Parsing url using url-parse

Question

I am using library to parse urls on my page:

import * as urlParse from 'url-parse';

const parseUrl = url => {
try {
 return urlParse(url);
} catch (e) {
 return null;
 }
};

The issue is when the url 'www.stackoverflow.com' is passed to the function, parseUrl returns http:localhost\www.stackoverflow.com

should I use to obtain the value http://www.stackoverflow.com?

it is acceptable value in our backend and so many other systems. please check this: regextester.com/94502 — Afflatus
– Afflatus, Commented Oct 9, 2018 at 18:01
Why are you calling parseUrl recursively? This is an unending recursion — dRoyson
– dRoyson, Commented Oct 9, 2018 at 18:03
@Afflatus The library doesn't care what's acceptable in your backend or matched by some random pattern somebody posted online. It needs to be a string that doesn't cause an error when you pass it to URL(), that's how the library works. — user5734311
– user5734311, Commented Oct 9, 2018 at 18:05
you are right I fixed the name of the alias. still doesn't work — Afflatus
– Afflatus, Commented Oct 9, 2018 at 18:05

Eugene Tsakh · Accepted Answer · 2018-10-09 18:11:10Z

1

You don't really need any external lib for this:

const parser = document.createElement('a');
parser.href = '//www.stackoverflow.com';
console.log(`${parser.protocol}//${parser.hostname}`); // 'https://stackoverflow.com'

edited Oct 9, 2018 at 18:11

answered Oct 9, 2018 at 18:06

Eugene Tsakh

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4 Comments

Eugene Tsakh Over a year ago

@ChrisG I don't see any result there. Try running it in console

Tyler Roper Over a year ago

@EugeneTsakh As Chris G states, you've made a relative link, therefore that code will just return the protocol and hostname of whatever page you run it on. If you change your href to www.google.com and run it in Stack Overflow's console, it will still log https://stackoverflow.com.

Eugene Tsakh Over a year ago

I see. Than use parser.href = '//www.stackoverflow.com';

Tyler Roper Over a year ago

@ChrisG Do not edit an answer/code to highlight its shortcomings, as edits should be reserved for positive change and/or clean-up rather than making an answer objectively worse. In this case, a comment is sufficient.

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