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I am working on ReactJs and the server direct to a domain name with id on it. So I want to ask how can I get current domain name with ReactJS?

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This isn't React specific.

Just look at window.location:

alert(window.location.hostname)

(Yes, the above snippet will say stacksnippets.net due to security reasons.)

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Thanks, but I got this error: ReferenceError: window is not defined. It is jsdom jsdom-global library right?
window is innately available in browsers, you don't need a library. Are you running this in JSDom?
I found the answer. I use context.req.url of getInitialProps ReactJS, so I dont have to use window.
There is no "context.req.url" in raw ReactJS, so you left essential detail out of your original question. Glad you found the answer though.
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Use window.location inside componentDidMount React Lifecycle. If you want to use inside DOM use state to store value.

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I found the answer. I use context.req.url of getInitialProps ReactJS, so I dont have to use window.
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Use window.location.hostname - note this will not work in JSDom, only in browsers.

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