fix blank string

crates/swc_fast_ts_strip/src/lib.rs

@@ -86,25 +86,21 @@ pub fn operate(
     let mut ts_strip = TsStrip::default();
     program.visit_with(&mut ts_strip);
 
-    let mut replacements = ts_strip.replacements;
+    let replacements = ts_strip.replacements;
 
     if replacements.is_empty() {
         return Ok(fm.src.to_string());
     }
 
-    replacements.sort();
-
-    let mut code = String::with_capacity(fm.src.len());
-    let mut index = 0;
+    let mut code = <std::string::String as Clone>::clone(&fm.src).into_bytes();
 
     for r in replacements {
-        code.push_str(&fm.src[index..(r.0 .0 - 1) as usize]);
-        index = (r.1 .0 - 1) as usize;
+        code[(r.0 .0 - 1) as usize..(r.1 .0 - 1) as usize]
+            .iter_mut()
+            .for_each(|b| *b = b' ');
     }
 
-    code.push_str(&fm.src[index..]);
-
-    Ok(code)
+    String::from_utf8(code).map_err(|_| anyhow::anyhow!("failed to convert to utf-8"))
 }
 
 #[derive(Default)]

crates/swc_fast_ts_strip/tests/fixture/const-assertion.js

@@ -1,3 +1,3 @@
 
 
-const foo = [1, 3, 5];
+const foo = [1, 3, 5]         ;

crates/swc_fast_ts_strip/tests/fixture/declare-enum/empty.js

@@ -0,0 +1 @@
+

crates/swc_fast_ts_strip/tests/fixture/declare-enum/simple.js

@@ -0,0 +1 @@
+

crates/swc_fast_ts_strip/tests/fixture/declare-enum/with-init.js

@@ -0,0 +1 @@
+

crates/swc_fast_ts_strip/tests/fixture/instantiation-expr.js

@@ -1,3 +1,3 @@
 
 
-const foo = call
+const foo = call        

crates/swc_fast_ts_strip/tests/fixture/mixed/1.js

@@ -1,6 +1,6 @@
 const foo = {
-    foo: 1,
-    bar: "bar",
-    baz: foo,
-};
+    foo: 1          ,
+    bar: "bar"                 ,
+    baz: foo                 ,
+}                 ;
 const bar = "bar";

crates/swc_fast_ts_strip/tests/fixture/nonnull-assertion/1.js

@@ -1,2 +1,2 @@
-const foo = 1;
+const foo = 1 ;
 const bar = "bar";

crates/swc_fast_ts_strip/tests/fixture/pat-optional.js

@@ -1,9 +1,9 @@
 
 
-export function typeAnn({ a, b, c }) {
+export function typeAnn({ a, b, c }                                      ) {
     console.log(a, b, c);
 }
 
-export function optional(a) {
+export function optional(a         ) {
     console.log(a, b, c);
 }

crates/swc_fast_ts_strip/tests/fixture/satisfies/1.js

@@ -1,2 +1,2 @@
-const foo = 1;
+const foo = 1                 ;
 const bar = "bar";

crates/swc_fast_ts_strip/tests/fixture/this-param.js

@@ -1,2 +1,2 @@
-export function foo() {}
-export function bar(x) {}
+export function foo(            )       {}
+export function bar(              x        )       {}

crates/swc_fast_ts_strip/tests/fixture/type-alias/1.js

@@ -1 +1,2 @@
-export const foo = 1;
+export const foo         = 1;
+

crates/swc_fast_ts_strip/tests/fixture/type-alias/2.js

@@ -1,4 +1,4 @@
 const foo = 1;
-
-
-const bar = "bar";
+                  
+                  
+const bar      = "bar";

crates/swc_fast_ts_strip/tests/fixture/type-ann/var-decl/1.js

@@ -1,2 +1,2 @@
 const foo = 1;
-const bar = "bar";
+const bar      = "bar";

crates/swc_fast_ts_strip/tests/fixture/type-assertions/1.js

@@ -1,2 +1,2 @@
-const foo = 1;
+const foo = 1          ;
 const bar = "bar";