feat(build/serve): add process.env.IS_ELECTRON, fixes #181

Author: nklayman

__tests__/webpackConfig.spec.js

@@ -91,6 +91,24 @@ describe('chainWebpack', () => {
       expect(config.toConfig()).toEqual(new Config().toConfig())
     }
   )
+
+  test.each([true, false])(
+    'process.env.IS_ELECTRON is set properly',
+    async isElectron => {
+      // Set build mode (Electron or other)
+      if (isElectron) {
+        process.env.IS_ELECTRON = true
+      } else {
+        delete process.env.IS_ELECTRON
+      }
+      const config = mockChain()
+      // Definition is set accordingly
+      expect(
+        config.plugin('define').toConfig().definitions['process.env']
+          .IS_ELECTRON
+      )[`toBe${isElectron ? 'Truthy' : 'Falsy'}`]()
+    }
+  )
 })
 
 describe.each(['production', 'development'])('getExternals in %s', env => {

lib/webpackConfig.js

@@ -12,6 +12,11 @@ async function chainWebpack (api, pluginOptions, config) {
       .target('electron-renderer')
       .node.set('__dirname', false)
       .set('__filename', false)
+    // Set IS_ELECTRON
+    config.plugin('define').tap(args => {
+      args[0]['process.env'].IS_ELECTRON = true
+      return args
+    })
     if (process.env.NODE_ENV === 'production') {
       //   Set process.env.BASE_URL and __static to absolute file path
       config.plugin('define').tap(args => {