Jquery - 单击时不适用于动态加载的元素

Question

我有一个通过 JS 加载到 DOM 中的 cookie 横幅，我正在尝试向该横幅上的关闭按钮添加一个点击事件。

jQuery(document).ready(function() {

    jQuery( 'body' ).on( 'click', '.ui-dialog-titlebar-close', function() {
        console.log('click');
    });

});

谁能告诉我如何让这个点击功能注册？我不明白为什么上面的代码不起作用。当我将选择器更改为在第一个实例中加载到页面上的元素并且它正常工作时，它工作正常，只是不喜欢动态加载的元素？

编辑：

这是完整的代码：

function setBannerCookie(){
   if(typeof tealiumBanner.setBannerCookie === 'function'){
       tealiumBanner.setBannerCookie();
   }
}

function setBannerCookie() {

    jQuery.cookie ("mmmBanner", "accepted", {expires:365, path:"/"});
    jQuery("#cookieBox").animate({height:"toggle"}, 500);

    var optOutMultiCookie = jQuery.cookie("OPTOUTMULTI");

    var cookieArray = optOutMultiCookie.split('|');

    for(var i=0;i<cookieArray.length;i++){
        var itemArray = cookieArray[i].split(':');
        newItem = itemArray[0] + ":0";
        cookieArray[i] = newItem;
    }

    cd = new Date();
    cd.setDate(cd.getDate() + 90);
    document.cookie = 'OPTOUTMULTI=' + cookieArray.join("|") + ';path=/;domain=' + utag.cfg.domain + ';expires=' + cd.toGMTString() + ";";
}

jQuery(document).ready(function() {

    if (jQuery.cookie("mmmBanner") == undefined) {
        jQuery.cookie ("mmmBanner", "waiting", {expires:365, path:"/"});
    }

    jQuery("#mmmCorpCookie").click(function (e) {
        e.preventDefault();
        if (typeof __tealiumMo2Div == 'undefined') {__tealiumMo2Div = document.createElement('SCRIPT');__tealiumMo2Div.type = 'text/javascript';__tealiumMo2Div.src = '//tags.tiqcdn.com/utag/3m/offp-it-it/prod/utag.tagsOptOut.js?cb='+Math.random();document.getElementsByTagName('head')[0].appendChild(__tealiumMo2Div);}else{__tealium.load();}
    });
    if (jQuery.cookie("mmmBanner") == undefined) {

        jQuery.cookie ("mmmBanner", "waiting", {expires:365, path:"/"});
    }
    if (jQuery.cookie("mmmBanner") === "waiting") {
        (function () {if (typeof __tealiumMo2Div == 'undefined') {__tealiumMo2Div = document.createElement('SCRIPT');__tealiumMo2Div.type = 'text/javascript';__tealiumMo2Div.src = '//tags.tiqcdn.com/utag/3m/offp-it-it/prod/utag.tagsOptOut.js?_cb='+Math.random();document.getElementsByTagName('head')[0].appendChild(__tealiumMo2Div);}else{__tealium.load();}})();
    }

});



/*!
 * jQuery Cookie Plugin v1.4.1
 * https://github.com/carhartl/jquery-cookie
 *
 * Copyright 2013 Klaus Hartl
 * Released under the MIT license
 */
(function (factory) {
    if (typeof define === 'function' && define.amd) {
        // AMD
        define(['jquery'], factory);
    } else if (typeof exports === 'object') {
        // CommonJS
        factory(require('jquery'));
    } else {
        // Browser globals
        factory(jQuery);
    }
}(function ($) {

    var pluses = /\+/g;

    function encode(s) {
        return config.raw ? s : encodeURIComponent(s);
    }

    function decode(s) {
        return config.raw ? s : decodeURIComponent(s);
    }

    function stringifyCookieValue(value) {
        return encode(config.json ? JSON.stringify(value) : String(value));
    }

    function parseCookieValue(s) {
        if (s.indexOf('"') === 0) {
            // This is a quoted cookie as according to RFC2068, unescape...
            s = s.slice(1, -1).replace(/\\"/g, '"').replace(/\\\\/g, '\\');
        }

        try {
            // Replace server-side written pluses with spaces.
            // If we can't decode the cookie, ignore it, it's unusable.
            // If we can't parse the cookie, ignore it, it's unusable.
            s = decodeURIComponent(s.replace(pluses, ' '));
            return config.json ? JSON.parse(s) : s;
        } catch(e) {}
    }

    function read(s, converter) {
        var value = config.raw ? s : parseCookieValue(s);
        return $.isFunction(converter) ? converter(value) : value;
    }

    var config = $.cookie = function (key, value, options) {

        // Write

        if (value !== undefined && !$.isFunction(value)) {
            options = $.extend({}, config.defaults, options);

            if (typeof options.expires === 'number') {
                var days = options.expires, t = options.expires = new Date();
                t.setTime(+t + days * 864e+5);
            }

            return (document.cookie = [
                encode(key), '=', stringifyCookieValue(value),
                options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE
                options.path    ? '; path=' + options.path : '',
                options.domain  ? '; domain=' + options.domain : '',
                options.secure  ? '; secure' : ''
            ].join(''));
        }

        // Read

        var result = key ? undefined : {};

        // To prevent the for loop in the first place assign an empty array
        // in case there are no cookies at all. Also prevents odd result when
        // calling $.cookie().
        var cookies = document.cookie ? document.cookie.split('; ') : [];

        for (var i = 0, l = cookies.length; i < l; i++) {
            var parts = cookies[i].split('=');
            var name = decode(parts.shift());
            var cookie = parts.join('=');

            if (key && key === name) {
                // If second argument (value) is a function it's a converter...
                result = read(cookie, value);
                break;
            }

            // Prevent storing a cookie that we couldn't decode.
            if (!key && (cookie = read(cookie)) !== undefined) {
                result[name] = cookie;
            }
        }

        return result;
    };

    config.defaults = {};

    $.removeCookie = function (key, options) {
        if ($.cookie(key) === undefined) {
            return false;
        }

        // Must not alter options, thus extending a fresh object...
        $.cookie(key, '', $.extend({}, options, { expires: -1 }));
        return !$.cookie(key);
    };

}));

jQuery(document).ready(function() {
    jQuery( 'body' ).on( 'click', '.ui-dialog-titlebar-close', function() {
        console.log('click');
    });
});

Answer 1

考虑到您正在使用 javascript 加载横幅：

tags.tiqcdn.com/utag/3m/offp-it-it/prod/utag.tagsOptOut.js

那么你必须在javascript已经加载并执行后附加onclick方法，你可以使用脚本html标签的onloaded属性来做到这一点。

例如：

__tealiumMo2Div = document.createElement('SCRIPT');
__tealiumMo2Div.type = 'text/javascript';
__tealiumMo2Div.src = '//tags.tiqcdn.com/utag/3m/offp-it-it/prod/utag.tagsOptOut.js?_cb='+Math.random();
__tealiumMo2Div.onload = function()
{
      jQuery( 'body' ).on( 'click', '.ui-dialog-titlebar-close', function() {
        console.log('click');
    });
};

document.getElementsByTagName('head')[0].appendChild(__tealiumMo2Div);

Answer 2

从 Jquery(document).ready 不需要它，因为您的内容是在页面加载后动态加载的。

改用following并将其放在</body>之前

jQuery(document).on( 'click', '.ui-dialog-titlebar-close', function() {
    console.log('click');
});

Answer 3

我会使用 setTimeout 来临时化 onclick 事件：

jQuery(document).ready(function() {
    setTimeout(function() {
       $('body').on( 'click', '.ui-dialog-titlebar-close', function() {
           console.log('click');
       });
    }, 10);
});