@chriscodesthings/is-hex-number v1.3.0

is-hex-number

Function to determine if a string is a hexadecimal number

Description

Tests a variable to see if it's a hex number.

See...

• Install/Usage
• Syntax
• Examples
• See Also

Install

npm install --save @chriscodesthings/is-hex-number

Use

import isHexNumber from '@chriscodesthings/is-hex-number';

console.log(isHexNumber("c0ffee"));
// => true

Syntax

isHexNumber(str, float, prefix0x);

Parameters

• str: a string to test
• float (optional): if true, allow a floating point hex number
• prefix0x (optional): if true, allow the 0x prefix

Return Value

Returns boolean true if str is a valid hex number, false otherwise.

Examples

// convert to decimal or return null if invalid
function hex2dec(hex) {
    if( isHexNumber(hex)) {
        return parseInt(hex,16);
    }

    return null;
}

See Also...

• is-number: Function to determine if something is a number type
• is-string: Determine if something is a string type
• is-css-hex-color: Determine if a string is a hex color code