Reputation: 2627
I'd like to import this javascript package in React
<script src="https://cdn.dwolla.com/1/dwolla.js"></script>
However, there is no NPM package, so I can't import it as such:
import dwolla from 'dwolla'
or
import dwolla from 'https://cdn.dwolla.com/1/dwolla.js'
so whenever I try
dwolla.configure(...)
I get an error saying that dwolla is undefined. How do I solve this?
Upvotes: 115
Views: 159528
Reputation: 11
//when import by npm
import dwolla from 'dwolla';
// You can now use dwolla
directly within this module
console.log(dwolla);
Upvotes: 1
Reputation: 1390
var _loaded = {};
function addScript(url) {
if (!loaded[url]) {
var s = document.createElement('script');
s.src = url;
document.head.appendChild(s);
_loaded[url] = true;
}
}
how to load javascript file from cdn server in a component
Upvotes: 2
Reputation: 841
for typescript developers
const newWindowObject = window as any;
// cast it with any type
let pushNotification = newWindowObject.OneSignal;
// now OneSignal object will be accessible in typescript without error
Upvotes: 7
Reputation: 2306
This question is getting older, but I found a nice way to approach this using the react-helmet
library which I feel is more idiomatic to the way React works. I used it today to solve a problem similar to your Dwolla question:
import React from "react";
import Helmet from "react-helmet";
export class ExampleComponent extends React.Component {
constructor(props) {
super(props);
this.state = {
myExternalLib: null
};
this.handleScriptInject = this.handleScriptInject.bind(this);
}
handleScriptInject({ scriptTags }) {
if (scriptTags) {
const scriptTag = scriptTags[0];
scriptTag.onload = () => {
// I don't really like referencing window.
console.log(`myExternalLib loaded!`, window.myExternalLib);
this.setState({
myExternalLib: window.myExternalLib
});
};
}
}
render() {
return (<div>
{/* Load the myExternalLib.js library. */}
<Helmet
script={[{ src: "https://someexternaldomain.com/myExternalLib.js" }]}
// Helmet doesn't support `onload` in script objects so we have to hack in our own
onChangeClientState={(newState, addedTags) => this.handleScriptInject(addedTags)}
/>
<div>
{this.state.myExternalLib !== null
? "We can display any UI/whatever depending on myExternalLib without worrying about null references and race conditions."
: "myExternalLib is loading..."}
</div>
</div>);
}
}
The use of this.state
means that React will automatically be watching the value of myExternalLib and update the DOM appropriately.
Credit: https://github.com/nfl/react-helmet/issues/146#issuecomment-271552211
Upvotes: 9
Reputation: 343
Add the script tag in your index.html and if you are using Webpack, you can use this webpack plugin https://webpack.js.org/plugins/provide-plugin/
Upvotes: 0
Reputation: 2627
Go to the index.html file and import the script
<script src="https://cdn.dwolla.com/1/dwolla.js"></script>
Then, in the file where dwolla is being imported, set it to a variable
const dwolla = window.dwolla;
Upvotes: 147
Reputation: 3198
You can't require or import modules from a URL.
What you can do is make an HTTP request to get the script content & execute it, as in the answer for how to require from URL in Node.js
But this would be a bad solution since your code compilation would depend on an external HTTP call.
A good solution would be to download the file into your codebase and import it from there. You could commit the file to git if the file doesn't change much & are allowed to do it. Otherwise, a build step could download the file.
Upvotes: 4