Merge pull request #87 from tauling/esbuild_0.18

Adding support for esbuild 0.18 and live reloading

assets/elm/build.js

@@ -1,15 +1,36 @@
 const esbuild = require('esbuild');
 const ElmPlugin = require('esbuild-plugin-elm');
 
-esbuild.build({
-  entryPoints: ['src/index.js'],
-  bundle: true,
-  outdir: '../js',
-  watch: process.argv.includes('--watch'),
-  plugins: [
-    ElmPlugin({
-      debug: true,
-      clearOnWatch: true,
-    }),
-  ],
-}).catch(_e => process.exit(1))
+const isProduction = process.env.MIX_ENV === "prod"
+
+async function watch() {
+  const ctx = await esbuild.context({
+    entryPoints: ['src/index.js'],
+    bundle: true,
+    outfile: '../js/elm.js',
+    plugins: [
+      ElmPlugin({
+        debug: true
+      }),
+    ],
+  }).catch(_e => process.exit(1))
+  await ctx.watch()
+}
+
+
+async function build() {
+  await esbuild.build({
+    entryPoints: ['src/index.js'],
+    bundle: true,
+    minify: true,
+    outfile: '../js/elm.js',
+    plugins: [
+      ElmPlugin(),
+    ],
+  }).catch(_e => process.exit(1))
+}
+
+if (isProduction)
+  build()
+else
+  watch()