How To Know If A Font Font Face Has Already Been Loaded

When you're working on a web project, ensuring that the font face you want to use has been completely loaded is crucial for a consistent and polished look. In this guide, we'll walk you through how you can easily check if a font face has already been loaded on your website using JavaScript.

First things first, it's important to understand that when a font face has been loaded, the browser updates the Document Object Model (DOM) to reflect this change. This means that you can leverage this feature to determine whether a particular font face has finished loading or not.

One way to verify if a font has been loaded is by checking the computed style of an element that uses that font. By comparing the computed font-family of an element to the desired font face, you can determine if the font has been successfully loaded.

To do this, you can create a hidden element in your HTML with the desired font face applied to it. This element can be an off-screen div or span styled with the font you are checking for. Once you've created this hidden element, you can then use JavaScript to access its computed style and compare it to the font face you are looking for.

Here is an example of how you can achieve this:

const hiddenElement = document.createElement('div');
hiddenElement.style.fontFamily = 'YourDesiredFontFace';
hiddenElement.style.opacity = 0; // Ensure the element is hidden

document.body.appendChild(hiddenElement);

const computedFontFamily = window.getComputedStyle(hiddenElement).fontFamily;

if (computedFontFamily.includes('YourDesiredFontFace')) {
  console.log('Your font face has been loaded successfully!');
} else {
  console.log('Your font face is still loading...');
}

document.body.removeChild(hiddenElement); // Clean up

In the code snippet above, we create a hidden div element with the specified font face and then check its computed style to see if it matches the desired font. If it does, we log a success message indicating that the font face has been loaded; otherwise, we log a message indicating that the font is still loading.

By using this approach, you can have more control over your web fonts and make informed decisions about when to apply styles that depend on specific font faces.

Remember, ensuring that your fonts have been loaded can greatly improve the user experience on your website by preventing unexpected font changes or layout shifts. By following the steps outlined in this article, you can easily determine if a font face has been successfully loaded on your web project and take appropriate action based on the result.

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