Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.
SG:json-schema-editor-visual siguang.liu$ yarn build
yarn run v1.7.0
warning package.json: License should be a valid SPDX license expression
$ NODE_ENV=production webpack
/Users/siguang.liu/Downloads/json/json-schema-editor-visual/node_modules/webpack-cli/bin/config-yargs.js:89
describe: optionsSchema.definitions.output.properties.path.description,
^
TypeError: Cannot read property 'properties' of undefined
at module.exports (/Users/siguang.liu/Downloads/json/json-schema-editor-visual/node_modules/webpack-cli/bin/config-yargs.js:89:48)
at /Users/siguang.liu/Downloads/json/json-schema-editor-visual/node_modules/webpack-cli/bin/webpack.js:60:27
at Object. (/Users/siguang.liu/Downloads/json/json-schema-editor-visual/node_modules/webpack-cli/bin/webpack.js:515:3)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:20:18)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Because inputting is the main operation, if I can use keyboards to easy to complete all operations,especially add child nodes and input it,that will be better.