Is there any way that I can set a user agent by using HTML or JavaScript?

Question

So I am working on a project that access a discord bot using a token in web browsers But recently, discord has changed their policy of bot requests, that make us have to manually change the user agent setting in the developer tools. Now I am wondering that is there any way that I can override the user agent setting of browser in JavaScript or HTML?

I have tried the method at here
For instance, after pasting the code:

setUserAgent(window, "BDP (http://example.com), v0.0.1)");

And it seems that it no loger work so I tried again with this
For instance:

Object.defineProperty(navigator, 'userAgent', {
    get: function () { return 'BDP (http://example.com), v0.0.1)'; }
});

But none of the method above helps me. Is there any way that I can override the user agent of browser?

Thanks!

Does this answer your question? How to change browser User-Agent Header with javaScript? — Ivar
– Ivar, Commented Jan 18, 2022 at 11:33
@Ivar I tried XMLHttpRequest.setRequestHeader('userAgent', customUserAgent) and its a no-go - or am I using it the wrong way? If so, can u give an example for that? Thanks! — YueYue
– YueYue, Commented Jan 18, 2022 at 11:43
@YueYue What browser are you using? Did you check the note on this page? — Ivar
– Ivar, Commented Jan 18, 2022 at 11:55
After reading the MDN page @Ivar has linked, it looks like you could set User-Agent header with XHR/Fetch requests, notice the spelling. There's also a mention of a Chromium bug, and it's still listed as Forbidden header name at its documentation page, though. — Teemu
– Teemu, Commented Jan 18, 2022 at 12:05

Satvik Rajnarayanan · Accepted Answer · 2022-01-18 12:04:48Z

-4

Please try using this code.. navigator.useragent returns the browser name..

if((navigator.userAgent.indexOf("BrowserName"))
{
    //write some code
}

answered Jan 18, 2022 at 12:04

Satvik Rajnarayanan

11 bronze badge

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1 Comment

Quentin Over a year ago

You seem to have confused "set" with "read"

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