Can't bind to 'ngif' since it isn't a known property of 'p'. code example

Example 1: Can't bind to 'ngModel' since it isn't a known property of 'input'.

import { FormsModule } from '@angular/forms';

[...]

@NgModule({
  imports: [
    [...]
    FormsModule
  ],
  [...]
})

Example 2: core.js:7813 Can't bind to 'ngIf' since it isn't a known property of 'div'

import { CommonModule } from '@angular/common';  
import { BrowserModule } from '@angular/platform-browser';

Example 3: Can't bind to 'ngModel' since it isn't a known property of 'input'.ng

if we want to implement form in agular we need to add 'FormsModule' in app-module.ts imports: section

Example 4: core.js:7813 Can't bind to 'ngIf' since it isn't a known property of 'div'

@NgModule({
    imports: [CommonModule],
    declarations: [MyComponent]
  ...
})
class MyComponentModule {}