How to Set SVG Height by Font Size Without Using Flexbox

Learn how to adjust SVG icon heights according to font size in your HTML components without using flexbox. A step-by-step guide for web developers.
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How to Set SVG Height by Font Size Without Using Flexbox

When it comes to web development, combining text and SVG icons can enhance the visual appeal of your content. However, one common challenge developers face is ensuring that the SVG height matches the font size of the surrounding text. This is particularly crucial when dealing with various HTML elements like <h1>, <p>, and <span>. In this post, we will explore how to set the height of SVG icons based on the font size, all without relying on the Flexbox layout!

The Problem

Imagine you are working on a webpage filled with various text elements, and you want to integrate SVG icons inline with that text. You find that setting the height of the SVG to look proportional to the text is tricky. You’ve tried using properties like line-height and height: 100%, but they haven't yielded satisfactory results. Thus, the question arises: How can you effectively set the SVG height in relation to the font size of text elements?

The Solution

Step 1: Set the SVG Height Using CSS

One effective way to control the height of the SVG icons based on the font size is to use CSS em units. The em unit is relative to the font size of the current element, which makes it an excellent choice for our needs.

Here's how you can define the CSS class for the icons:

[[See Video to Reveal this Text or Code Snippet]]

In this example, we're setting the height to 0.7em. You can adjust this value to make the SVG icon proportionate to your text size. The width: auto; property ensures that the width of the SVG adjusts based on its contents.

Step 2: Implement the SVG in HTML

Next, you need to include the SVG within your HTML elements appropriately. Here's an example of how to implement it in various tags like <h1>, <p>, and <span>:

[[See Video to Reveal this Text or Code Snippet]]

In this snippet:

We define the SVG with a viewBox attribute, which helps in scaling the SVG correctly.

We then use the heightByFontSize class to control the size of the SVG based on the font size of the surrounding text.

Step 3: Adjusting for Different Elements

Depending on the text size and styles used in your HTML elements, you can fine-tune the height value in the CSS class. Here are some considerations:

If your text is inside a larger heading (like <h1> or <h2>), you might want to use a smaller em value for the SVG.

Conversely, for smaller text like <span>, a higher em value may be appropriate to maintain proportions.

Conclusion

Setting SVG heights based on font size can help create a cohesive visual flow in your web design. By using CSS em units and implementing SVG icons within text elements, you can achieve a polished look without resorting to complex layout techniques like Flexbox. Whether you're designing a webpage with informative headings, playful paragraphs, or engaging spans, keeping your SVGs proportional will boost user experience and aesthetic appeal.

Final Thoughts

Experiment with different em values and HTML elements to find the best look for your project. With just a few lines of CSS, you can significantly enhance how graphic elements interact with your text content, providing a more engaging experience for your site visitors.

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