javascript - How to validate url?

Question

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

I want to validate urls. It should accept:

http://google.com

http://www.google.com

www.google.com

google.com

But it is not supporting google.com .

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1 Answer

深蓝 · Answer 1 · 2021-10-23T21:27:38+0000

Simply prepend http:// if it's not there and then test.

if (inputURL.substring(0,7) != 'http://' && inputURL.substring(0,8) != 'https://') {
    inputURL = 'http://' + inputURL;
}

No large libraries required or anything, just a few lines of code.