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JavaScript AngularJS Basics (1.x) Getting Started with Angular Your First Angular Directive

<hello-world></hello-world> WHY?

https://teamtreehouse.com/library/your-first-angular-directive

we wrote in the template <hello-world></hello-world> even though that we named the directive as helloWorld. Why?

To be more clear... why didn't we name the attributes AND tags as <helloWorld></helloWorld OR <div helloWorld></div>

1 Answer

Seth Kroger
Seth Kroger
56,405 Points

It's because there are two conflicting naming conventions at play here. Tag names in HTML are case-insensitive. The HTML standard specifies that custom tag names should be all lowercase with dashes for spaces, called kebab-case. Camel-cased names in custom tags can cause issues when they are rendered as HTML, but are standard for class and variable names in OOP. Angular, and a couple other frameworks, automatically converts camel-case <-> kebab-case as needed as a result.