Fix: "Module not found" error causes esbuild-loader to crash with "Ca…

…nnot read properties of undefined (reading 'useSourceMap')"
privatenumber · Jan 22, 2024 · 74c538c · 74c538c
1 parent 51685cd
commit 74c538c
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Showing 2 changed files with 14 additions and 1 deletion.
diff --git a/src/plugin.ts b/src/plugin.ts
@@ -209,7 +209,9 @@ export default class EsbuildPlugin {
 							? modules[0]
 							: (modules as Set<webpack5.Module>).values().next().value as webpack5.Module
 					);
-					useSourceMap = firstModule.useSourceMap;
+					if (firstModule) {
+						useSourceMap = firstModule.useSourceMap;
+					}
 				},
 			);
 

diff --git a/tests/specs/plugin.ts b/tests/specs/plugin.ts
@@ -545,6 +545,17 @@ export default testSuite(({ describe }, webpack: typeof webpack4 | typeof webpac
 				expect(exportedFunction('hello world')).toBe('hello world');
 				assertMinified(exportedFunction.toString());
 			});
+
+			test('can handle invalid webpack config', async () => {
+				await expect(build(
+					fixtures.blank,
+					(config) => {
+						config.entry = 'not-there.js';
+						configureEsbuildMinifyPlugin(config);
+					},
+					webpack,
+				)).resolves.toBeTruthy();
+			});
 		});
 
 		describe('CSS', ({ test }) => {