NgIf is a built-in template directive that adds or removes parts of the DOM depending on if the expression passed to it is true or false:
<div *ngIf="userHasPet">
{{ user.pet.name }}
</div>
In the above, if userHasPet is true, then the div will be included in the DOM (it will be on the page), and if userHasPet is false, the div will be removed from the DOM (it won’t be on the page).
Like with *ngFor, the * character allows to create a template and allows for a shortcut to this syntax: template=“ngIf userHasPet”.
You can also pass in a more complex expression to *ngIf:
<div *ngIf="user.name.length > 6 && user.name.length < 10">
Long name {{ user.name }}, but not too long!
</div>
Thanks for learning with the DigitalOcean Community. Check out our offerings for compute, storage, networking, and managed databases.
Alligator.io is a developer-focused resource that offers tutorials and insights on a wide range of modern front-end technologies, including Angular 2+, Vue.js, React, TypeScript, Ionic, and JavaScript.
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
Get paid to write technical tutorials and select a tech-focused charity to receive a matching donation.
Full documentation for every DigitalOcean product.
The Wave has everything you need to know about building a business, from raising funding to marketing your product.
Stay up to date by signing up for DigitalOcean’s Infrastructure as a Newsletter.
New accounts only. By submitting your email you agree to our Privacy Policy
Scale up as you grow — whether you're running one virtual machine or ten thousand.
Sign up and get $200 in credit for your first 60 days with DigitalOcean.*
*This promotional offer applies to new accounts only.