hasOwnProperty (JavaScript)

Checks whether a string has a specified property.

Defined in

Syntax

hasOwnProperty(property:string) : boolean

Parameters	Description
`property`	The name of a property.

Return value	Description
`boolean`	True if the object has the property; otherwise false.

Examples

This example returns true or false for three properties.

var regexp = /(Moscow)/;
return "constructor = " + regexp.hasOwnProperty("constructor") +
	"\nlength = " + regexp.hasOwnProperty("length") +
	"\nprototype = " + regexp.hasOwnProperty("prototype")