在2016年的https://github.com/jquery/jquery/issues/2871中有一个关于这个主题的长线程
简而言之：

• jQuery无法添加对被动侦听器的支持。
• 预计这将在jQuery 4中添加（4年，仍在3.5.x中）
• 建议的修复方法是在jQuery加载后立即添加以下代码：

jQuery.event.special.touchstart = {
        setup: function( _, ns, handle ){
            this.addEventListener("touchstart", handle, { passive: true });
        }
    };

2021年更新：在jquery后面添加以下代码。这将修复它并删除Pagespeed警告

jQuery.event.special.touchstart = {
    setup: function( _, ns, handle ) {
        this.addEventListener("touchstart", handle, { passive: !ns.includes("noPreventDefault") });
    }
};
jQuery.event.special.touchmove = {
    setup: function( _, ns, handle ) {
        this.addEventListener("touchmove", handle, { passive: !ns.includes("noPreventDefault") });
    }
};
jQuery.event.special.wheel = {
    setup: function( _, ns, handle ){
        this.addEventListener("wheel", handle, { passive: true });
    }
};
jQuery.event.special.mousewheel = {
    setup: function( _, ns, handle ){
        this.addEventListener("mousewheel", handle, { passive: true });
    }
};

这已经成功了！

// Passive event listeners
jQuery.event.special.touchstart = {
    setup: function( _, ns, handle ) {
        this.addEventListener("touchstart", handle, { passive: !ns.includes("noPreventDefault") });
    }
};
jQuery.event.special.touchmove = {
    setup: function( _, ns, handle ) {
        this.addEventListener("touchmove", handle, { passive: !ns.includes("noPreventDefault") });
    }
};

如何使事件侦听器被动以提高滚动性能。要解决此问题-：
1.转到主题核心文件。
1.查找header.php，或者您可以使用插件将代码插入到标头中。
1.复制代码并粘贴到header.php文件中。
1.如果你打算在header.php中使用这些代码，我强烈建议你使用PHP的开始和结束标记。

<script>!function(e){"function"==typeof define&&define.amd?define(e):e()}(function(){var e,t=["scroll","wheel","touchstart","touchmove","touchenter","touchend","touchleave","mouseout","mouseleave","mouseup","mousedown","mousemove","mouseenter","mousewheel","mouseover"];if(function(){var e=!1;try{var t=Object.defineProperty({},"passive",{get:function(){e=!0}});window.addEventListener("test",null,t),window.removeEventListener("test",null,t)}catch(e){}return e}()){var n=EventTarget.prototype.addEventListener;e=n,EventTarget.prototype.addEventListener=function(n,o,r){var i,s="object"==typeof r&&null!==r,u=s?r.capture:r;(r=s?function(e){var t=Object.getOwnPropertyDescriptor(e,"passive");return t&&!0!==t.writable&&void 0===t.set?Object.assign({},e):e}(r):{}).passive=void 0!==(i=r.passive)?i:-1!==t.indexOf(n)&&!0,r.capture=void 0!==u&&u,e.call(this,n,o,r)},EventTarget.prototype.addEventListener._original=e}});</script>