How could I just extract the text androiddev from the following string in JavaScript?

/

I tried trimming it from the back, but I'm still stuck with the front part.

Been stuck at this for a few hours now, would really appreciate any help!

How could I just extract the text androiddev from the following string in JavaScript?

https://www.reddit./r/androiddev/ments/49878b/droidcon_sf_is_11_days_away/

I tried trimming it from the back, but I'm still stuck with the front part.

Been stuck at this for a few hours now, would really appreciate any help!

• javascript
• html
• url
• split

• 1 String.prototype.trim() is available in modern browsers. – Pointy Commented Mar 6, 2016 at 22:06
• @Pointy but is that not only for when there's whitespace on both sides? – Dark Knight Commented Mar 6, 2016 at 22:07
• var value = 'yourstring'.split('/')[4] – Dmitriy Commented Mar 6, 2016 at 22:08
• It trims whitespace off of both sides. If there's no whitespace on one or both sides, nothing happens to that side. edit oh wait I see. You're trimming non-space stuff. Sorry, never mind. – Pointy Commented Mar 6, 2016 at 22:09
• The title of the question is misleading: PO actually asks how to get the Sub-string from the string (should it be indeed about Trimming text, then @Pointy gave exact answer). Please correct the question. Thanks and regards, – Alexander Bell Commented Mar 6, 2016 at 22:12

4 Answers 4

var str = "https://www.reddit./r/androiddev/ments/49878b/droidcon_sf_is_11_days_away/"
var name = str.split('/')[4]
console.log(name);// androiddev

Easy and fast :)

var value = 'yourstring'.split('/')[4]

Sure you can just split the whole URL with /, but I generally find it safer to break the URL into known parts, then extract information from those.

Here's a sort of sneaky way to do URL parsing in the browser

function parseUrl(url) {
  var elem = document.createElement('a');
  elem.href = url;
  return {
    protocol: elem.protocol,
    host:     elem.host,
    hostname: elem.hostname,
    port:     elem.port,
    pathname: elem.pathname,
    hash:     elem.hash
  };
}

Then you can use it like this

var url = "https://www.reddit./r/androiddev/ments/49878b/droidcon_sf_is_11_days_away/"
parseUrl(url).pathname.split('/')[2]; // "androiddev"

Use the substr String function:

 var s = "https://www.reddit./r/androiddev/ments/49878b/droidcon_sf_is_11_days_away/";
 var ss = s.substr(25, 10);
 alert(ss);

Where the first argument is what index position to begin extracting at and the second is how many chars. to extract.