npmコマンドがSyntaxError…{
http://shuzo-kino.hateblo.jp/entry/2015/06/13/233720
Module not found: Error: Can't resolve …パス通ってるのに!
https://qiita.com/toris-birds/items/c0874a66865f7e3a09ee
expected a string (for built-in components) or a class/function (for composite components) but got: undefined. Import Export 関係
https://teratail.com/questions/100553
型がreact.elementでないとはかれるエラー
react.development.jsの以下の行でブレークポイントはるとタイプおかしいやつ捕まえられる。
react.development.js
function createElementWithValidation(type, props, children) {
var validType = isValidElementType(type);//*************ここで型のチェックしてる
// We warn in this case but don't throw. We expect the element creation to
// succeed and there will likely be errors in render.
if (!validType) { //*************ここが捕まえやすい
var info = '';
if (type === undefined || typeof type === 'object' && type !== null && Object.keys(type).length === 0) {
info += ' You likely forgot to export your component from the file ' + "it's defined in, or you might have mixed up default and named imports.";
}