How Can I Use CSS Variables in Internet Explorer 11?

CSS Variables Compatibility in IE11

CSS variables provide a convenient way to define and reuse variables in your CSS code, but they are not natively supported in Internet Explorer 11 (IE11). This poses a challenge for developers who need to support older browsers in their applications.

Solution: CSS Variables Ponyfill

Thankfully, there is a solution available in the form of a polyfill called CSS Variables Ponyfill. This library allows you to use CSS variables in IE11 and other browsers that do not support them natively.

Features and Functionality

CSS Variables Ponyfill offers a wide range of features, including:

• Client-side transformation of CSS custom properties to static values
• Live updates of runtime values in both modern and legacy browsers
• Transformation of ,
• Support for chained and nested var() functions
• Support for var() function fallback values
• Support for web components / shadow DOM CSS
• Watch mode auto-updates on and
• Lightweight (6k min gzip) and dependency-free

Usage

To use CSS Variables Ponyfill, simply include it in your HTML document before any other CSS files:

<script src="https://unpkg.com/css-vars-ponyfill/dist/css-vars-ponyfill.min.js"></script>

Examples

Here are a few examples of how CSS Variables Ponyfill can be used to create and use CSS variables in IE11:

Root-level custom properties

:root {
    --a: red;
}

p {
    color: var(--a);
}

Chained custom properties

:root {
    --a: var(--b);
    --b: var(--c);
    --c: red;
}

p {
    color: var(--a);
}

Nested custom properties

:root {
    --a: 1em;
    --b: 2;
}

p {
    font-size: calc(var(--a) * var(--b));
}

By using CSS Variables Ponyfill, you can take advantage of the benefits of CSS variables in IE11 and ensure that your web pages render consistently across all supported browsers.

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