Pen Settings

HTML

About HTML Preprocessors

HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

Learn more · Versions

Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

!
Insecure Resource

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

Learn more · Versions

CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

Powered by Algolia
About External Resources

You can apply CSS to your Pen from any stylesheet on the web. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself.

You can also link to another Pen here (use the .css URL Extension) and we'll pull the CSS from that Pen and include it. If it's using a matching preprocessor, use the appropriate URL Extension and we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

Learn more

+ add another resource

JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

Learn more · Versions

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

Powered by Algolia
About External Resources

You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

Learn more

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Powered by Algolia
About Packages

Using packages here is powered by esm.sh, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ESM usage.

All packages are different, so refer to their docs for how they work.

If you're using React / ReactDOM, make sure to turn on Babel for the JSX processing.

Behavior

Auto Save

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML 

              
                <textarea name='tags' placeholder='Movie names'>
    [{"value":"The Good, the Bad and the Ugly"}, {"value":"The Matrix"}]
</textarea>
!

CSS 

              
                .tagify{    
  width: 100%;
  max-width: 700px;
}
!

JS 

              
                var whitelist = ["The Shawshank Redemption", "The Godfather", "The Godfather: Part II", "The Dark Knight", "12 Angry Men", "Schindler's List", "Pulp Fiction", "The Lord of the Rings: The Return of the King", "The Good, the Bad and the Ugly", "Fight Club", "The Lord of the Rings: The Fellowship of the Ring", "Star Wars: Episode V - The Empire Strikes Back", "Forrest Gump", "Inception", "The Lord of the Rings: The Two Towers", "One Flew Over the Cuckoo's Nest", "Goodfellas", "The Matrix", "Seven Samurai", "Star Wars: Episode IV - A New Hope", "City of God", "Se7en", "The Silence of the Lambs", "It's a Wonderful Life", "The Usual Suspects", "Life Is Beautiful", "Léon: The Professional", "Spirited Away", "Saving Private Ryan", "La La Land", "Once Upon a Time in the West", "American History X", "Interstellar", "Casablanca", "Psycho", "City Lights", "The Green Mile", "Raiders of the Lost Ark", "The Intouchables", "Modern Times", "Rear Window", "The Pianist", "The Departed", "Terminator 2: Judgment Day", "Back to the Future", "Whiplash", "Gladiator", "Memento", "Apocalypse Now", "The Prestige", "The Lion King", "Alien", "Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb", "Sunset Boulevard", "The Great Dictator", "Cinema Paradiso", "The Lives of Others", "Paths of Glory", "Grave of the Fireflies", "Django Unchained", "The Shining", "WALL·E", "American Beauty", "The Dark Knight Rises", "Princess Mononoke", "Aliens", "Oldboy", "Once Upon a Time in America", "Citizen Kane", "Das Boot", "Witness for the Prosecution", "North by Northwest", "Vertigo", "Star Wars: Episode VI - Return of the Jedi", "Reservoir Dogs", "M", "Braveheart", "Amélie", "Requiem for a Dream", "A Clockwork Orange", "Taxi Driver", "Lawrence of Arabia", "Like Stars on Earth", "Double Indemnity", "To Kill a Mockingbird", "Eternal Sunshine of the Spotless Mind", "Toy Story 3", "Amadeus", "My Father and My Son", "Full Metal Jacket", "The Sting", "2001: A Space Odyssey", "Singin' in the Rain", "Bicycle Thieves", "Toy Story", "Dangal", "The Kid", "Inglourious Basterds", "Snatch", "Monty Python and the Holy Grail", "Hacksaw Ridge", "3 Idiots", "L.A. Confidential", "For a Few Dollars More", "Scarface", "Rashomon", "The Apartment", "The Hunt", "Good Will Hunting", "Indiana Jones and the Last Crusade", "A Separation", "Metropolis", "Yojimbo", "All About Eve", "Batman Begins", "Up", "Some Like It Hot", "The Treasure of the Sierra Madre", "Unforgiven", "Downfall", "Raging Bull", "The Third Man", "Die Hard", "Children of Heaven", "The Great Escape", "Heat", "Chinatown", "Inside Out", "Pan's Labyrinth", "Ikiru", "My Neighbor Totoro", "On the Waterfront", "Room", "Ran", "The Gold Rush", "The Secret in Their Eyes", "The Bridge on the River Kwai", "Blade Runner", "Mr. Smith Goes to Washington", "The Seventh Seal", "Howl's Moving Castle", "Lock, Stock and Two Smoking Barrels", "Judgment at Nuremberg", "Casino", "The Bandit", "Incendies", "A Beautiful Mind", "A Wednesday", "The General", "The Elephant Man", "Wild Strawberries", "Arrival", "V for Vendetta", "Warrior", "The Wolf of Wall Street", "Manchester by the Sea", "Sunrise", "The Passion of Joan of Arc", "Gran Torino", "Rang De Basanti", "Trainspotting", "Dial M for Murder", "The Big Lebowski", "The Deer Hunter", "Tokyo Story", "Gone with the Wind", "Fargo", "Finding Nemo", "The Sixth Sense", "The Thing", "Hera Pheri", "Cool Hand Luke", "Andaz Apna Apna", "Rebecca", "No Country for Old Men", "How to Train Your Dragon", "Munna Bhai M.B.B.S.", "Sholay", "Kill Bill: Vol. 1", "Into the Wild", "Mary and Max", "Gone Girl", "There Will Be Blood", "Come and See", "It Happened One Night", "Life of Brian", "Rush", "Hotel Rwanda", "Platoon", "Shutter Island", "Network", "The Wages of Fear", "Stand by Me", "Wild Tales", "In the Name of the Father", "Spotlight", "Star Wars: The Force Awakens", "The Nights of Cabiria", "The 400 Blows", "Butch Cassidy and the Sundance Kid", "Mad Max: Fury Road", "The Maltese Falcon", "12 Years a Slave", "Ben-Hur", "The Grand Budapest Hotel", "Persona", "Million Dollar Baby", "Amores Perros", "Jurassic Park", "The Princess Bride", "Hachi: A Dog's Tale", "Memories of Murder", "Stalker", "Nausicaä of the Valley of the Wind", "Drishyam", "The Truman Show", "The Grapes of Wrath", "Before Sunrise", "Touch of Evil", "Annie Hall", "The Message", "Rocky", "Gandhi", "Harry Potter and the Deathly Hallows: Part 2", "The Bourne Ultimatum", "Diabolique", "Donnie Darko", "Monsters, Inc.", "Prisoners", "8½", "The Terminator", "The Wizard of Oz", "Catch Me If You Can", "Groundhog Day", "Twelve Monkeys", "Zootopia", "La Haine", "Barry Lyndon", "Jaws", "The Best Years of Our Lives", "Infernal Affairs", "Udaan", "The Battle of Algiers", "Strangers on a Train", "Dog Day Afternoon", "Sin City", "Kind Hearts and Coronets", "Gangs of Wasseypur", "The Help"]

var input = document.querySelector('textarea')

var tagify = new Tagify(input, {
        enforceWhitelist: true,
        delimiters: null,
  keepInvalidTags: true,
        whitelist: whitelist,
        callbacks: {
            add: console.log,  // callback when adding a tag
            remove: console.log   // callback when removing a tag
        }
})
!
999px

Console