To effectively shrink text to fit with responsive web design, you need to understand the basics of text scaling. The goal is to make text readable on various devices and screen sizes without compromising its meaning.
A common approach is to use the `font-size` property with relative units such as percentages or ems. This allows the text to scale up or down based on the screen size.
For example, setting `font-size: 1.5em` will make the text 1.5 times larger than the default font size. This technique is useful for creating a consistent look and feel across different devices.
Understanding Text Size
Scaling font size to match the container's width is crucial for maintaining readability across different devices. Developers must ensure that font sizes scale correctly to match the container's and viewport widths.
textFit is a JavaScript library that adjusts font sizes to fit text into a container, but it's designed for two-dimensions, requiring a width and height on the element.
CSS Viewport Units offer a fluid approach to typography, using units like vw (viewport width) to create a font size that scales smoothly across different devices.
Using viewport units like vw can help you find a "magic number" where the text fits the container and doesn't break as you resize.
Making Text Fit
You can use viewport units for font sizes to make text scale based on the viewport's width. This is a common method for making font size adapt to the container's width.
CSS offers several techniques to make font size adapt to the container's width, including using media queries to apply different font sizes at specific breakpoints.
One popular JavaScript library for making text fit is FitText, which can be used in conjunction with a magic number to get the sizing just right.
FitText is available in non-jQuery versions, including one from @adactio and another from @patrickmarabeas.
There are other JavaScript libraries available for making text fit, including textFit and fitty. textFit is designed for two-dimensions, requiring both width and height on the element, while fitty resizes type to maximize horizontally without requiring magic numbers.
Here are some popular JavaScript libraries for making text fit:
- FitText (with and without jQuery)
- textFit
- fitty
- non-jQuery FitText from @adactio
- Angular.js FitText.js from @patrickmarabeas
- AMP-HTML FitText
- FitText UMD by @peacechen
Developers can use these libraries to ensure that text is legible and aesthetically pleasing across all devices, but it's also important to remember to test across different browsers and devices for the best results.
Advanced Techniques
Viewport units like vw offer a fluid approach to typography, creating a font size that scales smoothly across different devices.
Using vw units provides a more dynamic and responsive solution than fixed font sizes, making it easier to create a seamless user experience.
CSS alone may not be sufficient for resizing font to fit a container, especially when dealing with complex layouts.
A JavaScript library or custom JavaScript code can calculate the font size dynamically based on the container width, providing a more robust solution for dynamic font resizing.
Best Practices
To shrink text to fit, use the `white-space: nowrap` property, which prevents text from wrapping to a new line, allowing it to shrink instead.
When working with long strings of text, it's essential to use the `text-overflow: ellipsis` property to add an ellipsis at the end of the text, making it clear that there's more text beyond what's visible.
Use the `overflow: hidden` property to prevent text from overflowing its container, and instead, shrink it to fit the available space.
Common Pitfalls and How to Avoid Them
Scaling font size to fit a container can lead to issues such as text overflow or illegibility at small screen sizes. Testing your design across multiple devices is essential to avoid these pitfalls.
Using max-value and min-value constraints in conjunction with media queries can help maintain legibility. This approach ensures that your text remains readable even on smaller screens.
Implementing fallbacks for older browsers that may not support certain CSS features is crucial for avoiding common pitfalls. By doing so, you can ensure that your design looks great across a wide range of devices and browsers.
Browser Compatibility
Firefox supports the CSS font-size-adjust property by default, while Chrome and Opera only support it behind a flag that can be enabled in chrome://flags.
The CSS font-size-adjust property was initially introduced in CSS2, but later removed in CSS2.1 and re-introduced in CSS3.
Only version 43 to 30 of Chrome and Opera support this property, despite it being available behind a flag.
Edge and Safari don't support the CSS font-size-adjust property at all, which can impact your website's accessibility and usability.
It's essential to consider browser compatibility when implementing CSS features like font-size-adjust to ensure a smooth user experience.
Comments
Chris Morgan warns that using vw to measure things precisely is a recipe for disaster, as it measures the viewport's initial containing block, which can be wider than the body width due to the vertical scrollbar.
You can't succeed in measuring things precisely with vw, so it's best to just not try. If you insist on using it, make sure to allow at least 20px of slack.
Vanderson shares a similar sentiment, suggesting that trying to make adjustments with text "exact" is a recipe for disaster. He recommends letting go of control and using breakpoints or vw + calc instead.
Peter Schmolze shares a code example that uses calc to set a font size based on the viewport width. The code uses a formula that calculates the font size based on the minimum and maximum font sizes, as well as the minimum and maximum viewport widths.
Tobi Reif suggests using JavaScript to achieve a similar effect. He provides a link to a demo that shows how to resize a heading using JavaScript.
Here are some options for fitting text vertically:
- Using SVG
- Using vw + calc
- Using JavaScript
Note: The above list is not exhaustive, but it covers some of the options mentioned in the comments.
Sources
- https://blog.hubspot.com/website/responsive-text
- https://community.shopify.com/c/shopify-design/fix-sizing-of-text-for-mobile-view-using-custom-css/m-p/1954331
- https://www.dhiwise.com/post/exploring-how-to-make-css-font-size-fit-container-effectively
- https://www.lambdatest.com/blog/css-font-size-adjust/
- https://css-tricks.com/fitting-text-to-a-container/
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