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Javascript 在AJAX驱动的站点上选择并激活正确的控件_Javascript_Jquery_Greasemonkey_Tampermonkey - Fatal编程技术网

Javascript 在AJAX驱动的站点上选择并激活正确的控件

Javascript 在AJAX驱动的站点上选择并激活正确的控件,javascript,jquery,greasemonkey,tampermonkey,Javascript,Jquery,Greasemonkey,Tampermonkey,因此,每次我访问任何nike.com运动鞋页面(没有HTML链接),它都会自动选择我的鞋码,将其添加到购物车中,并为我结账 我目前正在尝试使用此脚本(见下文),但每次我进入“运动鞋”页面时,它都不会正确添加我想要的鞋号,而是直接进入结帐,购物车中没有任何内容 我被告知需要将代码与实际的HTML页面匹配,但我不知道如何做到这一点。请帮忙 // ==UserScript== // @name _Nike auto-buy(!!!) script // @include http://*/*

因此,每次我访问任何nike.com运动鞋页面(没有HTML链接),它都会自动选择我的鞋码,将其添加到购物车中,并为我结账

我目前正在尝试使用此脚本(见下文),但每次我进入“运动鞋”页面时,它都不会正确添加我想要的鞋号,而是直接进入结帐,购物车中没有任何内容

我被告知需要将代码与实际的HTML页面匹配,但我不知道如何做到这一点。请帮忙

// ==UserScript==
// @name     _Nike auto-buy(!!!) script
// @include  http://*/*
// @require  http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
// @require  https://gist.github.com/raw/2625891/waitForKeyElements.js
// @grant    GM_addStyle
// ==/UserScript==
/*- The @grant directive is needed to work around a design change
    introduced in GM 1.0.   It restores the sandbox.
*/

var okayToClickAddtoCart = false;

//-- Assumes that size is a standard <option> tag or similar...
waitForKeyElements (".selectBox-label[value='10']", selectShoeSize);

function selectShoeSize (jNode) {
    jNode.prop ('selected', true);

    okayToClickAddtoCart = true;
}


waitForKeyElements (".add-to-cart.nike-button", clickAddToCart);

function clickAddToCart (jNode) {
    if ( ! okayToClickAddtoCart) {
        return true;    //-- Don't click yet.
    }

    var clickEvent  = document.createEvent ('MouseEvents');
    clickEvent.initEvent ('click', true, true);
    jNode[0].dispatchEvent (clickEvent);
}


waitForKeyElements (".checkout-button", clickCheckoutButton);

function clickCheckoutButton (jNode) {
    var clickEvent  = document.createEvent ('MouseEvents');
    clickEvent.initEvent ('click', true, true);
    jNode[0].dispatchEvent (clickEvent);
}
/==UserScript==
//@name(Nike auto buy!!!)脚本
//@包括http://*/*
//@需要http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
//@需要https://gist.github.com/raw/2625891/waitForKeyElements.js
//@grant GM_addStyle
//==/UserScript==
/*-需要@grant指令来解决设计变更
在GM 1.0中引入。它会恢复沙箱。
*/
var okayToClickAddtoCart=false;
//--假设大小是标准标记或类似标记。。。
waitForKeyElements(“.selectBox标签[value='10']”),selectShoeSize);
函数selectShoeSize(jNode){
jNode.prop('selected',true);
okayToClickAddtoCart=true;
}
WaitFork眼线(“.add to cart.nike”按钮),单击AddToCart);
函数clickAddToCart(jNode){
如果(!okayToClickAddtoCart){
返回true;//--暂时不要单击。
}
var clickEvent=document.createEvent('MouseEvents');
clickEvent.initEvent('click',true,true);
jNode[0]。dispatchEvent(clickEvent);
}
WaitForkEyements(“签出按钮”,单击签出按钮);
功能单击检查按钮(jNode){
var clickEvent=document.createEvent('MouseEvents');
clickEvent.initEvent('click',true,true);
jNode[0]。dispatchEvent(clickEvent);
}



(如果目标页面被Nike删除或更改)

我希望快速概述如何使用Greasemonkey/Tampermonkey为这些页面和操作编写脚本,而不仅仅是修改问题的脚本

这些步骤是:

  • 仔细记下您手动执行的操作。特别注意页面javascript添加/更改的元素,以及所需的步骤顺序(如果有)

  • 使用Firebug和/或Firefox的inspector和/或Chrome的开发工具,为您将要读取或操作的所有元素确定CSS/jQuery选择器。使用Firebug尤其容易做到这一点

  • 使用jQuery操作静态HTML。用于处理javascript(AJAX)添加或更改的节点。使用(Tampermonkey也支持,部分由Chrome用户脚本支持)执行任何跨域页面调用,或存储跨域页面集页面加载之间的任何值



  • 具体示例:
  • 例如,OP希望:(a)自动选择鞋码,(b)将鞋添加到购物车,以及(c)单击“结帐”按钮

    这需要等待和/或单击五(5)个页面元素,如下所示:


  • 使用Firebug(或类似工具)我们获得关键节点的HTML结构。例如,“大小”下拉列表中的HTML如下所示:

    <div class="size-quantity">
        <span class="sizeDropdown selectBox-open">
            ...
            <label class="dropdown-label selectBox-label-showing">SIZE</label>
            ...
            <a class="selectBox size-dropdown mediumSelect footwear selectBox-dropdown" ...>
                ...
            </a>
        </span>
    </div>
    
    我们可以将其缩减为:

    div.footwear form.add-to-cart-form span.sizeDropdown a.size-dropdown
    
    对于一个合理的选择器,它很可能经受住琐碎的页面更改,并且不太可能触发不需要的页面/产品

    ~~~~~~~~~~~~~~
    请注意,Firebug还帮助我们了解哪些事件与哪些事件相关,这在确定需要触发哪些事件时至关重要。例如,对于该节点,我看到:

    该链接没有
    href
    ,也没有侦听
    单击事件。在这种情况下,我们必须触发
    mousedown
    (或
    keydown

    ~~~~~~~~~~~~~~
    对其他4个关键节点使用类似的过程,我们获得以下CSS/jQuery选择器:

    节点1:div.shoots form.add-to-cart-form span.sizeDropdown a.size-dropdown
    节点2:ul.selectBox-dropdown-menu li a:contains('10')
    (但这需要额外检查)
    节点3:div.shoots form.add-to-cart-form span.sizeDropdown a.selectBox span.selectBox标签:包含(‘(10)’)
    节点4:div.shoots form.add-to-cart-form div.product-selections div.add-to-cart
    节点5:div.mini-cart div.cart-item-data a.checkout-button:可见
    

  • 最后,我们使用
    waitforkyelments
    将所需事件发送到关键节点,并按照适当的操作顺序进行排序

  • 结果,完成的工作脚本是:

    // ==UserScript==
    // @name     _Nike auto-buy shoes(!!!) script
    // @include  http://store.nike.com/*
    // @include  https://store.nike.com/*
    // @require  http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
    // @require  https://gist.github.com/raw/2625891/waitForKeyElements.js
    // @grant    GM_addStyle
    // ==/UserScript==
    /*- The @grant directive is needed to work around a design change
        introduced in GM 1.0.   It restores the sandbox.
    */
    
    var targetShoeSize  = "10";
    
    //-- STEP 1:    Activate size drop-down.
    waitForKeyElements (
        "div.footwear form.add-to-cart-form span.sizeDropdown a.size-dropdown",
        activateSizeDropdown
    );
    function activateSizeDropdown (jNode) {
        triggerMouseEvent (jNode[0], "mousedown");
    
        //-- Setup step 2.
        waitForKeyElements (
            "ul.selectBox-dropdown-menu li a:contains('" + targetShoeSize + "'):visible",
            selectDesiredShoeSize
        );
    }
    
    //-- STEP 2:    Select desired shoe size.
    function selectDesiredShoeSize (jNode) {
        /*-- Because the selector for this node is vulnerable to false positives,
            we need an additional check here.
        */
        if ($.trim (jNode.text () ) === targetShoeSize) {
            //-- This node needs a triplex event
            triggerMouseEvent (jNode[0], "mouseover");
            triggerMouseEvent (jNode[0], "mousedown");
            triggerMouseEvent (jNode[0], "mouseup");
    
            //-- Setup steps 3 and 4.
            waitForKeyElements (
                "div.footwear form.add-to-cart-form span.sizeDropdown a.selectBox "
                + "span.selectBox-label:contains('(" + targetShoeSize + ")')",
                waitForShoeSizeDisplayAndAddToCart
            );
        }
    }
    
    //-- STEPS 3 and 4: Wait for shoe size display and add to cart.
    function waitForShoeSizeDisplayAndAddToCart (jNode) {
        var addToCartButton = $(
            "div.footwear form.add-to-cart-form div.product-selections div.add-to-cart"
        );
        triggerMouseEvent (addToCartButton[0], "click");
    
        //-- Setup step 5.
        waitForKeyElements (
            "div.mini-cart div.cart-item-data a.checkout-button:visible",
            clickTheCheckoutButton
        );
    }
    
    //-- STEP 5:    Click the checkout button.
    function clickTheCheckoutButton (jNode) {
        triggerMouseEvent (jNode[0], "click");
    
        //-- All done.  The checkout page should load.
    }
    
    function triggerMouseEvent (node, eventType) {
        var clickEvent = document.createEvent('MouseEvents');
        clickEvent.initEvent (eventType, true, true);
        node.dispatchEvent (clickEvent);
    }
    

    .selectBox标签[value='10']
    是一个jQuery选择器。它显然与实际页面的HTML不匹配。禁用脚本,浏览到该页面,从Firefox(Ctrl+S)将该页面保存为“Targetpage.htm”,然后将该文件(
    Targetpage.htm
    )上载到您的问题并链接到粘贴库。然后我们可以帮助您调整jQuery选择器。这是targetpage,这是测试页面(targetpage)。好的,谢谢,我非常感谢。那么,一旦你找到了代码,它会在任何一个Nike sneaker页面上工作,还是只在那一个页面上工作?因为我希望它可以在每个nike.com sneaker页面上运行,而不需要知道预定义的HTML链接。它应该可以在每个鞋子页面上使用相同的基本HTML。另外,请注意,SO不是脚本编写服务。但是我注意到,我没有一个问题可以让初学者解释这种页面的过程。Brock你太棒了,它工作得完美无瑕!再说一次,如果你有贝宝,我很乐意捐赠给你!不客气。如果你愿意,你可以捐款或以我的名义捐款。Adblock guy也是一位慷慨且知识渊博的扩展开发讲师。
    // ==UserScript==
    // @name     _Nike auto-buy shoes(!!!) script
    // @include  http://store.nike.com/*
    // @include  https://store.nike.com/*
    // @require  http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
    // @require  https://gist.github.com/raw/2625891/waitForKeyElements.js
    // @grant    GM_addStyle
    // ==/UserScript==
    /*- The @grant directive is needed to work around a design change
        introduced in GM 1.0.   It restores the sandbox.
    */
    
    var targetShoeSize  = "10";
    
    //-- STEP 1:    Activate size drop-down.
    waitForKeyElements (
        "div.footwear form.add-to-cart-form span.sizeDropdown a.size-dropdown",
        activateSizeDropdown
    );
    function activateSizeDropdown (jNode) {
        triggerMouseEvent (jNode[0], "mousedown");
    
        //-- Setup step 2.
        waitForKeyElements (
            "ul.selectBox-dropdown-menu li a:contains('" + targetShoeSize + "'):visible",
            selectDesiredShoeSize
        );
    }
    
    //-- STEP 2:    Select desired shoe size.
    function selectDesiredShoeSize (jNode) {
        /*-- Because the selector for this node is vulnerable to false positives,
            we need an additional check here.
        */
        if ($.trim (jNode.text () ) === targetShoeSize) {
            //-- This node needs a triplex event
            triggerMouseEvent (jNode[0], "mouseover");
            triggerMouseEvent (jNode[0], "mousedown");
            triggerMouseEvent (jNode[0], "mouseup");
    
            //-- Setup steps 3 and 4.
            waitForKeyElements (
                "div.footwear form.add-to-cart-form span.sizeDropdown a.selectBox "
                + "span.selectBox-label:contains('(" + targetShoeSize + ")')",
                waitForShoeSizeDisplayAndAddToCart
            );
        }
    }
    
    //-- STEPS 3 and 4: Wait for shoe size display and add to cart.
    function waitForShoeSizeDisplayAndAddToCart (jNode) {
        var addToCartButton = $(
            "div.footwear form.add-to-cart-form div.product-selections div.add-to-cart"
        );
        triggerMouseEvent (addToCartButton[0], "click");
    
        //-- Setup step 5.
        waitForKeyElements (
            "div.mini-cart div.cart-item-data a.checkout-button:visible",
            clickTheCheckoutButton
        );
    }
    
    //-- STEP 5:    Click the checkout button.
    function clickTheCheckoutButton (jNode) {
        triggerMouseEvent (jNode[0], "click");
    
        //-- All done.  The checkout page should load.
    }
    
    function triggerMouseEvent (node, eventType) {
        var clickEvent = document.createEvent('MouseEvents');
        clickEvent.initEvent (eventType, true, true);
        node.dispatchEvent (clickEvent);
    }