?????? ??

avaScript? ????? ?????. ?? ??? ??? ??? ?????.

JavaScript ??

JavaScript? ???? ?????.

?????? ??? ????? ?????.

JavaScript Literal

????? ???? ???? 3.14??? ?? ?????.

?? ???? ??, ??? ?? ??? ???(e)? ? ????.

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<p id="demo"></p>
<script>
    document.getElementById("demo").innerHTML = 123e5;
</script>
</body>
</html>

????? ???? ??? ???

??? ??? ?????? ????? ??? ? ????:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<p id="demo">andy</p>
<script>
    document.getElementById("demo").innerHTML = 'liu qi';
</script>
</body>
</html>

????? ???? ??? ???

?? ???? ??? ?????.

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<p id="demo"></p>
<script>
    document.getElementById("demo").innerHTML = 5 * 10;
</script>
</body>
</html>

????? ???? ??? ???

Array ???? ??? ?????:

[40, 100, 1, 5, 25, 10]

Object ???? ??? ?????:

{firstName:"John ", lastName:"Doe", age:50, eyeColor:"blue"}

Function(??) ???? ??? ?????.

function myFunction(a, b) { return a * b;}

JavaScript ??

????? ???? ??? ??? ?? ???? ? ?????. ??? ?????. ???? ????.

JavaScript? var ???? ???? ??? ???? ??? ???? ??? ?? ?????.

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<p id="demo"></p>
<script>
    var length;
    length = 6;
    document.getElementById("demo").innerHTML = length;
</script>
</body>
</html>

????? ???? ??? ???

JavaScript ???

JavaScript? ?? ???? ???? ?? ?????.

<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>php中文網(wǎng)(php.cn)</title> 
</head>
<body>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = (5 + 6) * 10;
</script>
</body>
</html>

????? ???? ??? ???

JavaScript? ?? ???? ???? ??? ?? ?????.

<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>php中文網(wǎng)(php.cn)</title> 
</head>
<body>
<p id="demo"></p>
<script>
var x, y, z;
x = 5
y = 6;
z = (x + y) * 10;
document.getElementById("demo").innerHTML = z;
</script>
</body>
</html>

????? ???? ??? ???

JavaScript ???? ??? ??? ???? ????.

Type Instance ??

??, ?? ? ?? ??? = + - * / JS ???? ???

??, ?? ? ???? ???

== != <

? ??? JS ?? ???

JavaScript ?

HTML?? JavaScript ?? ????? ???? ?????.

?? ?????? ?????.

x = 5 + 6;
y = x * 10;

JavaScript ???

JavaScript ?? ????? ???? ?????. var ???? ????? ? ??? ????? ?????.

var x = 5 + 6;

var y = x * 10;

JavaScript ???
, JavaScript? ?? ??? ?? ?? ???? ?????.

JavaScript? ?? ?? ?? ????? ???? ??? ?? JavaScript ????? ??? ?? ???? ?????.

JavaScript ???? ??, ??(_) ?? ?? ??($)? ???? ???.

?? ??? ??, ??, ?? ?? ?? ??? ? ????(??????? ???? ??? ?? ??? ? ??? ??? ? ?? ??? ??? ? ????).

??? JavaScript?? ?? ??? ??????(????):

in staticwithJavaScript 對(duì)大小寫敏感。JavaScript 對(duì)大小寫是敏感的。當(dāng)編寫JavaScript 語(yǔ)句時(shí)，請(qǐng)留意是否關(guān)閉大小寫切換鍵。函數(shù)?getElementById?與?getElementbyID 是不同的。同樣，變weight?myVariable?與?MyVariable?也? ?? ????.

abstract	else	instanceof	super

boolean	enum	int	switch

break	export	interface	synchronized

byte	extends	let	this

case	false	long	throw

catch	final	????	throws

char	finally	new	transient

class	float	null	true

const	for	???	try

continue	function	private	typeof

???	goto	protected	var

default	if	public	void

delete	implements	return	??? ???
			??



		???? ?? \|\| ??? ?? <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>php中文網(wǎng)(php.cn)</title> </head> <body> <p id="demo"></p> <script> document.getElementById("demo").innerHTML = 123e5; </script> </body> </html> ?????? ??? ???? ?? ?? ?? ?? ???? ?? ??? ?? ?? ?? ???? ???? ????JavaScript ?? ???? 9246?? ???? ????. ????JQuery ?? ?? ???? 41602?? ???? ????. ????Python ?? ?? ???? 129154?? ???? ????. ????RSS ???? ?? ???? 7399?? ???? ????. ????HTML5 ?? ?? ???? 14069?? ???? ????. ????PHP ?? ?? ?? ???? 176456?? ???? ????. ????HTML+CSS ?? ?? ???? 82953?? ???? ????. ????CSS 0 ?? ?? ???? 24679?? ???? ????. ????PHP ?? ??? ?? ???? 19203?? ???? ????. ????2017? ?? jQuery ?? ???? 7773?? ???? ????. ????HTML/CSS 5?? ?? ?? ???? 26681?? ???? ????. ????Python ????? ?? ??? ???? ??? 36033?? ???? ????. ?? ????? ????? ? ????. ?? ???? ???? ????. ???? ? ??? ?? ?? ??????~ ? ??? ??? ???? ???? ????. 495461? ?? PHP? ??? ???? ??? ?? ??? ???? ?????. ? ??? ?? ??? ?? ?? ?? ??? ?? ???? ???? ??? Mini ?? MVC ?????? ??? ?? Tianlongbabu ?? PHP ?? ?? ????: ?? PHP ?? [???? ??] ??? ?? ? ??? ??? ??? ???? ?? ?? ?? ?? Node.JS ?? ?? ??? ?? ? ???? ????? ??: HTML5/CSS3/ES6/NPM/Vue/...[??] ???? PHP MVC ????? ??(?? ?? 40? ?/??? ??/???? ????? ??? ?) ?? X ???? ??? PHP ??，PHP ???? ?? ??? ?????！ ?? ?? ?? ?? Sitemap ? php.cn All rights reserved 感谢您访问我们的网站，您可能还对以下资源感兴趣：亚洲国产日韩欧美一区二区三区