RangeError - JavaScript 编辑

The RangeError object indicates an error when a value is not in the set or range of allowed values.

Description

A RangeError is thrown when trying to pass a value as an argument to a function that does not allow a range that includes the value.

This can be encountered when:

• passing a value that is not one of the allowed string values to String.prototype.normalize(), or
• when attempting to create an array of an illegal length with the Array constructor, or
• when passing bad values to the numeric methods Number.prototype.toExponential(), Number.prototype.toFixed() or Number.prototype.toPrecision().

Constructor

RangeError()

Creates a new RangeError object.

Instance properties

RangeError.prototype.message

Error message. Although ECMA-262 specifies that RangeError should provide its own message property, in SpiderMonkey, it inherits Error.prototype.message.

RangeError.prototype.name

Error name. Inherited from Error.

RangeError.prototype.fileName

Path to file that raised this error. Inherited from Error.

RangeError.prototype.lineNumber

Line number in file that raised this error. Inherited from Error.

RangeError.prototype.columnNumber

Column number in line that raised this error. Inherited from Error.

RangeError.prototype.stack

Stack trace. Inherited from Error.

Examples

Using RangeError (for numeric values)

function check(n)
{
    if( !(n >= -500 && n <= 500) )
    {
        throw new RangeError("The argument must be between -500 and 500.")
    }
}

try
{
    check(2000)
}
catch(error)
{
    if (error instanceof RangeError)
    {
        // Handle the error
    }
}

Using RangeError (for non-numeric values)

function check(value)
{
    if(["apple", "banana", "carrot"].includes(value) === false)
    {
        throw new RangeError('The argument must be an "apple", "banana", or "carrot".')
    }
}

try
{
    check("cabbage")
}
catch(error)
{
    if(error instanceof RangeError)
    {
        // Handle the error
    }
}

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Error
• Array
• Number.toExponential()
• Number.toFixed()
• Number.toPrecision()
• String.prototype.normalize()