accommodate changes to stats/vars/warnings

site/static/workers/bundler.js

@@ -99,17 +99,18 @@ async function getBundle(mode, cache, lookup) {
 
 					const name = id.replace(/^\.\//, '').replace(/\.svelte$/, '');
 
-					const { js, css, stats } = svelte.compile(code, Object.assign({
+					const { js, stats, warnings } = svelte.compile(code, Object.assign({
 						generate: mode,
 						format: 'esm',
 						name: name,
-						filename: name + '.svelte',
+						filename: name + '.svelte'
-						onwarn: warning => {
+					}, commonCompilerOptions));
+
+					(warnings || stats.warnings).forEach(warning => { // TODO remove stats post-launch
 						console.warn(warning.message);
 						console.log(warning.frame);
 						warningCount += 1;
-						},
+					});
-					}, commonCompilerOptions));
 
 					return js;
 				}

site/static/workers/compiler.js

@@ -31,13 +31,15 @@ const commonCompilerOptions = {
 
 function compile({ source, options, entry }) {
 	try {
-		const { js, css, stats } = svelte.compile(
+		const { js, css, stats, vars } = svelte.compile(
 			source,
 			Object.assign({}, commonCompilerOptions, options)
 		);
 
+		vars = vars || stats.vars; // TODO remove this post-launch
+
 		const props = entry
-			? stats.vars.map(v => v.export_name).filter(Boolean)
+			? vars.map(v => v.export_name).filter(Boolean)
 			: null;
 
 		return { js: js.code, css: css.code, props };