[Solved] ERROR TypeError: Cannot set property ‘abc’ of undefined Angular2

by


this in the reader.onload is not the object’s context. So it haven’t any variable with name jsondata. You can use arrow function to preserve your context to the object.

reader.onload = (eve:any) => {
    this.jsondata['json_def'] = JSON.parse(eve.target.result);

    console.log(this.json_def);
}

1

solved ERROR TypeError: Cannot set property ‘abc’ of undefined Angular2