How to share custom text message from my angular web application to LinkedIn

I want to share custom message and URL from my angular website to LinkedIn. The below code is working fine to share URL. With this I'm not able to share any text. This shares only a link to that URL.

<a href="https://www.linkedin.com/shareArticle?mini=true&url=https://chillyfacts.com/create-linkedin-share-button-on-website-webpages&title=Create LinkedIn Share button on Website Webpages&summary=chillyfacts.com&source=Chillyfacts" onclick="window.open(this.href, 'mywin','left=20,top=20,width=500,height=500,toolbar=1,resizable=0'); return false;" ><img src="https://chillyfacts.com/wp-content/uploads/2017/06/LinkedIN.gif" alt="" width="54" height="20" /></a>

I need to share custom text message also in this same way.