ui: remove babel

packages/ui-default/build/index.js

@@ -1,7 +1,34 @@
-require('@babel/register')({
-    plugins: ['@babel/plugin-transform-runtime'],
-    presets: [['@babel/preset-env', { loose: true }]],
-});
+const esbuild = require('esbuild');
+const fs = require('fs');
+
+let transformTimeUsage = 0;
+let transformCount = 0;
+let displayTimeout;
+function transform(filename) {
+    const start = new Date();
+    const result = esbuild.buildSync({
+        entryPoints: [filename],
+        sourcemap: 'inline',
+        platform: 'node',
+        format: 'cjs',
+        target: 'node12',
+        jsx: 'transform',
+        write: false,
+    });
+    if (result.warnings.length) console.warn(result.warnings);
+    transformTimeUsage += new Date().getTime() - start.getTime();
+    transformCount++;
+    if (displayTimeout) clearTimeout(displayTimeout);
+    displayTimeout = setTimeout(() => console.log(`Transformed ${transformCount} files. (${transformTimeUsage}ms)`), 1000);
+    return result.outputFiles[0].text;
+}
+require.extensions['.js'] = function loader(module, filename) {
+    if (!filename.includes('node_modules')) {
+        return module._compile(transform(filename), filename);
+    }
+    const content = fs.readFileSync(filename, 'utf-8');
+    return module._compile(content, filename);
+};
 const main = require('./main.js');
 
 if (!module.parent) main();