error TS7008: Member ‘summary’ implicitly has an ‘any’ type

Perhaps you changed the value of the noImplicitAny attribute in your TypeScript compiler configuration… See the tsconfig.json file:

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false // <-----
  },
  "exclude": [
    "node_modules",
    "typings/main",
    "typings/main.d.ts"
  ]
}

You could try to add a type on your property. Something like:

@Input() summary:string;