{{JSOperatorsQLAlpha()}}
Summary
The grouping operator ( )
controls the precedence of evaluation in expressions.
Syntax
( )
Description
The grouping operator consists of a pair of paratheses around an expression or sub-expression to override the normal operator precedence so that expressions with lower precedence can be evaluated before an expression with higher priority.
Examples
Overriding multiplication and division first, then addition and subtraction to evaulate addition first.
var a = 1; var b = 2; var c = 3; // default precedence a + b * c // 7 // evaluated by default like this a + (b * c) // 7 // now overriding precedence // addition before multiplication (a + b) * c // 9 // which is equivalent to a * c + b * c // 9
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 1st Edition. | Standard | Initial definition. Implemented in JavaScript 1.0 |
{{SpecName('ES5.1', '#sec-11.1.6', 'The Grouping Operator')}} | {{Spec2('ES5.1')}} | |
{{SpecName('ES6', '#sec-grouping-operator', 'The Grouping Operator')}} | {{Spec2('ES6')}} |
Browser compatibility
{{ CompatibilityTable() }}
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | {{ CompatVersionUnknown() }} | {{ CompatVersionUnknown() }} | {{ CompatVersionUnknown() }} | {{ CompatVersionUnknown() }} | {{ CompatVersionUnknown() }} |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | {{ CompatVersionUnknown() }} | {{ CompatVersionUnknown() }} | {{ CompatVersionUnknown() }} | {{ CompatVersionUnknown() }} | {{ CompatVersionUnknown() }} | {{ CompatVersionUnknown() }} |
See also
- Operator precedence
- {{jsxref("Operators/delete", "delete")}}
- {{jsxref("Operators/typeof", "typeof")}}