Reference types when normalizing options

src/utils/options/normalizeInputOptions.ts

@@ -27,10 +27,9 @@ export interface CommandConfigObject {
 	globals: { [id: string]: string } | undefined;
 }
 
-export function normalizeInputOptions(config: InputOptions): {
-	options: NormalizedInputOptions;
-	unsetOptions: Set<string>;
-} {
+export function normalizeInputOptions(
+	config: InputOptions
+): { options: NormalizedInputOptions; unsetOptions: Set<string> } {
 	// These are options that may trigger special warnings or behaviour later
 	// if the user did not select an explicit value
 	const unsetOptions = new Set<string>();
@@ -103,7 +102,7 @@ const getAcornInjectPlugins = (
 ): NormalizedInputOptions['acornInjectPlugins'] => ensureArray(config.acornInjectPlugins);
 
 const getCache = (config: InputOptions): NormalizedInputOptions['cache'] =>
-	(config.cache as unknown as RollupBuild)?.cache || config.cache;
+	((config.cache as unknown) as RollupBuild)?.cache || config.cache;
 
 const getIdMatcher = <T extends Array<any>>(
 	option:
@@ -234,16 +233,7 @@ const getTreeshake = (
 	if (configTreeshake === false) {
 		return false;
 	}
-	if (!configTreeshake || configTreeshake === true) {
-		return {
-			annotations: true,
-			moduleSideEffects: () => true,
-			propertyReadSideEffects: true,
-			tryCatchDeoptimization: true,
-			unknownGlobalSideEffects: true
-		};
-	}
-	if (typeof configTreeshake === 'object') {
+	if (configTreeshake && typeof configTreeshake === 'object') {
 		if (typeof configTreeshake.pureExternalModules !== 'undefined') {
 			warnDeprecationWithOptions(
 				`The "treeshake.pureExternalModules" option is deprecated. The "treeshake.moduleSideEffects" option should be used instead. "treeshake.pureExternalModules: true" is equivalent to "treeshake.moduleSideEffects: 'no-external'"`,