diff --git a/crates/swc_html_minifier/src/lib.rs b/crates/swc_html_minifier/src/lib.rs
index 71090146c537..c56077434120 100644
--- a/crates/swc_html_minifier/src/lib.rs
+++ b/crates/swc_html_minifier/src/lib.rs
@@ -1937,11 +1937,7 @@ impl Minifier<'_> {
         match &self.options.minify_js {
             MinifyJsOption::Bool(_) => JsOptions {
                 parser: JsParserOptions::default(),
-                minifier: swc_ecma_minifier::option::MinifyOptions {
-                    compress: Some(swc_ecma_minifier::option::CompressOptions::default()),
-                    mangle: Some(swc_ecma_minifier::option::MangleOptions::default()),
-                    ..Default::default()
-                },
+                minifier: swc_ecma_minifier::option::MinifyOptions::default(),
                 codegen: swc_ecma_codegen::Config::default(),
             },
             MinifyJsOption::Options(js_options) => *js_options.clone(),
diff --git a/crates/swc_html_minifier/tests/fixture/attribute/disabled-normalize_attributes/output.min.html b/crates/swc_html_minifier/tests/fixture/attribute/disabled-normalize_attributes/output.min.html
index 6d7d554503bf..b4c123c2b3cb 100644
--- a/crates/swc_html_minifier/tests/fixture/attribute/disabled-normalize_attributes/output.min.html
+++ b/crates/swc_html_minifier/tests/fixture/attribute/disabled-normalize_attributes/output.min.html
@@ -1,2 +1,2 @@
 <!doctype html><html lang=en><title>Document</title><link rel=stylesheet href=test.css media="screen and (min-width:1024px)"><a rel="bar baz foo"></a>
-<div onclick='t:alert("test")'></div>
\ No newline at end of file
+<div onclick='javascript:alert("test")'></div>
\ No newline at end of file
diff --git a/crates/swc_html_minifier/tests/fixture/attribute/exportparts/output.min.html b/crates/swc_html_minifier/tests/fixture/attribute/exportparts/output.min.html
index 25d0ef832cf3..f817e875050b 100644
--- a/crates/swc_html_minifier/tests/fixture/attribute/exportparts/output.min.html
+++ b/crates/swc_html_minifier/tests/fixture/attribute/exportparts/output.min.html
@@ -19,4 +19,4 @@
 
 <tabbed-custom-element-exportparts></tabbed-custom-element-exportparts>
 
-<script type=module>globalThis.customElements.define("tabbed-custom-element",class extends HTMLElement{constructor(){super();let e=document.getElementById("tabbed-custom-element").content,t=this.attachShadow({mode:"open"});t.appendChild(e.cloneNode(!0));let o=[];for(let n of this.shadowRoot.children)n.getAttribute("part")&&o.push(n);o.forEach(e=>{e.addEventListener("click",e=>{o.forEach(e=>{e.part="tab"}),e.target.part="tab active"})})}}),globalThis.customElements.define("tabbed-custom-element-exportparts",class extends HTMLElement{constructor(){super();let e=document.getElementById("tabbed-custom-element-exportparts").content,t=this.attachShadow({mode:"open"});t.appendChild(e.cloneNode(!0))}})</script>
\ No newline at end of file
+<script type=module>globalThis.customElements.define("tabbed-custom-element",class extends HTMLElement{constructor(){super();let template=document.getElementById("tabbed-custom-element").content,shadowRoot=this.attachShadow({mode:"open"});shadowRoot.appendChild(template.cloneNode(!0));let tabs=[];for(let elem of this.shadowRoot.children)elem.getAttribute("part")&&tabs.push(elem);tabs.forEach(tab=>{tab.addEventListener("click",e=>{tabs.forEach(tab=>{tab.part="tab"}),e.target.part="tab active"})})}}),globalThis.customElements.define("tabbed-custom-element-exportparts",class extends HTMLElement{constructor(){super();let template=document.getElementById("tabbed-custom-element-exportparts").content,shadowRoot=this.attachShadow({mode:"open"});shadowRoot.appendChild(template.cloneNode(!0))}})</script>
\ No newline at end of file
diff --git a/crates/swc_html_minifier/tests/fixture/element/script-group/output.min.html b/crates/swc_html_minifier/tests/fixture/element/script-group/output.min.html
index cc09c528dec4..cc2181c05e8d 100644
--- a/crates/swc_html_minifier/tests/fixture/element/script-group/output.min.html
+++ b/crates/swc_html_minifier/tests/fixture/element/script-group/output.min.html
@@ -1,33 +1,33 @@
 <!doctype html><html lang=en><title>Document</title><div>breaker</div>
-<script>var o="test";console.log(o);var e="test";console.log(e)</script>
+<script>var a="test";console.log(a);var b="test";console.log(b)</script>
 
 
 <div>breaker</div>
-<script>var o="test";console.log(o);var e="test";console.log(e)</script>
+<script>var a="test";console.log(a);var b="test";console.log(b)</script>
 
 
 <div>breaker</div>
-<script>var o="test";console.log(o);var e="test";console.log(e)</script>
+<script>var a="test";console.log(a);var b="test";console.log(b)</script>
 
 
 <div>breaker</div>
-<script>var o="test";console.log(o);var e="test";console.log(e)</script>
+<script>var a="test";console.log(a);var b="test";console.log(b)</script>
 
 
 <div>breaker</div>
-<script>var o="test";console.log(o)</script><script crossorigin=use-credentials>var o="test";console.log(o)</script>
+<script>var a="test";console.log(a)</script><script crossorigin=use-credentials>var b="test";console.log(b)</script>
 
 
 <div>breaker</div>
-<script crossorigin=use-credentials>var o="test";console.log(o);var e="test";console.log(e)</script>
+<script crossorigin=use-credentials>var a="test";console.log(a);var b="test";console.log(b)</script>
 
 
 <div>breaker</div>
-<script>(function o(){let o="1";console.log(o)})();let o="1";console.log(o)</script>
+<script>(function test(){let test="1";console.log(test)})();let test="1";console.log(test)</script>
 
 
 <div>breaker</div>
-<script type=module>var a="test";console.log(a)</script><script>var o="test";console.log(o)</script>
+<script type=module>var a="test";console.log(a)</script><script>var b="test";console.log(b)</script>
 
 
 <div>breaker</div>
@@ -35,26 +35,26 @@
 
 
 <div>breaker</div>
-<script>var o="test";console.log(o)</script><script type=unknown>var b = "test";console.log(b)</script>
+<script>var a="test";console.log(a)</script><script type=unknown>var b = "test";console.log(b)</script>
 
 
 <div>breaker</div>
-<script src=test.js></script><script>var o="test";console.log(o)</script>
+<script src=test.js></script><script>var b="test";console.log(b)</script>
 
 <div>breaker</div>
 
 
 <div>breaker</div>
-<script>var o="test";console.log(o);var e="test";console.log(e)</script>
+<script>var a="test";console.log(a);var b="test";console.log(b)</script>
 
 <div>breaker</div>
-<script>var o="test";console.log(o);var e="test";console.log(e)</script>
+<script>var a="test";console.log(a);var b="test";console.log(b)</script>
 
 <div>breaker</div>
 <script type=module>var a="test";console.log(a);var a1="test";console.log(a1)</script>
 
 <div>breaker</div>
-<script type=module>var a="test";console.log(a)</script><script>var o="test";console.log(o)</script>
+<script type=module>var a="test";console.log(a)</script><script>var a="test";console.log(a)</script>
 
 <div>breaker</div>
 <script type=module>var a="test";console.log(a);var a1="test";console.log(a1)</script>
@@ -63,31 +63,31 @@
 <script type=module>var a="test";console.log(a);var a1="test";console.log(a1)</script>
 
 <div>breaker</div>
-<script>let e="test";console.log(e);let l="test";console.log(l);let e="test";console.log(e);let l="test";console.log(l)</script>
+<script>let a="test";console.log(a);let b="test";console.log(b);let a="test";console.log(a);let b="test";console.log(b)</script>
 
 <div>breaker</div>
 <script type=module>let a="test";console.log(a);const b="test";console.log("test");let a1="test";console.log(a1);const b1="test";console.log("test")</script>
 
 <div>breaker</div>
-<script>let e=[1,2,3];[()=>{console.log("test")},2,3][0]()</script>
+<script>let foo=[1,2,3];[()=>{console.log("test")},2,3][0]()</script>
 
 <div>breaker</div>
 <script type=module>let a="test";console.log(a),console.log(a),console.log(a);let a1="test";console.log(a1),console.log(a1),console.log(a1)</script>
 
 <div>breaker</div>
-<script>let o="test";console.log(o);console.log(o);console.log(o);let o="test";console.log(o);console.log(o);console.log(o)</script>
+<script>let a="test";console.log(a);console.log(a);console.log(a);let a="test";console.log(a);console.log(a);console.log(a)</script>
 
 <div>breaker</div>
-<script>var o="test";console.log(o);console.log(o);console.log(o);var o="test";console.log(o);console.log(o);console.log(o)</script>
+<script>var a="test";console.log(a);console.log(a);console.log(a);var a="test";console.log(a);console.log(a);console.log(a)</script>
 
 <div>breaker</div>
-<script>var o="test";console.log(o);console.log(o);console.log(o);var o="test";console.log(o);console.log(o);console.log(o);var o="test";console.log(o);console.log(o);console.log(o)</script>
+<script>var a="test";console.log(a);console.log(a);console.log(a);var a="test";console.log(a);console.log(a);console.log(a);var a="test";console.log(a);console.log(a);console.log(a)</script>
 
 <div>breaker</div>
 <script type=module>var a="test";console.log(a),console.log(a),console.log(a);var a1="test";console.log(a1),console.log(a1),console.log(a1);var a2="test";console.log(a2),console.log(a2),console.log(a2)</script>
 
 <div>breaker</div>
-<script type=module>var a="test";console.log(a),console.log(a),console.log(a)</script><script>var o="test";console.log(o);console.log(o);console.log(o)</script><script type=module>var a="test";console.log(a),console.log(a),console.log(a)</script>
+<script type=module>var a="test";console.log(a),console.log(a),console.log(a)</script><script>var a="test";console.log(a);console.log(a);console.log(a)</script><script type=module>var a="test";console.log(a),console.log(a),console.log(a)</script>
 
 <div>breaker</div>
-<script>var o="test";console.log(o);console.log(o);console.log(o)</script><script type=module>var a="test";console.log(a),console.log(a),console.log(a)</script><script>var o="test";console.log(o);console.log(o);console.log(o)</script>
\ No newline at end of file
+<script>var a="test";console.log(a);console.log(a);console.log(a)</script><script type=module>var a="test";console.log(a),console.log(a),console.log(a)</script><script>var a="test";console.log(a);console.log(a);console.log(a)</script>
\ No newline at end of file
diff --git a/crates/swc_html_minifier/tests/fixture/element/script/input.html b/crates/swc_html_minifier/tests/fixture/element/script/input.html
index 85d4becb9c3e..1f3a78154c8e 100644
--- a/crates/swc_html_minifier/tests/fixture/element/script/input.html
+++ b/crates/swc_html_minifier/tests/fixture/element/script/input.html
@@ -186,5 +186,30 @@ <h2>Party coffee cake recipe</h2>
     <script>window.jQuery || document.write('<script src="jquery.js"><\/script>')</script>
     <div>test</div>
     <script></script>
+    <div>topLevel - script</div>
+    <script>
+        var topLevel = function test() {
+            let foo = "bar";
+
+            if (foo) {
+                foo += "baz";
+            }
+
+            console.log(foo);
+        };
+    </script>
+    <div>topLevel - module</div>
+    <script type="module">
+        var topLevel = function test() {
+            let foo = "bar";
+
+            if (foo) {
+                foo += "baz";
+            }
+
+            console.log(foo);
+        };
+    </script>
+
 </body>
 </html>
diff --git a/crates/swc_html_minifier/tests/fixture/element/script/output.min.html b/crates/swc_html_minifier/tests/fixture/element/script/output.min.html
index ce945121482d..417e9df5121e 100644
--- a/crates/swc_html_minifier/tests/fixture/element/script/output.min.html
+++ b/crates/swc_html_minifier/tests/fixture/element/script/output.min.html
@@ -19,7 +19,7 @@
 
         </script><script id=data type=application/json>{"foo":"bar"}</script><script>
             broken    broken
-        </script><script>var a=3,a=9</script><script type=module>import t from"foo.js";let test=58800,test1="testtest"</script><script>let e=new Date;alert("Today's date is "+e)</script><script src=javascript.js>
+        </script><script>var a=3,a=9</script><script type=module>import foo from"foo.js";let test=58800,test1="testtest"</script><script>let d=new Date;alert("Today's date is "+d)</script><script src=javascript.js>
 
 
 
@@ -27,7 +27,7 @@
 
         var   q    =   "WRONG"   ;
 
-        </script><script>let t="testtest";alert("<!--");alert("<!-- foo -->");alert("-->");alert("testtest");function e(){var t=1,e=2;alert(t+" "+e)}</script><h2>Party coffee cake recipe</h2>
+        </script><script>let foo="testtest";alert("<!--");alert("<!-- foo -->");alert("-->");alert("testtest");function test(){var foo=1,bar=2;alert(foo+" "+bar)}</script><h2>Party coffee cake recipe</h2>
     <p>
         <i>by Mary Stone, 2018-03-10</i>
     </p>
@@ -42,7 +42,7 @@
     <script>alert(1)</script>
 </svg>
     <svg viewBox="0 0 10 10">
-        <script>window.addEventListener("DOMContentLoaded",()=>{function t(){let t=Math.round(255*Math.random()).toString(16).padStart(2,"0"),n=Math.round(255*Math.random()).toString(16).padStart(2,"0"),r=Math.round(255*Math.random()).toString(16).padStart(2,"0");return`#${t}${n}${r}`}document.querySelector("circle").addEventListener("click",n=>{n.target.style.fill=t()})})</script>
+        <script>window.addEventListener("DOMContentLoaded",()=>{function getColor(){let R=Math.round(255*Math.random()).toString(16).padStart(2,"0"),G=Math.round(255*Math.random()).toString(16).padStart(2,"0"),B=Math.round(255*Math.random()).toString(16).padStart(2,"0");return`#${R}${G}${B}`}document.querySelector("circle").addEventListener("click",e=>{e.target.style.fill=getColor()})})</script>
 
         <circle cx=5 cy=5 r=4 />
     </svg>
@@ -54,5 +54,10 @@
             alert('test')
         </script>
     </math>
-    <script blocking="a render">console.log("block")</script><script>(function(t){var t="test"+Math.random()+t,r=1,o=2+Math.random();alert(r+" "+o);console.log(Math.random())})("test");window.jQuery||document.write('<script src="jquery.js"><\/script>')</script>
-    <div>test</div>
\ No newline at end of file
+    <script blocking="a render">console.log("block")</script><script>(function(test){var test="test"+Math.random()+test,foo=1,bar=2+Math.random();alert(foo+" "+bar);console.log(Math.random())})("test");window.jQuery||document.write('<script src="jquery.js"><\/script>')</script>
+    <div>test</div>
+    
+    <div>topLevel - script</div>
+    <script>var topLevel=function test(){let foo="bar";if(foo){foo+="baz"}console.log(foo)}</script>
+    <div>topLevel - module</div>
+    <script type=module>var topLevel=function(){let foo="bar";foo&&(foo+="baz"),console.log(foo)}</script>
\ No newline at end of file
diff --git a/crates/swc_html_minifier/tests/fixture/text/slot-3/output.min.html b/crates/swc_html_minifier/tests/fixture/text/slot-3/output.min.html
index 4e721de55e94..4446bcc1c37b 100644
--- a/crates/swc_html_minifier/tests/fixture/text/slot-3/output.min.html
+++ b/crates/swc_html_minifier/tests/fixture/text/slot-3/output.min.html
@@ -1 +1 @@
-<!doctype html><meta charset=utf-8><title>element-details - web component using &lt;template> and &lt;slot></title><style>dl{margin-left:6px}dt{font-weight:700;color:#217ac0;font-size:110%;font-family:Consolas,"Liberation Mono",Courier}dd{margin-left:16px}</style><h1>element-details - web component using <code>&lt;template></code> and <code>&lt;slot></code></h1><template id=element-details-template-1> VALUE: !<slot>?</slot>! </template> <element-details> <span>test</span> <span>foo</span> </element-details> <script>customElements.define("element-details",class extends HTMLElement{constructor(){super();let e=document.getElementById("element-details-template-1").content;this.attachShadow({mode:"open"}).appendChild(e.cloneNode(true))}})</script>
\ No newline at end of file
+<!doctype html><meta charset=utf-8><title>element-details - web component using &lt;template> and &lt;slot></title><style>dl{margin-left:6px}dt{font-weight:700;color:#217ac0;font-size:110%;font-family:Consolas,"Liberation Mono",Courier}dd{margin-left:16px}</style><h1>element-details - web component using <code>&lt;template></code> and <code>&lt;slot></code></h1><template id=element-details-template-1> VALUE: !<slot>?</slot>! </template> <element-details> <span>test</span> <span>foo</span> </element-details> <script>customElements.define("element-details",class extends HTMLElement{constructor(){super();let template=document.getElementById("element-details-template-1").content;this.attachShadow({mode:"open"}).appendChild(template.cloneNode(true))}})</script>
\ No newline at end of file
diff --git a/crates/swc_html_minifier/tests/fixture/text/slot/output.min.html b/crates/swc_html_minifier/tests/fixture/text/slot/output.min.html
index 877312d0a282..bbaaac670339 100644
--- a/crates/swc_html_minifier/tests/fixture/text/slot/output.min.html
+++ b/crates/swc_html_minifier/tests/fixture/text/slot/output.min.html
@@ -1 +1 @@
-<!doctype html><meta charset=utf-8><title>element-details - web component using &lt;template> and &lt;slot></title><style>dl{margin-left:6px}dt{font-weight:700;color:#217ac0;font-size:110%;font-family:Consolas,"Liberation Mono",Courier}dd{margin-left:16px}</style><h1>element-details - web component using <code>&lt;template></code> and <code>&lt;slot></code></h1><template id=element-details-template-1> VALUE: <slot name=q>?</slot> </template><template id=element-details-template-2> VALUE:<slot name=q>?</slot> </template><template id=element-details-template-3><div>VALUE:</div><slot name=q>?</slot> </template> <element-details> <span slot=q>1</span> </element-details> <element-details> <span slot=q>2</span> </element-details> <element-details-more> <span slot=q>3</span> </element-details-more> <element-details-more> <span slot=q>4</span> </element-details-more> <script>customElements.define("element-details",class extends HTMLElement{constructor(){super();let e=document.getElementById("element-details-template-1").content;this.attachShadow({mode:"open"}).appendChild(e.cloneNode(true))}});customElements.define("element-details-more",class extends HTMLElement{constructor(){super();let e=document.getElementById("element-details-template-2").content;this.attachShadow({mode:"open"}).appendChild(e.cloneNode(true))}})</script>
\ No newline at end of file
+<!doctype html><meta charset=utf-8><title>element-details - web component using &lt;template> and &lt;slot></title><style>dl{margin-left:6px}dt{font-weight:700;color:#217ac0;font-size:110%;font-family:Consolas,"Liberation Mono",Courier}dd{margin-left:16px}</style><h1>element-details - web component using <code>&lt;template></code> and <code>&lt;slot></code></h1><template id=element-details-template-1> VALUE: <slot name=q>?</slot> </template><template id=element-details-template-2> VALUE:<slot name=q>?</slot> </template><template id=element-details-template-3><div>VALUE:</div><slot name=q>?</slot> </template> <element-details> <span slot=q>1</span> </element-details> <element-details> <span slot=q>2</span> </element-details> <element-details-more> <span slot=q>3</span> </element-details-more> <element-details-more> <span slot=q>4</span> </element-details-more> <script>customElements.define("element-details",class extends HTMLElement{constructor(){super();let template=document.getElementById("element-details-template-1").content;this.attachShadow({mode:"open"}).appendChild(template.cloneNode(true))}});customElements.define("element-details-more",class extends HTMLElement{constructor(){super();let template=document.getElementById("element-details-template-2").content;this.attachShadow({mode:"open"}).appendChild(template.cloneNode(true))}})</script>
\ No newline at end of file
