How can i check similarity of news articles in ionic 3

Hi , AOA everyone , can anybody help me , i,m building an ionic app in which i,m showing articles from different news links and other websites using an API. basically it is my FYP and they ask me to add something like i have to check similarity of the articles and remove the same articles from the search result or to show thaat this article is similar to the other… it is urgent … please help me :pensive: