Don't warn for electron-renderer target

Also try to detect all other web-like targets with Webpack 5.

Closes #134

Author: jscheid

examples/electron-renderer/README.md

@@ -0,0 +1,3 @@
+# Electron Renderer target
+
+Ensure the plugin doesn't warn for electron-renderer targets.

examples/electron-renderer/index.js

@@ -0,0 +1,13 @@
+var expect = require('expect');
+var webpackVersion = Number(
+  require('webpack/package.json').version.split('.')[0]
+);
+
+module.exports.skip = function skip() {
+  return webpackVersion < 5;
+};
+
+module.exports.check = function check(stats) {
+  expect(stats.compilation.errors).toEqual([]);
+  expect(stats.compilation.warnings).toEqual([]);
+};

examples/electron-renderer/test.js

@@ -0,0 +1,19 @@
+var SriPlugin = require('webpack-subresource-integrity');
+var HtmlWebpackPlugin = require('html-webpack-plugin');
+
+module.exports = {
+  entry: {
+    index: './index.js'
+  },
+  target: 'electron-renderer',
+  output: {
+    crossOriginLoading: 'anonymous'
+  },
+  plugins: [
+    new SriPlugin({
+      hashFuncNames: ['sha256', 'sha384'],
+      enabled: true
+    }),
+    new HtmlWebpackPlugin()
+  ]
+};

examples/electron-renderer/webpack.config.js

@@ -76,7 +76,13 @@ WebIntegrityJsonpMainTemplatePlugin.prototype.apply = function apply(
   var linkPreloadPlugin = this.addAttribute.bind(this, mainTemplate, "link");
   var addSriHashes = this.addSriHashes.bind(this, mainTemplate);
 
-  if (this.compilation.compiler.options.target !== 'web') {
+  if (
+    this.compilation.outputOptions.chunkLoading
+      ? ['require', 'async-node'].includes(
+          this.compilation.outputOptions.chunkLoading
+        )
+      : this.compilation.compiler.options.target !== 'web'
+  ) {
     this.sriPlugin.warnOnce(
       this.compilation,
       'This plugin is not useful for non-web targets.'