1 files changed, 4 insertions, 0 deletions

diff --git a/viewer/babel.config.js b/viewer/babel.config.js
index 162a3ea..7102a6e 100644
--- a/viewer/babel.config.js
+++ b/viewer/babel.config.js
@@ -1,3 +1,7 @@
 module.exports = {
   presets: ["@vue/cli-plugin-babel/preset"],
+  plugins: [
+    '@babel/plugin-proposal-optional-chaining',
+    '@babel/plugin-proposal-nullish-coalescing-operator',
+  ],
 };