textFit

by STRML

STRML / textFit

A jQuery-free component that quickly fits single and multi-line text to the width (and optionally he...

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textFit
- Hassle-Free Text Fitting

A fast, dependency-free text sizing component that quickly fits single and multi-line text to the width and/or height of its container.

Example

Capabilities

textFit
is:
  • Fast, using binary search to quickly fit text to its container in
    log n
    time, making it far faster than most solutions.
  • Dependency-free.
  • Small.
    4.1KB
    minified and
    1.5KB
    gzipped.
  • Supports both horizontal and vertical centering, including vertical centering with Flexbox for maximum accuracy.
  • Supports any font face, padding, and multiline text.

Browser Support

textFit
supports IE9+, Firefox, Chrome, Opera, and most mobile browsers. If you find an incompatibility, please file an issue.

If you require IE <= 8 support, please use the jQuery version. Functionality is identical between v1.0 and v2.0, the only change was the removal of the jQuery dependency.

Changelog

v2.3.1

  • Fix #20 - properly iterate over
    HTMLCollection
    objects.

v2.3.0

  • Added
    alignVertWithFlexbox
    . This does better vertical alignment and fixes #14.

v2.2.0

  • Throw errors instead of just printing to console when missing height/width.
    • Removed
      options.suppressErrors
      . Wrap in
      try/catch
      instead if you really need this.
  • Slight refactor.
  • Added automatic build on prepublish.

v2.1.1

  • Fixed a bug with
    alignVert
    when reprocessing.
  • Added full UMD shim and published to npm.

v2.1

  • Reworked alignVert.
  • reProcess
    is now
    true
    by default. Set to
    false
    if you want to fire-and-forget on potentially processed nodes. This was originally false by default because it was being used in an infinite scrolling list.

v2.0

  • Removed jQuery dependency.

Usage

Fit me, I am some text
// textFit accepts arrays
textFit(document.getElementsByClassName('box'));
// or single DOM elements
textFit(document.getElementsByClassName('box')[0]);
// Use jQuery selectors if you like.
textFit($('#box')[0])

The text will scale until it reaches the horizontal or vertical bounds of the box. Explicit width and height styles are required in order to fit the text.

Advanced Usage

Multiline Strings

If your text has multiple lines, textFit() will automatically detect that and disable white-space: no-wrap! No changes are necessary.

This text
Has multiple lines
Fit me!
textFit(document.getElementsByClassName('box'))

If, for some reason, the automatic detection is not working out for you, use the following to explicitly turn on multiLine fitting:

textFit(document.getElementsByClassName('box'), {multiLine: true})

Horizontal/Vertical Centering

This text
Has multiple lines
And wants to be centered horizontally and vertically
Fit me!
textFit(document.getElementsByClassName('box'), {alignHoriz: true, alignVert: true})

Minimum and Maximum Sizes

Sometimes you want to make sure that your text remains sanely sizes if it is very short or very long. textFit has you covered:

Short Text
textFit(document.getElementsByClassName('box'), {minFontSize:10, maxFontSize: 50})

Implementation Details

textFit determines reasonable minimum and maximum bounds for your text. The defaults are listed below.

To ensure accurate results with various font-faces, line-heights, and letter-spacings, textFit resizes the text until it fits the box as accurately as possible. Unlike many similar plugins, textFit uses binary search to find the correct fit, which speeds the process significantly. textFit is fast enough to use in production websites.

textFit()
is a synchronous function. Because of this, resizes should be invisible as the render thread does not have a chance to do a layout until completion. Normal processing times should be < 1ms and should not significantly block renders.

Default Settings

From the source, for reference:

settings = {
    alignVert: false, // if true, textFit will align vertically using css tables
    alignHoriz: false, // if true, textFit will set text-align: center
    multiLine: false, // if true, textFit will not set white-space: no-wrap
    detectMultiLine: true, // disable to turn off automatic multi-line sensing
    minFontSize: 6,
    maxFontSize: 80,
    reProcess: true, // if true, textFit will re-process already-fit nodes. Set to 'false' for better performance
    widthOnly: false, // if true, textFit will fit text to element width, regardless of text height
    alignVertWithFlexbox: false, // if true, textFit will use flexbox for vertical alignment
};

License

MIT

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