How to make such an angle in CSS or vue

injection:

If there is some property in the CSS to create such an angle as in the layout

The program itself does not specify this property in the tab
I tried to search there
!:

>Solution :

You can simply use clip-path css property, and here is an example:

.square{
  clip-path: polygon(80% 0%, 100% 20%, 100% 80%, 0% 80%, 0 0);
  
  background-color:dodgerblue;
  width:200px;
  height:200px;
}

<div class="square"></div>

clip-path: polygon(80% 0%, 100% 20%, 100% 80%, 0% 80%, 0 0);

for more info about this property MDN clip-path