PHP `empty` Function Using Lodash

_.empty.js

/**
 * Lodash version of PHP's `empty` function.
 *
 * @author Davey Jacobson <daveyjake21 [at] geemail [dot] com>
 * @since 1.0.0 Initial private gist.
 * @since 1.1.0 Gist made public.
 * @since 1.1.1 Additional checks for 'null' and 'undefined' as strings.
 * @since 1.1.2 Additional check for `NaN` and 'NaN' as a string. 
 *
 * @param {array|bool|number|object|string} $value The value to check.
 *
 * @return {bool} True if `value` is one of the conditions. False if not.
 */
function empty( $value ) {
    /**
     * Conditions we want to return as true.
     *
     * @since 1.0.0
     * @since 1.1.1 Added checks for 'null' and 'undefined'.
     * @since 1.1.2 Added check for `NaN` and 'NaN'.
     *
     * @type array
     */
    let conditions = [
        _.isEqual( $value, 0 ),
        _.isEqual( $value, '0' ),
        _.isEqual( $value, false ),
        _.isEqual( $value, 'false' ),
        _.isEqual( $value, '' ),
        _.isEqual( $value, [] ),
        _.isEqual( $value, {} ),
        _.isEqual( _.isNaN( $value ), true ),
        _.isEqual( $value, 'NaN' ),
        _.isEqual( _.isNull( $value ), true ),
        _.isEqual( $value, 'null' ),
        _.isEqual( _.isUndefined( $value ), true ),
        _.isEqual( $value, 'undefined' )
    ];

    // Convert boolean results to integers: true = 1; false = 0.
    conditions = _.map( conditions, _.toNumber );

    // Get the sum of the results.
    const result = _.reduce( conditions, ( a, b ) => {
        return a + b;
    });

    // If the result is greater than 0, we know it's empty.
    if ( result > 0 ) {
        return true;
    }

    return false;
}

// Add to Lodash object (i.e. make `_.empty` a usable function).
_.mixin({ 'empty': empty });