If you are not familiar with a slug and you hear a web developer refer to a slug, this article will help you clarify what they mean.
What you might think it means
Typically when you think of a slug, you probably imagine those creepy crawling snail-like slugs.
That's not what the developer means when they refer to a slug.
Or, perhaps your mind goes back to your child-hood video game days and it reminds you of that awesome game Metal Slug
Although Metal Slug is a badass game, this is not what the developer means either.
What it actually means
When a developer refers to the term slug they are referring to a URL slug.
A URL slug is a URL friendly string.
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URL strings are supposed to contain only alpha numeric characters and other characters are reserved or not allowed in a URL. So, when a string is converted to a slug it will typically be stripped of all these unsafe characters.
Often times a slug will be derived from a title. As an example, a webpage titled: How to Make Toast?, might have a slug like: how-to-make-toast. So, the full URL would be something like site.com/how-to-make-toast
Take a look at a few of these examples:
title = 'I Love Waffles';
title_slug = 'i-love-waffles';
title = 'How Do You Make French Toast?';
title_slug = 'how-do-you-make-french-toast';
title = 'Hamburger & Fries';
title_slug = 'hamburger-and-fries';
Pretty straightforward, right? It's as simple as that. When a web developer refers to a slug they are referring to a URL friendly string.
Now, when an entomologist (a person who studies insects) refers to a slug they are probably not referring to a URL friendly string.
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