jquery-extendext.js

/*!
 * jQuery.extendext 1.0.0
 *
 * Copyright 2014-2019 Damien "Mistic" Sorel (http://www.strangeplanet.fr)
 * Licensed under MIT (http://opensource.org/licenses/MIT)
 * 
 * Based on jQuery.extend by jQuery Foundation, Inc. and other contributors
 */

(function (root, factory) {
    if (typeof define === 'function' && define.amd) {
        define(['jquery'], factory);
    }
    else if (typeof module === 'object' && module.exports) {
        module.exports = factory(require('jquery'));
    }
    else {
        factory(root.jQuery);
    }
}(this, function ($) {
    "use strict";

    $.extendext = function () {
        var options, name, src, copy, copyIsArray, clone,
            target = arguments[0] || {},
            i = 1,
            length = arguments.length,
            deep = false,
            arrayMode = 'default';

        // Handle a deep copy situation
        if (typeof target === "boolean") {
            deep = target;

            // Skip the boolean and the target
            target = arguments[i++] || {};
        }

        // Handle array mode parameter
        if (typeof target === "string") {
            arrayMode = target.toLowerCase();
            if (arrayMode !== 'concat' && arrayMode !== 'replace' && arrayMode !== 'extend') {
                arrayMode = 'default';
            }

            // Skip the string param
            target = arguments[i++] || {};
        }

        // Handle case when target is a string or something (possible in deep copy)
        if (typeof target !== "object" && !$.isFunction(target)) {
            target = {};
        }

        // Extend jQuery itself if only one argument is passed
        if (i === length) {
            target = this;
            i--;
        }

        for (; i < length; i++) {
            // Only deal with non-null/undefined values
            if ((options = arguments[i]) !== null) {
                // Special operations for arrays
                if ($.isArray(options) && arrayMode !== 'default') {
                    clone = target && $.isArray(target) ? target : [];

                    switch (arrayMode) {
                    case 'concat':
                        target = clone.concat($.extend(deep, [], options));
                        break;

                    case 'replace':
                        target = $.extend(deep, [], options);
                        break;

                    case 'extend':
                        options.forEach(function (e, i) {
                            if (typeof e === 'object') {
                                var type = $.isArray(e) ? [] : {};
                                clone[i] = $.extendext(deep, arrayMode, clone[i] || type, e);

                            } else if (clone.indexOf(e) === -1) {
                                clone.push(e);
                            }
                        });

                        target = clone;
                        break;
                    }

                } else {
                    // Extend the base object
                    for (name in options) {
                        copy = options[name];

                        // Prevent never-ending loop
                        if (name === '__proto__' || target === copy) {
                            continue;
                        }

                        // Recurse if we're merging plain objects or arrays
                        if (deep && copy && ( $.isPlainObject(copy) ||
                            (copyIsArray = $.isArray(copy)) )) {
                            src = target[name];

                            // Ensure proper type for the source value
                            if ( copyIsArray && !Array.isArray( src ) ) {
                                clone = [];
                            } else if ( !copyIsArray && !$.isPlainObject( src ) ) {
                                clone = {};
                            } else {
                                clone = src;
                            }
                            copyIsArray = false;

                            // Never move original objects, clone them
                            target[name] = $.extendext(deep, arrayMode, clone, copy);

                            // Don't bring in undefined values
                        } else if (copy !== undefined) {
                            target[name] = copy;
                        }
                    }
                }
            }
        }

        // Return the modified object
        return target;
    };
}));