postcss-viewport-unit-fallback

postcss-viewport-unit-fallback

PostCSS plugin to fallback viewport unit(dvh/lvh/svh) for old browsers.

.foo {
  height: 100dvh;
}

.foo {
  height: 100vh; /* Automatically add this line, and old browser doesn't support dvh use this */
  height: 100dvh; /* New browser supports dvh use this */
}

Usage

Step 1: Install plugin:

npm install --save-dev postcss postcss-viewport-unit-fallback

Step 2: Check you project for existed PostCSS config: postcss.config.js in the project root, "postcss" section in package.json or postcss in bundle config.

If you do not use PostCSS, add it according to official docs and set this plugin in settings.

Step 3: Add the plugin to plugins list:

module.exports = {
  plugins: [
+   require('postcss-viewport-unit-fallback'),
    require('autoprefixer')
  ]
}