Facebook聊天插件“杀死”页面速度至33

Question

我已经通过从Facebook.com生成的代码添加了Facebook聊天插件

<!-- Load Facebook SDK for JavaScript -->
<div id="fb-root"></div>
<script>(function(d, s, id) {
  var js, fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) return;
  js = d.createElement(s); js.id = id;
  js.src = 'https://connect.facebook.net/en_US/sdk/xfbml.customerchat.js';
  fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>

<!-- Your customer chat code -->
<div class="fb-customerchat"
  attribution=setup_tool
  page_id="124030157608968">
</div>`

然而我在Google Chrome中运行了Pagespeed测试，结果很糟糕。有什么建议解决这个问题吗？非常感谢！

- Bocho Todorov

---

对于这个问题，你能做的事情很少，因为这些都是由插件加载的资源，而不在你的控制范围内。 - misorude

Answer 1

有同样的问题。无论您是否以异步方式初始化它，它都会显著降低网站的页面速度指数！

为了完全避开此问题，我采用了以下方法：

我在页面右下角放置了一个假的 Messenger 按钮：

<svg id="fb-messanger-fake-button" width="60px" height="60px" viewBox="0 0 60 60" cursor="pointer">
    <g stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
        <g>
        <circle fill="#00B2FF" cx="30" cy="30" r="30"></circle><svg x="10" y="10">
            <g transform="translate(0.000000, -10.000000)" fill="#FFFFFF">
            <g id="logo" transform="translate(0.000000, 10.000000)">
                <path
                d="M20,0 C31.2666,0 40,8.2528 40,19.4 C40,30.5472 31.2666,38.8 20,38.8 C17.9763,38.8 16.0348,38.5327 14.2106,38.0311 C13.856,37.9335 13.4789,37.9612 13.1424,38.1098 L9.1727,39.8621 C8.1343,40.3205 6.9621,39.5819 6.9273,38.4474 L6.8184,34.8894 C6.805,34.4513 6.6078,34.0414 6.2811,33.7492 C2.3896,30.2691 0,25.2307 0,19.4 C0,8.2528 8.7334,0 20,0 Z M7.99009,25.07344 C7.42629,25.96794 8.52579,26.97594 9.36809,26.33674 L15.67879,21.54734 C16.10569,21.22334 16.69559,21.22164 17.12429,21.54314 L21.79709,25.04774 C23.19919,26.09944 25.20039,25.73014 26.13499,24.24744 L32.00999,14.92654 C32.57369,14.03204 31.47419,13.02404 30.63189,13.66324 L24.32119,18.45264 C23.89429,18.77664 23.30439,18.77834 22.87569,18.45674 L18.20299,14.95224 C16.80079,13.90064 14.79959,14.26984 13.86509,15.75264 L7.99009,25.07344 Z">
                </path>
            </g>
            </g>
        </svg>
        </g>
    </g>
</svg>

我使用CSS将其定位在右下角，恰好与您的配置所显示的真正的信使按钮重合：

#fb-messanger-fake-button {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 100;
    transition: opacity 0.3s;
}

使用 jQuery（在我这里）或纯 JavaScript（如果你想），实现逻辑，当用户点击我们的假 Messanger 按钮时，注入 Facebook SDK 并启动 Messanger 插件：

// Facebook SDK for JavaScript inject code
function injectFbSdkAsync(d, s, id) {
    var js, fjs = d.getElementsByTagName(s)[0];
    if (d.getElementById(id)) return;
    js = d.createElement(s); js.id = id;
    js.src = 'https://connect.facebook.net/en_US/sdk/xfbml.customerchat.js';
    fjs.parentNode.insertBefore(js, fjs);
};

$(function() {
    const $fbMessangerFakeButton = $('#fb-messanger-fake-button');
    $fbMessangerFakeButton.on('click', function(){
        // Fades out the fake button a bit, to indicate "loading"
        $fbMessangerFakeButton.css({ opacity: 0.4 });
        // Inject the Facebook SDK in async manner:
        injectFbSdkAsync(document, 'script', 'facebook-jssdk');

        // Callback on Facebook SDK init, that fires up the Messanger plugin
        window.fbAsyncInit = function() {
            FB.init({ xfbml: true, version: 'v8.0' });

            // Callback when Facebook SDK finish up with rendering
            FB.Event.subscribe('xfbml.render', function(){
                // Immediately toggle opening the Facebook Messanger,
                // as if the user clicked the real Messanger button.
                FB.CustomerChat.show(true);

                // Hide the fake button, so that only the real one remains!
                $fbMessangerFakeButton.css({ display: 'none' });
            });
        };
    });
});

就是这样！您的页面速度指数已恢复正常。

- Kaloyan Kosev

Answer 2

我非常喜欢Kaloyan的方法。谢谢！这对于网站性能来说非常有用，变得更加明显。

我已经改进了带有小微调器的虚拟按钮，作为加载指示器-只是为了更好的用户体验。

此外，我用标签包装了SVG（我相信这样做可以更好地实现a11y），并且不再使用jQuery。

Messenger虚拟按钮

完整代码，在页面末尾挂钩（可能在页脚）。

<button id="fb-messenger-fake-button">
<svg xmlns="http://www.w3.org/2000/svg" width="60" height="60" viewBox="0 0 1024 1024" aria-hidden="true">
    <circle fill="#00B2FF" style="fill: var(--msgr-color, #00B2FF)" cx="512" cy="512" r="512"/>
    <g id="spinner" fill="#fff"><circle cx="512" cy="239" r="47"/><circle cx="375" cy="275" r="47" fill-opacity="0.9"/><circle cx="275" cy="375" r="47" fill-opacity="0.8"/><circle cx="239" cy="512" r="47" fill-opacity="0.7"/><circle cx="275" cy="649" r="47" fill-opacity="0.6"/><circle cx="375" cy="749" r="47" fill-opacity="0.5"/><circle cx="512" cy="785" r="47" fill-opacity="0.4"/><circle cx="649" cy="749" r="47" fill-opacity="0.3"/><circle cx="749" cy="649" r="47" fill-opacity="0.2"/><circle cx="785" cy="512" r="47" fill-opacity="0.1"/></g>
    <path id="logo" fill="#fff" d="M512 171c192 0 341 141 341 331S704 833 512 833c-35 0-68-5-99-13-6-2-12-1-18 1l-68 30c-17 8-37-5-38-24l-2-61c0-7-4-14-9-19a324 324 0 01-107-245c0-190 149-331 341-331zM307 599c-10 15 9 32 24 21l107-82c8-5 18-5 25 0l80 60c24 18 58 12 74-14l100-159c10-15-9-32-24-21l-107 82c-8 5-18 5-25 0l-80-60a51 51 0 00-74 13L307 599z"/>
</svg><span class="screen-reader-text">Enable chat via Messenger</span>
</button>

<!-- Messenger Chat plugin Code -->
<div id="fb-root"></div>
<!-- Your Chat Plugin code -->
<!-- Put the ID of your page on Facebook, at least -->
<div class="fb-customerchat"
 attribution=setup_tool
 page_id="000000000000000"
 theme_color="#00B2FF"
 logged_in_greeting="Hi! How can I help you?"
 logged_out_greeting="Hi! How can I help you?">
</div>

<script>
// Facebook SDK for JavaScript inject code
// Change language part to yours, e.g.: en_US > pl_PL
function injectFbSdkAsync(d, s, id) {
  var js,
    fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) return;
  js = d.createElement(s);
  js.id = id;
  js.src = "https://connect.facebook.net/en_US/sdk/xfbml.customerchat.js";
  fjs.parentNode.insertBefore(js, fjs);
}

var fbMessengerFakeButton = document.getElementById('fb-messenger-fake-button');
fbMessengerFakeButton.addEventListener('click', function() {
    
  // Once #fb-messenger-fake-button is clicked triggers animated spinner inside it 
  // See CSS, and SVG structure inside the button
  this.classList.add('active');
    
  // Inject the Facebook SDK in async manner:
  injectFbSdkAsync(document, "script", "facebook-jssdk");

  // Callback on Facebook SDK init, that fires up the Messenger plugin
  window.fbAsyncInit = function () {
    FB.init({ xfbml: true, version: "v10.0" });

    // Callback when Facebook SDK finish up with rendering
    FB.Event.subscribe("xfbml.render", function () {
      // Opening the Facebook Messenger
      FB.CustomerChat.show(true);
            
      // Hide the fake button, so that only the real one remains!
      fbMessengerFakeButton.style.display = 'none';
    });
  };
});
</script>

CSS

#fb-messenger-fake-button {
    position: fixed;
    z-index: 100;
    bottom: 24px;
    right: 24px;
    padding: 0 !important;
    border-radius: 50%;
    /* you may use a color of your theme */
    --msgr-color: transparent;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: all 0.3s;
}
#fb-messenger-fake-button svg {
    display: block;
}
#fb-messenger-fake-button.active #logo {
    opacity: 0;
}
#fb-messenger-fake-button.active #spinner {
    animation: spin 3s linear infinite;
    transform-origin: center;
}
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

如何在Facebook上设置Messenger聊天

前往你的Facebook页面： 设置 → 消息 → 将Messenger添加到你的网站 → 开始使用

在那里，最重要的是你需要输入你的网站域名。

- Rafiozoo

Answer 3

将整个代码放在源代码的底部

将 https://connect.facebook.net/en_US/sdk/xfbml.customerchat.js 保存在本地，以延迟方式从本地实现。

- Evgeniy

---

请问您能详细说明一下您所说的“从那里实现”是什么意思吗？- 我理解为将脚本复制到本地，那么在“js.src=”中应该放置什么？ - chenop

你可以将文件 https://connect.facebook.net/en_US/sdk/xfbml.customerchat.js 下载到本地。然后在代码片段中将其 URL 更改为 https://your-domain.com/xfbml.customerchat.js 或者你保存它的位置。 - Evgeniy

我尝试过这个，但它并没有显著提高页面速度。页面速度减慢的主要原因大多是由PHP文件和由该js代码触发的大量js文件包造成的，而不是js本身的大小。此外，看起来谷歌的页面洞察忽略了defer和async，因为它们对我的页面评分没有任何改变。 - Terry Windwalker