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    <title>JSDoc: Source: polyfill/Intl/NumberFormat.js</title>

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    <h1 class="page-title">Source: polyfill/Intl/NumberFormat.js</h1>

    
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        <article>
            <pre class="prettyprint source linenums"><code>// Licensed Materials - Property of IBM
//
// IBM Watson Analytics
//
// (C) Copyright IBM Corp. 2018
//
// US Government Users Restricted Rights - Use, duplication or
// disclosure restricted by GSA ADP Schedule Contract with IBM Corp.

module.exports = ( function( Format )
{
"use strict";
/**
 * These classes are NOT a polyfill, and are not meant to be!
 * They provide a poor man's fallback for the Intl formatters, for non-compliant environments.
 */

var reCurrencyCode = /^[A-Z]{3}$/;
var nbsp = String.fromCharCode( 160 );

/**
 * Object that parses an Options object and normalizes it to options.
 * @class module:barejs/polyfill/Intl.NumberFormat~NumberFormatOptions
 */
function NumberFormatOptions( _options )
{
    // MinimumFractionDigits is usually 0
    this.minimumFractionDigits = 0;
    this.maximumFractionDigits = 3;
    this.minimumIntegerDigits = 1;
    this.numberingSystem = "latn";
    this.useGrouping = true;

    switch ( "style" in _options ? _options.style : "decimal" )
    {
        case "percent":
            this.style = "percent";
            this.maximumFractionDigits = Math.max( 0, this.minimumFractionDigits );
            break;
        case "currency":
            this.style = "currency";
            if ( !_options.currency )
                throw new TypeError( "Currency code is required with currency style." );
            if ( ( typeof _options.currency !== "string" ) || !reCurrencyCode.test( _options.currency ) )
                throw new TypeError( "Invalid currency code:" + _options.currency );
            this.currency = _options.currency;
            this.currencyDisplay = "code"; // This is all the fallback supports!
            this.maximumFractionDigits = Math.max( 2, this.minimumFractionDigits );
            break;
        case "decimal":
            this.style = "decimal";
            break;

        default:
            throw new RangeError( "Value " + _options.style + " out of range for numberformat options property style" );
    }
}


/**
 * Provides number formatting
 * @class module:barejs/polyfill/Intl.NumberFormat
 * @extends module:barejs/polyfill/Intl~Format
 */
function NumberFormat( _locales, _options )
{
    Format.call( this, _locales, new NumberFormatOptions( Object( _options ) ) );
}

NumberFormat.prototype = Object.create( Format.prototype,
/** @lends module:barejs/polyfill/Intl.NumberFormat# */
{
    constructor: { writable: true, value: NumberFormat },

    format:
    {
        enumerable: true,
        value: function format( _value )
        {
            if ( _value === null || typeof _value === "undefined" )
                return "";
            var value = +_value;
            var prefix = "";
            var suffix = "";

            if ( isNaN( value ) )
                return "NaN";

            switch( this._options.style )
            {
                case "percent":
                    value *= 100;
                    suffix = "%";
                    break;

                case "currency":
                    prefix = this._options.currency + nbsp;
                    break;
            }

            // We're currently ignoring min/max decimal places (which is bad).
            return prefix + value.toLocaleString() + suffix;
        }
    }
} );

return NumberFormat;

}( require( "./Format" ) ) );
</code></pre>
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