chore: support transform nullish

Author: John60676

babel.config.js

@@ -1,5 +1,8 @@
 const presets = ['@babel/preset-env'];
-const plugins = ['@vue/babel-plugin-jsx'];
+const plugins = [
+  '@vue/babel-plugin-jsx',
+  '@babel/plugin-proposal-nullish-coalescing-operator',
+];
 
 const babelConfig = {
   presets,

package.json

@@ -55,6 +55,7 @@
   },
   "devDependencies": {
     "@babel/core": "^7.12.3",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "^7.14.5",
     "@babel/plugin-transform-runtime": "^7.12.1",
     "@babel/preset-env": "^7.12.1",
     "@babel/runtime-corejs3": "^7.12.5",

yarn.lock

@@ -187,6 +187,11 @@
   resolved "https://registry.yarnpkg.com/@babel/helper-plugin-utils/-/helper-plugin-utils-7.13.0.tgz#806526ce125aed03373bc416a828321e3a6a33af"
   integrity sha512-ZPafIPSwzUlAoWT8DKs1W2VyF2gOWthGd5NGFMsBcMMol+ZhK+EQY/e6V96poa6PA/Bh+C9plWN0hXO1uB8AfQ==
 
+"@babel/helper-plugin-utils@^7.14.5":
+  version "7.14.5"
+  resolved "https://registry.yarnpkg.com/@babel/helper-plugin-utils/-/helper-plugin-utils-7.14.5.tgz#5ac822ce97eec46741ab70a517971e443a70c5a9"
+  integrity sha512-/37qQCE3K0vvZKwoK4XU/irIJQdIfCJuhU5eKnNxpFDsOkgFaUAwbv+RYw6eYgsC0E4hS7r5KqGULUogqui0fQ==
+
 "@babel/helper-remap-async-to-generator@^7.13.0":
   version "7.13.0"
   resolved "https://registry.yarnpkg.com/@babel/helper-remap-async-to-generator/-/helper-remap-async-to-generator-7.13.0.tgz#376a760d9f7b4b2077a9dd05aa9c3927cadb2209"
@@ -360,6 +365,14 @@
     "@babel/helper-plugin-utils" "^7.13.0"
     "@babel/plugin-syntax-nullish-coalescing-operator" "^7.8.3"
 
+"@babel/plugin-proposal-nullish-coalescing-operator@^7.14.5":
+  version "7.14.5"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-nullish-coalescing-operator/-/plugin-proposal-nullish-coalescing-operator-7.14.5.tgz#ee38589ce00e2cc59b299ec3ea406fcd3a0fdaf6"
+  integrity sha512-gun/SOnMqjSb98Nkaq2rTKMwervfdAoz6NphdY0vTfuzMfryj+tDGb2n6UkDKwez+Y8PZDhE3D143v6Gepp4Hg==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.14.5"
+    "@babel/plugin-syntax-nullish-coalescing-operator" "^7.8.3"
+
 "@babel/plugin-proposal-numeric-separator@^7.12.13":
   version "7.12.13"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-numeric-separator/-/plugin-proposal-numeric-separator-7.12.13.tgz#bd9da3188e787b5120b4f9d465a8261ce67ed1db"