Angular SEO meta tag "http-equiv" and "httpequiv" are they the same?

I am using Angular 7 project and I want to set my meta tag

<meta http-equiv="content-language" content="en">

dynamically. So I am trying to use the angular platform-browser

import { Title, Meta } from '@angular/platform-browser';

from the original document of Angular. Then I start typing like:

constructor(private meta: Meta) { }

ngOnInit() {
  this.meta.updateTag({
    httpEquiv: 'content-language', content: this.activeLang
  });
}

It really does update my tag but it shows a bit different from the default: The default http-equiv

<meta http-equiv="content-language" content="en">

After update

<meta httpequiv="content-language" content="en">

My question: Are they the same?

Solution

Try this:

this.meta.addTag({
  'http-Equiv': 'content-language',
  'content': this.activeLang
});