Dynamic Facebook Open Graph tags possible?

I'm dynamically changing my <meta property="og:image" content="#"> and <meta property="og:title" content="#"> tags using jQuery (below). When I view the code via 'inspect' in Chrome, the tags have successfully been changed.

HTML:

<meta property="og:title" content="#">
<meta property="og:image" content="#">

jQuery:

$("meta[property='og:title']").attr("content", data.name);
$("meta[property='og:image']").attr("content", data.thumbnail.url);

But the Facebook debugger tool is still showing content="#" for each. I'm assuming this is because Facebook reads the source code, before Javascript has a chance to replace the content.

Is there a way around this?

Thank you.

Facebook does not parse JavaScript at all, you can´t use dynamic Open Graph tags. It does not really make sense to change them on the fly anyway.

You can only change the OG tags dynamically on the server - obviously. For example: https://yourdomain.com/dynamicogtags.php?title=xxx&description=xxx

<meta property="og:title" content="<?php echo $_GET['title'];?>">

Not sure if that´s what you want to do though, the URL looks pretty ugly that way. Rewrite would be nice, of course.

You also may want to try something like prerender.io, but i am not sure if it will handle dynamic og tags.

Try this it worked for me.

<?php

$params = array();
if(count($_GET) > 0) {
    $params = $_GET;
} else {
    $params = $_POST;
}
// defaults
if($params['type'] == "") $params['type'] = "restaurant";
if($params['locale'] == "") $params['locale'] = "en_US";
if($params['title'] == "") $params['title'] = "default title";
if($params['image'] == "") $params['image'] = "thumb";
if($params['description'] == "") $params['description'] = "default description";

?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
    <head prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb# MY_APP_NAME_SPACE: http://ogp.me/ns/fb/MY_APP_NAME_SPACE#">
        <title></title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>

        <!-- Open Graph meta tags -->
        <meta property="fb:app_id" content="MY_APP_ID" />
        <meta property="og:site_name" content="meta site name"/>
        <meta property="og:url" content="http://URL/index.php?type=<?php echo $params['type']; ?>&locale=<?php echo $params['locale']; ?>&title=<?php echo $params['title']; ?>&image=<?php echo $params['image']; ?>&description=<?php echo $params['description']; ?>"/>
        <meta property="og:type" content="MY_APP_NAME_SPACE:<?php echo $params['type']; ?>"/>
        <meta property="og:locale" content="<?php echo $params['locale']; ?>"/>
        <meta property="og:title" content="<?php echo $params['title']; ?>"/>
        <meta property="og:image" content="http://URL/img/<?php echo $params['image']; ?>.png"/>
        <meta property="og:description" content="<?php echo $params['description']; ?>"/>

    </head>
</html>

As said previously, Facebook doesn't parse JavaScript at all.

One way of doing it (the way I do it) is to use a prerendering service like prerender.io to prerender your pages and redirect requests coming from web crawlers to that prerendering server based on the user-agent (you can easily find how to do that with your Nginx/Apache server on google).

Prerendering services produce an HTML/CSS render of your page, but they wait until the page is fully loaded and the JavaScript is executed before doing so. That way, Facebook gets a render of your website where the JavaScript has been executed and the OpenGraph tags are set correctly!

Prerender is open-source so you can run your own prerender server for free!

来源：https://stackoverflow.com/questions/34281862/dynamic-facebook-open-graph-tags-possible

标签

jquery

html

facebook-graph-api

facebook-opengraph