One question to JavaScript gurus

Question

Hello expert,

please check this file

http://www.findmyshift.com/scripts/minified/4.1.1518127339_-603332839.js?20100812231650

The script is written in an interesting method,Could you please explain how this is done ?

Anyone can explain how a simple function can write in this method ?

Thank you

Answer 1

This is a process called minificiation. I believe the specific script you mention is using Packer, but there are tons of services that do this (the YUI compressor is one notable example).

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Edit

For some reason, you don't believe this is minification because of the piping at the end. Try using Packer's example code:

// sample code

var input, output;

// notice the semi-colon at the END of function declarations

onload = function() {
  input = document.getElementById("input");
  output = document.getElementById("output");
  clearAll(true);
};

function packScript() {
  output.value = pack(input.value);
};

function clearAll(focus) {
  output.value = input.value = "";
  // the "if" statement is NOT terminated with a semi-colon
  if (focus) {
    input.focus();
  }
};

Paste it into Packer, check Base62 encode. It produces a similar result.

Answer 2

It's pretty simple, just copy & paste your javascript in here: http://dean.edwards.name/packer/.