Fix the compiler arguments

build.gradle.kts

@@ -17,6 +17,15 @@ dependencies {
 kotlin {
     js(IR) {
         moduleName = "Username404_Website"
+        compilations.all {
+            with(kotlinOptions) {
+                freeCompilerArgs = freeCompilerArgs + listOf(
+                    "-Xopt-in=kotlin.RequiresOptIn",
+                    "-Xopt-in=kotlin.js.ExperimentalJsExport",
+                    "-progressive"
+                )
+            }
+        }
         browser {
             webpackTask {
                 output.libraryTarget = "global"
@@ -37,9 +46,3 @@ kotlin {
         binaries.executable()
     }
 }
-
-tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile::class) {
-    with(kotlinOptions) {
-        freeCompilerArgs = listOf("-Xopt-in=kotlin.RequiresOptIn", "-progressive")
-    }
-}

src/main/kotlin/main.kt

@@ -1,4 +1,3 @@
-@file:OptIn(ExperimentalJsExport::class)
 package fr.username404.website
 
 import kotlinx.browser.document