Environment Info: System: OS: macOS 10.14.6 CPU: (4) x64 Intel(R) Core(TM) i5-7267U CPU @ 3.10GHz Binaries: Node: 12.8.0 - /usr/local/bin/node Yarn: 1.16.0 - ~/.yarn/bin/yarn npm: 6.10.2 - /usr/local/bin/npm Browsers: Chrome: 76.0.3809.132 Firefox: Not Found Safari: 12.1.2 npmPackages: @vue/babel-helper-vue-jsx-merge-props: 1.0.0 @vue/babel-plugin-transform-vue-jsx: 1.0.0 @vue/babel-preset-app: 3.11.0 @vue/babel-preset-jsx: 1.1.0 @vue/babel-sugar-functional-vue: 1.0.0 @vue/babel-sugar-inject-h: 1.0.0 @vue/babel-sugar-v-model: 1.0.0 @vue/babel-sugar-v-on: 1.1.0 @vue/cli-overlay: 3.11.0 @vue/cli-plugin-babel: ^3.11.0 => 3.11.0 @vue/cli-service: ^3.11.0 => 3.11.0 @vue/cli-shared-utils: 3.11.0 @vue/component-compiler-utils: 3.0.0 @vue/preload-webpack-plugin: 1.1.1 @vue/web-component-wrapper: 1.2.0 typescript: ^3.2.1 => 3.6.2 vue: ^2.6.10 => 2.6.10 vue-cli-plugin-typescript: ^0.0.1 => 0.0.1 vue-hot-reload-api: 2.3.3 vue-lazyload: 1.2.3 vue-loader: 15.7.1 vue-style-loader: 4.1.2 vue-template-compiler: ^2.6.10 => 2.6.10 vue-template-es2015-compiler: 1.9.1 npmGlobalPackages: @vue/cli: 3.1.3