Просмотр исходного текста страницы JavaScript Tutorial/Operators/Operator Precedence

== Operator order in action==



   
  <!-- start source code -->
   
    <source lang="javascript">
<html>
<head>
<title>A Simple Page</title>
<script language="JavaScript">
<!--
alert(3 - 1 * 6);
alert((3 - 1) * 6);
//  -->
</script>
</head>
<body>
</body>
</html></source>
    
   

== Operator Precedence from highest to lowest==

Read From
Operator
Operator Name
Left to Right
.
Object property access
Left to Right
[]
Array index
Left to Right
()
Function call
Right to Left
++
Pre/Post Increment
Right to Left
--
Pre/Post Decrement
Right to Left
-
Negation
Right to Left
~
Bitwise NOT
Right to Left
!
Logical NOT
Right to Left
delete
Undefine a property
Right to Left
new
Create a new object
Right to Left
typeof
Return data type
Right to Left
void
Return undefined value
Left to Right
*, /, %
Multiplication, division, modulus
Left to Right
+, -
Addition, Subtraction
Left to Right
+
String concatenation
Left to Right
<<
Left shift
Left to Right
>>
Right shift with sign
Left to Right
>>>
Right shift zero fill
Left to Right
<, <=
Less than, less than or equal
Left to Right
>, >=
Greater than, greater than or equal
Left to Right
==
Equality
Left to Right
!=
Inequality
Left to Right
===
Identity
Left to Right
!==
Non-identity
Left to Right
&
Bitwise AND
Left to Right
^
Bitwise XOR
Left to Right
|
Bitwise OR
Left to Right
&&
Logical AND
Left to Right
||
Logical OR
Right to Left
?:
Conditional
Right to Left
=
Assignment
Right to Left
*=, /=
Assignment plus operation %=, +=, -=, <<=, >>=, >>>=, &=, ^=, |=
Left to Right
.
Multiple evaluation