js文件之间传递值

Dear 丶 2022-06-02 08:56 409阅读 0赞

问题背景:

做web页面展示数据分页的时候,找了一个分页插件来用,插件直接引入一个js,插件全部都是js动态生成的,不好操作,但自己页面的js需要计算当前页,及总页数,这就需要把自己计算的结果与插件中的值统一,,所以需要在js文件之间传值.

解决办法:

使用cookie set值以后去另一个js文件get值即可.

具体实例步骤:

一 .引入   jquery.cookie.js   内容如下:

/**
     * Cookie plugin
     *
     * Copyright (c) 2006 Klaus Hartl (stilbuero.de)
     * Dual licensed under the MIT and GPL licenses:
     * http://www.opensource.org/licenses/mit-license.php
     * http://www.gnu.org/licenses/gpl.html
     *
     */
    
    /**
     * Create a cookie with the given name and value and other optional parameters.
     *
     * @example $.cookie('the_cookie', 'the_value');
     * @desc Set the value of a cookie.
     * @example $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secure: true });
     * @desc Create a cookie with all available options.
     * @example $.cookie('the_cookie', 'the_value');
     * @desc Create a session cookie.
     * @example $.cookie('the_cookie', null);
     * @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
     *       used when the cookie was set.
     *
     * @param String name The name of the cookie.
     * @param String value The value of the cookie.
     * @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
     * @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
     *                             If a negative value is specified (e.g. a date in the past), the cookie will be deleted.
     *                             If set to null or omitted, the cookie will be a session cookie and will not be retained
     *                             when the the browser exits.
     * @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
     * @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
     * @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
     *                        require a secure protocol (like HTTPS).
     * @type undefined
     *
     * @name $.cookie
     * @cat Plugins/Cookie
     * @author Klaus Hartl/klaus.hartl@stilbuero.de
     */
    
    /**
     * Get the value of a cookie with the given name.
     *
     * @example $.cookie('the_cookie');
     * @desc Get the value of a cookie.
     *
     * @param String name The name of the cookie.
     * @return The value of the cookie.
     * @type String
     *
     * @name $.cookie
     * @cat Plugins/Cookie
     * @author Klaus Hartl/klaus.hartl@stilbuero.de
     */
    jQuery.cookie = function(name, value, options) {
        if (typeof value != 'undefined') { // name and value given, set cookie
            options = options || {};
            if (value === null) {
                value = '';
                options = $.extend({}, options); // clone object since it's unexpected behavior if the expired property were changed
                options.expires = -1;
            }
            var expires = '';
            if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
                var date;
                if (typeof options.expires == 'number') {
                    date = new Date();
                    date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
                } else {
                    date = options.expires;
                }
                expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
            }
            // NOTE Needed to parenthesize options.path and options.domain
            // in the following expressions, otherwise they evaluate to undefined
            // in the packed version for some reason...
            var path = options.path ? '; path=' + (options.path) : '';
            var domain = options.domain ? '; domain=' + (options.domain) : '';
            var secure = options.secure ? '; secure' : '';
            document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
        } else { // only name given, get cookie
            var cookieValue = null;
            if (document.cookie && document.cookie != '') {
                var cookies = document.cookie.split(';');
                for (var i = 0; i < cookies.length; i++) {
                    var cookie = jQuery.trim(cookies[i]);
                    // Does this cookie string begin with the name we want?
                    if (cookie.substring(0, name.length + 1) == (name + '=')) {
                        cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                        break;
                    }
                }
            }
            return cookieValue;
        }
    };

二. 在需要传值的页面加入如下代码

/* cookie存储
    	-------------------------------------- */
    	function GetCookie(name) {
    		return $.cookie(name);
    	};
    	
    	function SetCookie(name, data) {
    		$.cookie(name, data, {
    			expires: 100
    		});
    		$.cookie(name, data, {
    			path: "/"
    		});
    	};

以及设置值

SetCookie("pageCounts",pageCounts);

取值

newPage = GetCookie("index");

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