JavaScript Slug Generator

slug.js

// Generates a URL-friendly "slug" from a provided string.
// For example: "This Is Great!!!" transforms into "this-is-great"
function generateSlug (value) {
  // 1) convert to lowercase
  // 2) remove dashes and pluses
  // 3) replace spaces with dashes
  // 4) remove everything but alphanumeric characters and dashes
  return value.toLowerCase().replace(/-+/g, '').replace(/\s+/g, '-').replace(/[^a-z0-9-]/g, '');
};

take a look to http://pid.github.io/speakingurl/ slugify with a lot of options ;-)

Just a heads-up: You should probably swap steps 3 and 4, otherwise you can end up with more consecutive dashes again after stripping some characters. Step 2 is probably superfluous given the steps that follow.

thanks @pid