Sometimes *ngIf doesn't function as expected

File: PageNotFoundComponent.ts

import { FormsModule, NgModel } from '@angular/forms';
import { ChangeDetectorRef, Component, ElementRef, OnInit, Renderer2, ViewChild, ViewEncapsulation } from '@angular/core';
import {CommonModule} from '@angular/common';
import {NgModule} from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { element } from 'protractor';
import { SplitButtonModule } from "primeng/primeng";
import { Router } from '@angular/router';

@Component({
  selector: 'app-page-not-found',
  templateUrl: './page-not-found.component.html',
  styleUrls: ['./page-not-found.component.css']
})
export class PageNotFoundComponent implements OnInit {

  constructor() { }

  ngOnInit() {
  }

}

page-not-found.component.html

<p *ngif=true>
  page-not-found works!
</p>

Issue with *ngif directive. Attempted system restart and cache clearance, yet error persists:

Uncaught Error: Template parse errors:
Property binding ngif not recognized by any directive in embedded template. Ensure correct spelling and all directives listed in "@NgModule.declarations". ("[ERROR->]<p *ngif=true>
  page-not-found works!
</p>

Answer №1

To display the message "page-not-found works!", use the code below:

<p *ngIf="true">
  page-not-found works!
</p>

Remember to use *ngIf and not *ngif.

Answer №2

When working with angular syntax like *ngIf, [value=], or (change), it is important to wrap the opposite end of the equation in quotes. This informs angular to search for the value in the component. To ensure this functionality, it is recommended to create a field in your component like:

truthy = true;

Then you can use it as follows:

<p *ngIf="truthy">
  page-not-found works!
</p>

Failing to wrap it in quotes will cause angular to interpret it as a string literal, potentially leading to undesired outcomes.

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