Merge pull request #22 from rollup/gh-17

squelch css warnings if css: false

Author: Rich-Harris

src/index.js

@@ -184,7 +184,11 @@ export default function svelte(options = {}) {
 			const compiled = compile(
 				code,
 				Object.assign({}, {
-					onwarn: warning => this.warn(warning),
+					onwarn: warning => {
+						// TODO replace this with warning.code, post sveltejs/svelte#824
+						if (options.css === false && warning.message === 'Unused CSS selector') return;
+						this.warn(warning);
+					},
 					onerror: error => this.error(error)
 				}, fixedOptions, {
 					name: capitalize(sanitize(id)),

test/test.js

@@ -112,4 +112,24 @@ describe('rollup-plugin-svelte', () => {
 			});
 		});
 	});
+
+	it('squelches CSS warnings if css: false', () => {
+		const { transform } = plugin({
+			css: false,
+			cascade: false
+		});
+
+		transform.call({
+			warn: warning => {
+				throw new Error(warning.message);
+			}
+		}, `
+			<div></div>
+			<style>
+				.unused {
+					color: red;
+				}
+			</style>
+		`, 'test.html');
+	});
 });