From 469c5c0d3f0b267ff6d8fc6267341e7affa65fce Mon Sep 17 00:00:00 2001
From: likui <2218301630@qq.com>
Date: Mon, 1 Jun 2020 23:00:23 +0800
Subject: [PATCH] refactor: change `dependencies` type with `Set`

---
 src/node/utils/cssUtils.ts | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/node/utils/cssUtils.ts b/src/node/utils/cssUtils.ts
index 48d468363bec58..cff607d8d1b4a5 100644
--- a/src/node/utils/cssUtils.ts
+++ b/src/node/utils/cssUtils.ts
@@ -171,13 +171,15 @@ export function getCssImportBoundaries(
   return boundaries
 }
 
-export function recordCssImportChain(dependencies: string[], filePath: string) {
+export function recordCssImportChain(
+  dependencies: Set<string>,
+  filePath: string
+) {
   const preImportees = cssImporteeMap.get(filePath)
-  const currentImportees = new Set(dependencies)
   // if import code change, should removed unused previous importee
   if (preImportees) {
     for (const preImportee of preImportees) {
-      if (!currentImportees.has(preImportee)) {
+      if (!dependencies.has(preImportee)) {
         const importers = cssImporterMap.get(preImportee)
         if (importers) {
           importers.delete(filePath)
@@ -186,7 +188,7 @@ export function recordCssImportChain(dependencies: string[], filePath: string) {
     }
   }
 
-  currentImportees.forEach((dependency) => {
+  dependencies.forEach((dependency) => {
     if (cssImporterMap.has(dependency)) {
       cssImporterMap.get(dependency)!.add(filePath)
     } else {
@@ -194,5 +196,5 @@ export function recordCssImportChain(dependencies: string[], filePath: string) {
     }
   })
 
-  cssImporteeMap.set(filePath, currentImportees)
+  cssImporteeMap.set(filePath, dependencies)
 }