Angular now supports control flow syntax (introduced in Angular 17), which allows you to write cleaner and more expressive conditional logic directly in templates. This new syntax enables functionality similar to the ngIf directive but with support for else if. Here’s how you can use it: {{a}} is greater than {{b}} {{a}} is less than {{b}}

The shorthand syntax *ngIf expands into two separate template specifications for the "then" and "else" clauses. For example, consider the following shorthand statement, that is meant to show a loading page while waiting for data to be loaded.

2023年10月18日 · NgIf allows us to show and hide content based on the state of a piece of data. We simply pass it an expression to evaluate either truthy or falsy - and the content is made created or destroyed based on the result. Learn all about Angular’s new @if and @else control flow syntax! What is NgIf? NgIf or [hidden]? What is NgIf?

2018年5月11日 · In this tutorial, we are going to take a look at the ngIf directive. We will discover how we can use it to show or hide parts of our angular application. Also, we will find out how the ngIf directive differs from using the "hidden" attribute.

How would I have multiple cases in an *ngIf statement? I'm used to Vue or Angular 1 with having an if, else if, and else, but it seems like Angular 4 only has a true (if) and false (else) condition.

2023年3月9日 · The ngIf is an angular directive, which allows us to add/remove DOM element based on some condition. learn how to use ngif else then using an examples

2019年11月10日 · We can write *ngIf else blocks by using <ng-template> element. We can use logical operators like AND (&&), OR (||), NOT (!) inside *ngIf to work with multiple conditions. We can avoid “Cannot read property of undefined” errors using *ngIf

2025年3月8日 · In Angular, we can use the ngIf else syntax, in the following way: Besides the courses.length expression, we can also pass to ngIf an else clause, that points to a template reference (the noCourses template in this case).

2023年6月14日 · Angular ngIf directive is used to conditionally include or remove an element in the HTML document. If the expression used with the ngIf directive evaluates to true, element is included in the DOM if expression evaluates to false then the element is removed from the DOM. Here are some examples of ngIf directive- 1. <div *ngIf="true"></div>

2023年5月22日 · In this article, we explored the Angular `ngIf` Else directive and learned how to use it to conditionally render content based on true/false conditions. We covered the syntax and usage of `ngIf` Else, along with examples that demonstrated its functionality.