How Can I Detect Font Loading Status to Improve Element Styling?

Detecting Font Loading Status for Enhanced Element Styling

While using Font-Awesome, it's crucial to ensure that icons are only displayed when their corresponding font files have been loaded. To achieve this, it's essential to know if a font has been loaded.

jQuery-FontSpy.js to the Rescue

Enter jQuery-FontSpy.js, a plugin that compares the widths of text strings in different fonts to determine if a custom font has been loaded. It provides developers with fine-grained control over element styling based on the font's load status.

Implementation

To integrate jQuery-FontSpy.js, simply include it as a reference in your JavaScript file. This plugin takes various options for customization, including:

• font: Specifies the custom font family to check for.
• onLoad: CSS class to apply when the font has loaded.
• onFail: CSS classes to apply if the font fails to load.
• testFont: Web-safe font used for comparison.
• testString: String used to calculate the font width.
• timeOut: Timeout duration to prevent indefinite font loading animation.

Applying the Plugin

Once jQuery-FontSpy.js is included, you can apply it to elements using the .fontSpy() function. For instance, the following code snippet applies the plugin to an element with the class bannerTextChecked.

$('.bannerTextChecked').fontSpy({
  onLoad: 'hideMe',
  onFail: 'fontFail anotherClass'
});

Styling for Visibility Control

To control the visibility of elements based on font loading, you can define CSS classes like hideMe and fontFail.

.hideMe {
  visibility: hidden !important;
}
.fontFail {
  visibility: visible !important;
  /* fall back font */
  /* necessary styling so fallback font doesn't break your layout */
}

Conclusion

jQuery-FontSpy.js empowers developers with a reliable solution for detecting font loading status. By utilizing the provided options and CSS styling, you can create a smooth and dynamic user experience where elements adapt seamlessly to the availability of fonts.

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