Do not remove empty alt tag

CHANGELOG.md

@@ -1,5 +1,9 @@
 # minify-html changelog
 
+## 0.7.1
+
+- Do not remove `alt` tag when empty.
+
 ## 0.7.0
 
 - Fix Node.js library not including `cli.js`.

gen/package.json

@@ -2,7 +2,7 @@
   "private": true,
   "dependencies": {
     "@types/node": "^16.4.13",
-    "@wzlin/html-data": "^2021081005.0.0",
+    "@wzlin/html-data": "^2021121401.0.0",
     "ts-node": "^10.2.0",
     "typescript": "^4.3.5"
   }

rust/common/tests/mod.rs

@@ -460,9 +460,15 @@ fn test_processing_instructions() {
 #[test]
 fn test_js_minification() {
     eval_with_js_min(b"<script>let a = 1;</script>", b"<script>let a=1;</script>");
-    eval_with_js_min(b"<script type=text/javascript>let a = 1;</script>", b"<script>let a=1;</script>");
+    eval_with_js_min(
+        b"<script type=text/javascript>let a = 1;</script>",
+        b"<script>let a=1;</script>",
+    );
     // `export` statements are not allowed inline.
-    eval_with_js_min(b"<script type=module>let a = 1; export a;</script>", b"<script type=module></script>");
+    eval_with_js_min(
+        b"<script type=module>let a = 1; export a;</script>",
+        b"<script type=module></script>",
+    );
     eval_with_js_min(
         br#"
         <script>let a = 1;</script>

rust/main/src/tests/mod.rs

@@ -122,6 +122,16 @@ fn test_attr_whatwg_unquoted_value_minification() {
     );
 }
 
+#[test]
+fn test_alt_attr_minification() {
+    eval(br#"<img alt="  ">"#, br#"<img alt="  ">"#);
+    eval(br#"<img alt=" ">"#, br#"<img alt=" ">"#);
+    eval(br#"<img alt="">"#, br#"<img alt>"#);
+    eval(br#"<img alt=''>"#, br#"<img alt>"#);
+    eval(br#"<img alt>"#, br#"<img alt>"#);
+    eval(br#"<x-any-tag alt>"#, br#"<x-any-tag alt>"#);
+}
+
 #[test]
 fn test_viewport_attr_minification() {
     eval(
@@ -132,7 +142,7 @@ fn test_viewport_attr_minification() {
     eval_with_cfg(
         b"<meta name=viewport content='width=device-width, initial-scale=1'>",
         br#"<meta content="width=device-width,initial-scale=1" name=viewport>"#,
-        &spec_compliant_cfg
+        &spec_compliant_cfg,
     );
 }
 

rust/onepass/src/unit/tag.rs

@@ -144,7 +144,7 @@ pub fn process_tag(
                     .is_none();
                 if script_tag_type_is_js {
                     if &proc[value.unwrap()] != b"module" {
-                      erase_attr = true;
+                        erase_attr = true;
                     };
                 } else {
                     // Tag does not contain JS, don't minify JS.