPAN class=code-string>"</SPAN><SPAN class=code-string>window.open('page2.htm','win1','width=200,height=200')"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/form<SPAN class=code-keyword>></SPAN>
登录后复制
window.location.reload()
登录后复制
<SPAN class=code-keyword><</SPAN>form<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>input type=<SPAN class=code-string>"</SPAN><SPAN class=code-string>button"</SPAN> value=<SPAN class=code-string>"</SPAN><SPAN class=code-string>Close Window"</SPAN> onClick=<SPAN class=code-string>"</SPAN><SPAN class=code-string>window.close()"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>/form<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>a href=<SPAN class=code-string>"</SPAN><SPAN class=code-string>javascript:window.close()"</SPAN><SPAN class=code-keyword>></SPAN>Close Window<SPAN class=code-keyword><</SPAN>/a<SPAN class=code-keyword>></SPAN>
登录后复制
window.location=<SPAN class=code-string>"</SPAN><SPAN class=code-string>test.htm"</SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>a href=<SPAN class=code-string>"</SPAN><SPAN class=code-string>test.htm>Try this </a></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN>script<SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN>!-- 
function ss() 
{ 
var ok=confirm(<SPAN class=code-string>'</SPAN><SPAN class=code-string>Click "OK" to go to yahoo, "CANCEL" to go to hotmail'</SPAN>) 
<SPAN class=code-keyword>if</SPAN> (ok) 
location=<SPAN class=code-string>"</SPAN><SPAN class=code-string>http://www.yahoo.com"</SPAN> 
<SPAN class=code-keyword>else</SPAN> 
location=<SPAN class=code-string>"</SPAN><SPAN class=code-string>http://www.hotmail.com"</SPAN> 
} 
<SPAN class=code-comment>//</SPAN><SPAN class=code-comment>--> 
</SPAN> 
<SPAN class=code-keyword><</SPAN>/script<SPAN class=code-keyword>></SPAN>
登录后复制
aa=window.open(<SPAN class=code-string>'</SPAN><SPAN class=code-string>test.htm'</SPAN>,<SPAN class=code-string>'</SPAN><SPAN class=code-string>'</SPAN>,<SPAN class=code-string>'</SPAN><SPAN class=code-string>width=200,height=200'</SPAN>)
登录后复制
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>title</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>title</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>form</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>input</SPAN> <SPAN class=code-attribute>type</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>button"</SPAN> <SPAN class=code-attribute>value</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>Open another page"</SPAN> 
<SPAN class=code-attribute>onClick</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>aa=window.open('test.htm','','width=200,height=200')"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>input</SPAN> <SPAN class=code-attribute>type</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>radio"</SPAN> <SPAN class=code-attribute>name</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>x"</SPAN> <SPAN class=code-attribute>onClick</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>aa.document.bgColor='red'"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>input</SPAN> <SPAN class=code-attribute>type</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>radio"</SPAN> <SPAN class=code-attribute>name</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>x"</SPAN> <SPAN class=code-attribute>onClick</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>aa.document.bgColor='green'"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>input</SPAN> <SPAN class=code-attribute>type</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>radio"</SPAN> <SPAN class=code-attribute>name</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>x"</SPAN> <SPAN class=code-attribute>onClick</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>aa.document.bgColor='yellow'"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>form</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>title</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>title</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>form</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>input</SPAN> <SPAN class=code-attribute>type</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>button"</SPAN> <SPAN class=code-attribute>value</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>Open another page"</SPAN> 
<SPAN class=code-attribute>onClick</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>aa=window.open('test.htm','','width=100,height=200')"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>form</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>title</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>title</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>script</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword>function</SPAN> remote(url){ 
window.opener.location=url 
} 
<SPAN class=code-keyword></</SPAN><SPAN class=code-leadattribute>script</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>head</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>p</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>a</SPAN> <SPAN class=code-attribute>href</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>#"</SPAN> <SPAN class=code-attribute>onClick</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>remote('file1.htm')"</SPAN><SPAN class=code-keyword>></SPAN>File 
1<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>a</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>p</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>p</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>a</SPAN> <SPAN class=code-attribute>href</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>#"</SPAN> <SPAN class=code-attribute>onClick</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>remote('file2.htm')"</SPAN><SPAN class=code-keyword>></SPAN>File 
2<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>a</SPAN><SPAN class=code-keyword>></SPAN><SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>p</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>frameset</SPAN> <SPAN class=code-attribute>cols</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>150,*"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>frame</SPAN> <SPAN class=code-attribute>src</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>page1.htm"</SPAN> <SPAN class=code-attribute>name</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>frame1"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>frame</SPAN> <SPAN class=code-attribute>src</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>page2.htm"</SPAN> <SPAN class=code-attribute>name</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>frame2"</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>frameset</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制
 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>h2</SPAN><SPAN class=code-keyword>></SPAN>This is page 1 <SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>h2</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-leadattribute>a</SPAN> <SPAN class=code-attribute>href</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>page3.htm"</SPAN> 
<SPAN class=code-attribute>onClick</SPAN><SPAN class=code-keyword>="</SPAN><SPAN class=code-keyword>parent.frame2.location='page4.htm'"</SPAN><SPAN class=code-keyword>></SPAN>Click Here<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>a</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>body</SPAN><SPAN class=code-keyword>></SPAN> 
<SPAN class=code-keyword><</SPAN><SPAN class=code-keyword>/</SPAN><SPAN class=code-leadattribute>html</SPAN><SPAN class=code-keyword>></SPAN>
登录后复制

Date object
Methods
getDate
getTime
getTimezoneOffset
 getDay
getMonth
getYear 		getSeconds
getMinutes
getHours
width height toolbar
location directories status
scrollbars resizable menubar
java速学教程(入门到精通)
java速学教程(入门到精通)

java怎么学习？java怎么入门？java在哪学？java怎么学才快？不用担心，这里为大家提供了java速学教程(入门到精通)，有需要的小伙伴保存下载就能学习啦！

下载
来源：php中文网
收藏 点赞
上一篇：javascript 数组的方法集合_基础知识 下一篇：js程序中美元符号$是什么_javascript技巧
本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系admin@php.cn
最新问题
js如何实现多语言切换 前端国际化i18n解决方案 实现前端多语言切换的核心在于根据用户语言偏好动态加载对应语言包并替换页面内容。具体步骤如下：1.通过URL参数、Cookie或浏览器语言确定用户首选语言，优先级为URL参数＞Cookie＞浏览器语言；2.将不同语言文本存储在独立JSON文件中，并通过fetch或import方式异步加载；3.使用DOM操作、模板引擎或框架指令（如Vue自定义指令）替换页面文本；4.提供语言切换界面，在用户选择后更新Cookie或URL参数并重新加载语言包；5.对于动态加载内容，可通过MutationObserve
2025-06-17 20:00:02
459
js如何检测硬盘空间 浏览器存储空间检测方法 现代JavaScript无法直接检测硬盘空间，但可通过navigator.storageAPI检测浏览器存储配额。1.使用navigator.storage.estimate()获取usage（已用）和quota（配额）值；2.通过persist()请求持久化存储以避免数据被清除；3.通过persisted()检查是否启用持久化。该机制出于安全限制，并非反映真实硬盘容量。若需应对存储不足，可清理缓存、使用IndexedDB或优化数据存储策略。quota值受用户硬盘、浏览器配置等因素动态影响，且仅
2025-06-17 19:00:02
808
JS如何实现元素呼吸效果 3种CSS动画打造呼吸式特效 CSS实现元素呼吸效果有3种方法：1.使用Scale动画，通过transform:scale()实现缩放；2.结合Opacity动画，在缩放的同时改变透明度；3.用多关键帧控制更复杂的效果。调整速度可修改animation时间值，增大scale数值提升幅度。多数情况下CSS动画性能良好，但大量复杂动画可能影响流畅度，需用工具监测优化。此外也可用JavaScript或UI库实现，但CSS更简洁高效。
2025-06-17 17:51:02
817
js中多个异步条件怎么顺序判断 在JavaScript中处理多个异步条件顺序判断的最佳方式是使用Promise链或async/await。1.Promise链通过.then()依次执行每个异步条件，并可在每个步骤中进行判断和短路操作，但代码较长且容易嵌套过深；2.async/await则以更直观、同步化的方式编写异步逻辑，提升可读性和维护性；3.为避免Promise链过长，可拆分逻辑为独立函数、使用async/await、良好命名及借助工具库优化；4.错误处理可通过.catch()统一捕获或在async函数中使用try/cat
2025-06-17 17:18:02
739
JS怎样生成组织结构图 4种布局算法可视化树形数据结构 生成组织结构图的核心在于将层级数据转换为DOM并应用布局算法。首先，使用JSON表示组织层级，接着通过递归函数将其转为DOM结构，最后选择合适的布局算法进行可视化。常见的布局算法包括：1.TidyTree适合清晰层级；2.ClusterDendrogram用于聚类展示；3.RadialTree适用于大型结构；4.Force-DirectedGraph适合复杂关系。用D3.js实现TidyTree需定义布局、创建SVG并绘制节点与连线。交互方面，通过点击事件切换子节点的显示状态并重新渲染图表以实现
2025-06-17 16:57:01
972
js如何实现拖放排序 元素拖拽排序与位置交换实现 拖放排序可通过JS实现，核心在于监听dragstart、dragover、drop事件并交换元素位置。首先HTML结构需设置可拖动的列表元素，每个li添加draggable="true"；其次CSS添加可拖动样式提示；接着JS逻辑通过监听事件控制拖动流程，并利用getDragAfterElement函数计算插入位置；最后优化体验可通过视觉反馈、性能优化和移动端适配实现，常见应用于任务管理、电商网站和后台管理系统。
2025-06-17 16:54:02
444
js如何获取DOM元素 DOM元素获取的5种常用方法 获取DOM元素的方法有五种，分别是document.getElementById()、document.getElementsByClassName()、document.getElementsByTagName()、document.querySelector()和document.querySelectorAll()。1.document.getElementById()通过id获取单个元素，但id必须唯一；2.document.getElementsByClassName()通过class
2025-06-17 15:57:01
926
js如何检测打印机 网页打印状态检测方法汇总 检测JavaScript中打印机状态没有直接通用API，但可通过曲线策略实现。1.window.print()事件监听只能确认对话框关闭，无法区分成功打印或取消；2.matchMedia查询可检测进入或离开打印预览状态，但无法确认实际打印行为；3.后端配合通过发送打印任务并轮询或WebSocket查询状态，相对可靠但需额外开发成本；4.第三方库基于上述方法封装，可靠性取决于具体实现。此外，避免内容丢失应使用@mediaprint优化样式、避免绝对定位、控制分页并进行打印预览测试。JavaScri
2025-06-17 12:15:01
933
js中如何用对象替代多个if判断 使用对象替代多个if判断的核心答案是通过构建映射对象实现条件与操作的对应关系，从而提升代码可读性和维护性。具体步骤如下：1.创建映射对象，键为条件，值为对应的执行函数；2.使用变量或表达式作为键动态查找操作；3.若找到则执行该操作，否则执行默认操作。例如通过对象字面量定义actionMap，并用actionType查找对应函数，最后调用执行。性能上，对象查找时间复杂度接近O(1)，优于if-else链在大量条件时的表现，但在条件较少或需要短路求值的情况下，if语句可能更合适。此外，当条件逻辑复杂
2025-06-17 11:24:02
997
js怎么检测网络连接状态 js检测网络状态的3种方法解析 JavaScript检测网络状态主要依赖navigator.onLine属性和online/offline事件，但存在局域网误判问题；①navigator.onLine返回浏览器是否能访问网络接口，但无法确认真实互联网连接；②监听online/offline事件可实时响应状态变化，但同样存在上述局限；③结合服务器心跳检测最为可靠，通过定期请求服务器判断实际联网状态，但需服务器配合并增加负载；④处理离线操作可通过ServiceWorker缓存资源、IndexedDB存储大量数据或localStor
2025-06-17 09:57:01
799
相关专题
更多>
热门推荐
开源免费商场系统广告
热门教程
更多>
相关推荐
热门推荐
最新课程
最新下载
更多>
网站特效
网站源码
网站素材
前端模板
关于我们 免责申明 意见反馈 讲师合作 广告合作 最新更新
php中文网：公益在线php培训，帮助PHP学习者快速成长！
关注服务号 技术交流群
app下载
PHP中文网订阅号
每天精选资源文章推送
PHP中文网APP
随时随地碎片化学习
PHP中文网抖音号
发现有趣的

Copyright 2014-2025 https://www.php.cn/ All Rights Reserved | php.cn | 湘ICP备2023035733号

  • PHP学习

  • 技术支持

  • 返回顶部