Angular 2: Error when trying to npm start

Question

This is the log:

node_modules/@angular/router/src/config.d.ts(255,17): error TS1110: Type expected.
node_modules/@angular/router/src/config.d.ts(256,15): error TS1109: Expression expected.
node_modules/@angular/router/src/config.d.ts(257,16): error TS1109: Expression expected.
node_modules/@angular/router/src/config.d.ts(258,12): error TS1109: Expression expected.
node_modules/@angular/router/src/config.d.ts(259,17): error TS1109: Expression expected.
node_modules/@angular/router/src/config.d.ts(260,19): error TS1109: Expression expected.
node_modules/@angular/router/src/config.d.ts(261,10): error TS1109: Expression expected.
node_modules/@angular/router/src/config.d.ts(262,13): error TS1109: Expression expected.
node_modules/@angular/router/src/config.d.ts(263,14): error TS1109: Expression expected.
node_modules/@angular/router/src/config.d.ts(264,1): error TS1128: Declaration or statement expected.

Answer 1

I Had this error after re-install, this steps help for me:

1. replace new version of node_modules folder with the previous version (I saved backup...)

2. run npm start

3. replace previous version of node_modules folder to the new version.

after that npm start work with new version perfectly. It seems like bug of npm... I hope this help.