第三次尝试

package.json

@@ -10,6 +10,7 @@
   "dependencies": {
     "core-js": "^3.6.5",
     "element-ui": "^2.15.6",
+    "paper": "^0.12.15",
     "vue": "^2.6.11"
   },
   "devDependencies": {

yarn.lock

@@ -6057,6 +6057,11 @@ pako@~1.0.5:
   resolved "https://registry.nlark.com/pako/download/pako-1.0.11.tgz#6c9599d340d54dfd3946380252a35705a6b992bf"
   integrity sha1-bJWZ00DVTf05RjgCUqNXBaa5kr8=
 
+paper@^0.12.15:
+  version "0.12.15"
+  resolved "https://registry.yarnpkg.com/paper/-/paper-0.12.15.tgz#28b5e5ce0f7a99a851e980f6715f376881dfbc84"
+  integrity sha512-9qqtcY+V0Sd2RTLZKh7rTfWDbhfitOrtq3kzgOufhGpuYpCUXM+3UIK61au14tI0F9NA4xSttDYfk376O50aPA==
+
 parallel-transform@^1.1.0:
   version "1.2.0"
   resolved "https://registry.nlark.com/parallel-transform/download/parallel-transform-1.2.0.tgz#9049ca37d6cb2182c3b1d2c720be94d14a5814fc"