Fitting Text to a Container

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There are a number of ways to go about putting some text in a container and having it size itself to fill that container. There are different technologies we can use and different considerations to think about. Let us count the ways.

Magic Number it with viewport units

If you set type with vw (viewport width) units, you can find an exact number where the text pretty closely fits the container and doesn't break as you resize. I'd call this a magic number.

In this case, font-size: 25.5vw; works down to a 320px viewport, but still will break much lower than that.

See the Pen Fitted Text with Viewport Units by Chris Coyier (@chriscoyier) on CodePen.

This is kind of a less exotic version of fluid typography, which involves more of a sprinkling of viewport units and min/max sizes.

FitText

Dave Rupert's FitText is up for the job. You still need a bit of a magic number to get the sizing just right for any particular job:

See the Pen Fitted Text with FitText by Chris Coyier (@chriscoyier) on CodePen.

FitText without jQuery

If you aren't using jQuery, there are options. Listed from the repo:

• non-jQuery FitText from @adactio
• Angular.js FitText.js from @patrickmarabeas
• AMP-HTML FitText
• FitText UMD by @peacechen

Example of the first:

See the Pen Fitted Text with FitText (no jQuery) by Chris Coyier (@chriscoyier) on CodePen.

textFit

Swap the words in FitText around and you got yourself textFit! It's another JavaScript library that adjusts font sizes to fit text into a container. Big caveat here though: textFit is designed for two-dimensions. So you need a width and height on the element for it to do it's thing.

See the Pen Fitted Text with textFit by Chris Coyier (@chriscoyier) on CodePen.

fitty

fitty is more like FitText in that it resizes type to maximize just horizontally, but actually seems to require no magic numbers.

See the Pen Fitted Text with fitty by Chris Coyier (@chriscoyier) on CodePen.

TextFill

TextFill is jQuery-based and requires a width, height, and a configured maximum font size to work. Here's the basic demo we've been working from:

See the Pen Fitted Text with TextFill by Chris Coyier (@chriscoyier) on CodePen.

FlowType

FlowType is kind of designed to work on a whole document of text, resizing it all fluidly at once, with minimum and maxium viewport sizes. But you can scope it however you want. You also apply a magic number to get things how you want them.

See the Pen Fitted Text with FlowType by Chris Coyier (@chriscoyier) on CodePen.

Just use SVG

With width: 100% and a viewBox, SVG will be a fullsize box that resizes with an aspect ratio. Pretty neat trick! To set the type, you'll need some magic numbers to get that viewBox just right and push the text into the right spot — but it's doable with zero dependencies, just like the viewport units demo.

See the Pen Fitted Text with SVG by Chris Coyier (@chriscoyier) on CodePen.

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