Javascript- , .
Javascript-
, javascript, html- <script></script>, <head></head>. <script> language, :
<html>
<head>
<title> </title>
<link rel="stylesheet" type="text/css" href="style.css">
<script language="javascript"> </script>
</head>
<body>
</body>
</html>
<script></script> ( <body></body>). , "" ( <script></script>). .
Javascript-
( ) script.js , html-:
javascript-. script.js html-. , , html <script>, (html - 2). html-:
<html>
<head>
<title> </title>
<link rel="stylesheet" type="text/css" href="style.css">
<script type="text/javascript" src="script.js"></script>
</head>
<body>
</body>
</html>
17. JavaScript: , , , .
number, string, () boolean, null, undefined, object
JavaScript
JavaScript
JavaScript 3 .
1. :
alert("My message");
.
2. :
confirm("Are you sure?");
2 : . true/flase.
3. :
prompt("Please, enter the text:");
. , NULL .
delete
function
in
instanceof
new
this
typeof
void
object.property object["property"]
+, -, *, /, %, ++, --
|
|
|
,
&&, ||,!
=, +=, -=, *=, /=, >>=, <<=, >>>=, &=, |=, ^=
==,!=, ===,!==, >, >=, <, <=
&, |, ^, ~, <<, >>, >>>
+, +=
condition? ifTrue: ifFalse
JavaScript.
, .
, , var:
var message;, :
var message;message = 'Hello'; //:
var message;message = 'Hello!'; alert(message); //:
var message = 'Hello!';:
var user = 'John', age = 25, message = 'Hello';
