From acb207d03c59c3a203b34f46fbbf8e3ff8273329 Mon Sep 17 00:00:00 2001
From: OJ Kwon <kwon.ohjoong@gmail.com>
Date: Sat, 25 May 2019 15:52:14 -0700
Subject: [PATCH] feat(target): support electron preload async chunk loading

---
 declarations/WebpackOptions.d.ts |  3 ++-
 lib/WebpackOptionsApply.js       | 12 ++++++++++--
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/declarations/WebpackOptions.d.ts b/declarations/WebpackOptions.d.ts
index 7e45ddbd437..d2408e18456 100644
--- a/declarations/WebpackOptions.d.ts
+++ b/declarations/WebpackOptions.d.ts
@@ -390,7 +390,8 @@ export interface WebpackOptions {
 				| "async-node"
 				| "node-webkit"
 				| "electron-main"
-				| "electron-renderer")
+				| "electron-renderer"
+				| "electron-preload")
 		| ((compiler: import("../lib/Compiler")) => void);
 	/**
 	 * Enter watch mode, which rebuilds on file change.
diff --git a/lib/WebpackOptionsApply.js b/lib/WebpackOptionsApply.js
index ff4601cee16..32a813e42b0 100644
--- a/lib/WebpackOptionsApply.js
+++ b/lib/WebpackOptionsApply.js
@@ -156,11 +156,19 @@ class WebpackOptionsApply extends OptionsApply {
 					new LoaderTargetPlugin(options.target).apply(compiler);
 					break;
 				case "electron-renderer":
-					JsonpTemplatePlugin = require("./web/JsonpTemplatePlugin");
+				case "electron-preload":
 					FetchCompileWasmTemplatePlugin = require("./web/FetchCompileWasmTemplatePlugin");
 					NodeTargetPlugin = require("./node/NodeTargetPlugin");
 					ExternalsPlugin = require("./ExternalsPlugin");
-					new JsonpTemplatePlugin().apply(compiler);
+					if (options.target === "electron-renderer") {
+						JsonpTemplatePlugin = require("./web/JsonpTemplatePlugin");
+						new JsonpTemplatePlugin().apply(compiler);
+					} else if (options.target === "electron-preload") {
+						NodeTemplatePlugin = require("./node/NodeTemplatePlugin");
+						new NodeTemplatePlugin({
+							asyncChunkLoading: true
+						}).apply(compiler);
+					}
 					new FetchCompileWasmTemplatePlugin({
 						mangleImports: options.optimization.mangleWasmImports
 					}).apply(compiler);