wilsonzlin · charlyisidore · Aug 8, 2025
diff --git a/bench/runners/minify-html/Cargo.toml b/bench/runners/minify-html/Cargo.toml
@@ -9,3 +9,8 @@ edition = "2018"
 minify-html = { path = "../../../minify-html" }
 serde = { version = "1.0.104", features = ["derive"] }
 serde_json = "1.0.44"
+
+[features]
+default = ["lightningcss", "minify-js"]
+lightningcss = ["minify-html/lightningcss"]
+minify-js = ["minify-html/minify-js"]
diff --git a/bench/runners/minify-html/src/main.rs b/bench/runners/minify-html/src/main.rs
@@ -21,8 +21,14 @@ fn main() {
   let mut cfg = Cfg::new();
   cfg.enable_possibly_noncompliant();
   if !html_only {
-    cfg.minify_css = true;
-    cfg.minify_js = true;
+    #[cfg(feature = "lightningcss")]
+    {
+      cfg.minify_css = true;
+    }
+    #[cfg(feature = "minify-js")]
+    {
+      cfg.minify_js = true;
+    }
   };
 
   for t in fs::read_dir(input_dir).unwrap().map(|d| d.unwrap()) {

diff --git a/minify-html/Cargo.toml b/minify-html/Cargo.toml
@@ -17,8 +17,13 @@ maintenance = { status = "actively-developed" }
 [dependencies]
 ahash = "0.8"
 aho-corasick = "0.7"
-lightningcss = "1.0.0-alpha.65"
+lightningcss = { version = "1.0.0-alpha.65", optional = true }
 memchr = "2"
 minify-html-common = { version = "0.0.2", path = "../minify-html-common" }
-minify-js = "0.6"
+minify-js = { version = "0.6", optional = true }
 once_cell = "1.19.0"
+
+[features]
+default = ["lightningcss", "minify-js"]
+lightningcss = ["dep:lightningcss"]
+minify-js = ["dep:minify-js"]
diff --git a/minify-html/src/cfg/mod.rs b/minify-html/src/cfg/mod.rs
@@ -18,10 +18,12 @@ pub struct Cfg {
   pub keep_input_type_text_attr: bool,
   /// Keep SSI comments.
   pub keep_ssi_comments: bool,
+  #[cfg(feature = "lightningcss")]
   /// Minify CSS in `<style>` tags and `style` attributes using [https://github.com/parcel-bundler/lightningcss](lightningcss).
   pub minify_css: bool,
   /// Minify DOCTYPEs. Minified DOCTYPEs may not be spec compliant, but will still be parsed correctly by almost all browsers.
   pub minify_doctype: bool,
+  #[cfg(feature = "minify-js")]
   /// Minify JavaScript in `<script>` tags using [minify-js](https://github.com/wilsonzlin/minify-js).
   pub minify_js: bool,
   /// When `{{`, `{#`, or `{%` are seen in content, all source code until the subsequent matching closing `}}`, `#}`, or `%}` respectively gets piped through untouched.

diff --git a/minify-html/src/minify/attr.rs b/minify-html/src/minify/attr.rs
@@ -2,10 +2,8 @@ use crate::entity::encode::encode_entities;
 use crate::Cfg;
 use aho_corasick::AhoCorasickBuilder;
 use aho_corasick::MatchKind;
-use lightningcss::stylesheet::MinifyOptions;
-use lightningcss::stylesheet::ParserOptions;
-use lightningcss::stylesheet::PrinterOptions;
-use lightningcss::stylesheet::StyleAttribute;
+#[cfg(feature = "lightningcss")]
+use lightningcss::stylesheet::{MinifyOptions, ParserOptions, PrinterOptions, StyleAttribute};
 use minify_html_common::gen::attrs::ATTRS;
 use minify_html_common::gen::codepoints::DIGIT;
 use minify_html_common::pattern::Replacer;
@@ -16,7 +14,6 @@ use minify_html_common::whitespace::left_trim;
 use minify_html_common::whitespace::remove_all_whitespace;
 use minify_html_common::whitespace::right_trim;
 use once_cell::sync::Lazy;
-use std::str::from_utf8;
 
 fn build_double_quoted_replacer() -> Replacer {
   let mut patterns = Vec::<Vec<u8>>::new();
@@ -405,9 +402,10 @@ pub fn minify_attr(
     };
   };
 
+  #[cfg(feature = "lightningcss")]
   if name == b"style" && cfg.minify_css {
     let result = match StyleAttribute::parse(
-      from_utf8(&value_raw).expect("`style` attribute value contains non-UTF-8"),
+      std::str::from_utf8(&value_raw).expect("`style` attribute value contains non-UTF-8"),
       ParserOptions::default(),
     ) {
       Ok(mut sty) => {

diff --git a/minify-html/src/minify/content.rs b/minify-html/src/minify/content.rs
@@ -1,14 +1,17 @@
 use super::rcdata::minify_rcdata;
 use crate::ast::NodeData;
+#[cfg(any(feature = "lightningcss", feature = "minify-js"))]
 use crate::ast::ScriptOrStyleLang;
 use crate::cfg::Cfg;
 use crate::entity::encode::encode_entities;
 use crate::minify::bang::minify_bang;
 use crate::minify::comment::minify_comment;
+#[cfg(feature = "lightningcss")]
 use crate::minify::css::minify_css;
 use crate::minify::doctype::minify_doctype;
 use crate::minify::element::minify_element;
 use crate::minify::instruction::minify_instruction;
+#[cfg(feature = "minify-js")]
 use crate::minify::js::minify_js;
 use aho_corasick::AhoCorasickBuilder;
 use aho_corasick::MatchKind;
@@ -155,10 +158,13 @@ pub fn minify_content(
       NodeData::RcdataContent { typ, text } => minify_rcdata(cfg, out, typ, &text),
       NodeData::ScriptOrStyleContent { code, lang: _ } if code.is_empty() => {}
       NodeData::ScriptOrStyleContent { code, lang } => match lang {
+        #[cfg(feature = "lightningcss")]
         ScriptOrStyleLang::CSS => minify_css(cfg, out, &code),
-        ScriptOrStyleLang::Data => out.extend_from_slice(&code),
+        #[cfg(feature = "minify-js")]
         ScriptOrStyleLang::JS => minify_js(cfg, minify_js::TopLevelMode::Global, out, &code),
+        #[cfg(feature = "minify-js")]
         ScriptOrStyleLang::JSModule => minify_js(cfg, minify_js::TopLevelMode::Module, out, &code),
+        _ => out.extend_from_slice(&code),
       },
       NodeData::Text { value } => {
         let min = encode_entities(&value, false, !cfg.allow_optimal_entities);

diff --git a/minify-html/src/minify/mod.rs b/minify-html/src/minify/mod.rs
@@ -2,10 +2,12 @@ pub mod attr;
 pub mod bang;
 pub mod comment;
 pub mod content;
+#[cfg(feature = "lightningcss")]
 pub mod css;
 pub mod doctype;
 pub mod element;
 pub mod instruction;
+#[cfg(feature = "minify-js")]
 pub mod js;
 pub mod rcdata;
 #[cfg(test)]

diff --git a/minify-html/src/tests/mod.rs b/minify-html/src/tests/mod.rs
@@ -1,6 +1,8 @@
 use crate::cfg::Cfg;
 use crate::minify;
+#[cfg(feature = "lightningcss")]
 use minify_html_common::tests::create_common_css_test_data;
+#[cfg(feature = "minify-js")]
 use minify_html_common::tests::create_common_js_test_data;
 use minify_html_common::tests::create_common_noncompliant_test_data;
 use minify_html_common::tests::create_common_test_data;
@@ -17,12 +19,14 @@ pub fn eval_with_noncompliant(src: &'static [u8], expected: &'static [u8]) {
   eval_with_cfg(src, expected, &cfg)
 }
 
+#[cfg(feature = "minify-js")]
 pub fn eval_with_js_min(src: &'static [u8], expected: &'static [u8]) -> () {
   let mut cfg = Cfg::new();
   cfg.minify_js = true;
   eval_with_cfg(src, expected, &cfg);
 }
 
+#[cfg(feature = "lightningcss")]
 pub fn eval_with_css_min(src: &'static [u8], expected: &'static [u8]) -> () {
   let mut cfg = Cfg::new();
   cfg.minify_css = true;
@@ -50,9 +54,11 @@ fn test_common() {
   for (a, b) in create_common_noncompliant_test_data() {
     eval_with_noncompliant(a, b);
   }
+  #[cfg(feature = "lightningcss")]
   for (a, b) in create_common_css_test_data() {
     eval_with_css_min(a, b);
   }
+  #[cfg(feature = "minify-js")]
   for (a, b) in create_common_js_test_data() {
     eval_with_js_min(a, b);
   }
@@ -76,6 +82,7 @@ fn test_keep_input_type_text_attr() {
 
 #[test]
 fn test_preserve_template_brace_syntax() {
+  #[cfg(feature = "minify-js")]
   eval_with_js_min(
     b"<p> {{   hello    world! %}  {%}{#} echo '  </p><P><script>  let x = 1; //'  }} </p>",
     b"<p>{{ hello world! %} {%}{#} echo '<p><script>let x=1",
@@ -223,6 +230,7 @@ fn test_viewport_attr_minification() {
   );
 }
 
+#[cfg(feature = "lightningcss")]
 #[test]
 fn test_style_attr_minification() {
   eval_with_css_min(