JSFiddle - React, Tailwind, and code Playground

HTML

<h1><span contenteditable>Title</span></h1>

CSS

*, *:before, *:after {
    box-sizing: border-box;
    -moz-box-sizing: border-box;
}
h1 {
    margin: 100px;
    display: inline-block;
    text-align:center;
    padding: 6px 52px;
    border: 3px solid black;
    position: relative;
    
}
h1 span:before, h1 span:after {
    content: "";
    height: 90%;
    margin-top: 2px;
    width: 70px;
    border: 3px solid black;
    position: absolute;
    top: 0;
}
h1 span:before {
    right: 100%;
    border-left: 0 none;
}
h1 span:after {
    left: 100%;
    border-right: 0 none;
}

h1:before, h1:after {
    content: "";
    height: 31px;
    width: 31px;
    margin-top: 8px;
    position: absolute;
    top: 0;
    -ms-transform: rotate(45deg);
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
}

h1:before {
    border-top: 3px solid black;
    border-right: 3px solid black;
    right: calc(100% + 70px - 16px);
}
h1:after {
    border-bottom: 3px solid black;
    border-left: 3px solid black;
    left: calc(100% + 70px - 16px);
}