String.prototype.trim polyfill for 140byt.es

annotated.js

function(){
  /* Rules:                      // make sure
  (1) anonymous function         // to annotate
  (2) optionally self-executing  // your code
  (3) <140 bytes                 // so everyone
  (4) no global vars             // can learn
  (5) MIT license                // from it!
  (6) good luck!
*/}

index.js

function(){/*Rules: (1) anonymous function (2) optionally self-executing (3) <140 bytes (4) no global vars (5) MIT license (6) good luck!*/}

package.json

{
  "name": "sample",
  "keywords": [ "sample", "original" ]
}

The whitespace included in the character class \s is inconsistent across browsers. Instead a manual check of the required whitespace - is - best.
Also browsers like Chrome have a bug where String.prototype.trim = ''.trim will cause String#trim to become enumerable.

Fixing the enumerable issue. I'm not sure yet if I can tackle making it any more robust as the character class alone to resolve the whitespace issue looks to be over 140 characters. I will research.

subzey commented in another gist of mine that the following regex might work: ^[\s\uFEFF]+|[\s\uFEFF]+$. I will use it unless you think there is something non-compliant with it.

Did you happen to find any issues with the regex you implemented?

return this.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');