React JS loading FB share - facebook

Question

I'm trying to add a facebook share to my react application. There is a lot of detail on Stackoverflow around adding FB.XFBML.parse()
How ever i'm a lint error "FB is not defined". What is the best way to load FB?
edit
window.fbAsyncInit function added.
"use strict";
var React = require('react');
var Router = require('react-router');
var Link = Router.Link;
var ThanksPage = React.createClass({
componentDidMount: function() {
(function (d, s, id) {
const fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) {
return;
}
const js = d.createElement(s); js.id = id;
js.async = true;
js.src = '//connect.facebook.net/fr_CA/sdk.js';
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
window.fbAsyncInit = function() {
FB.XFBML.parse();
};
},
render: function() {
return (
);
}
});
module.exports = ThanksPage;

Answer 1

You can only use FB after FB.init:
componentDidMount() {
window.fbAsyncInit = function() {
//SDK loaded, initialize it
FB.init({
appId : 'your-app-id',
xfbml : true,
version : 'v2.6'
});
//JS SDK initialized, now you can use it
FB.XFBML.parse();
};
//load the JavaScript SDK
(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 = "//connect.facebook.net/en_US/sdk.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
}
Also, make sure to use this with a server (public or localhost), don´t just open the html file in your Browser. You should also consider putting the Facebook stuff in a separate file, so you can use it in future projects. But first, make sure it works and make sure you understand what´s happening.
Keep in mind that you may need to use FB.XFBML.parse in componentDidUpdate too. You have to make sure the JS SDK is loaded already for that. componentDidMount will only get called once, and if you go to another route and back to this component, it will be cached and you need to parse Social Plugins again.
More information about the JS SDK: http://www.devils-heaven.com/facebook-javascript-sdk-login/
You can get rid of the linting error by using /*global FB*/ at the head of your files, or (much better) by defining FB in the .eslintrc file (if using ESLint):
"globals": {
"FB": true
}

Answer 2

You are trying to execute
FB.init();
FB.XFBML.parse();
When the SDK is not even loaded, so, of course, you will get the undefined reference error.
You are missing the callback
window.fbAsyncInit = function() {
// Example: Standard initialization code:
FB.init({
appId : '{your-app-id}',
status : true,
xfbml : true,
version : 'v2.4' // or v2.0, v2.1, v2.2, v2.3
});
FB.XFBML.parse();
};
This code loads the SDK asynchronously so it does not block loading
other elements of your page. This is particularly important to ensure
fast page loads for users and SEO robots.
The URLs in the above code are protocol relative. This lets the
browser to load the SDK over the same protocol (HTTP or HTTPS) as the
containing page, which will prevent "Insecure Content" warnings.
The function assigned to window.fbAsyncInit is run as soon as the SDK
is loaded. Any code that you want to run after the SDK is loaded
should be placed within this function and after the call to FB.init.
For example, this is where you would test the logged in status of the
user or subscribe to any Facebook events in which your application is
interested.
Furthermore, you should set the callback before loading the SDK
window.fbAsyncInit = function() {
// Example: Standard initialization code:
FB.init({
appId : '{your-app-id}',
status : true,
xfbml : true,
version : 'v2.4' // or v2.0, v2.1, v2.2, v2.3
});
FB.XFBML.parse();
};
(function (d, s, id) {
const fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) {
return;
}
const js = d.createElement(s); js.id = id;
js.async = true;
js.src = '//connect.facebook.net/fr_CA/sdk.js';
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));

Answer 3

If you want to add any social share buttons to your react pages then you can try out npm module react-share which is very easy compared to native APIs by FB, Twitter etc.
Sample react-share code snippet at https://samvikshana.weebly.com/blog/react-share-social-share-widgets