simplify

Author: Rich-Harris

packages/svelte/src/internal/client/runtime.js

@@ -1013,13 +1013,8 @@ export function update(signal, d = 1) {
 export function update_pre(signal, d = 1) {
 	var value = get(signal);
 
-	if (typeof value === 'bigint') {
-		//@ts-ignore
-		return set(signal, value + BigInt(d));
-	} else {
-		//@ts-ignore
-		return set(signal, +value + d);
-	}
+	// @ts-expect-error
+	return set(signal, d === 1 ? ++value : --value);
 }
 
 /**