JSFiddle - React, Tailwind, and code Playground

HTML

<h1 class="text-basic">letter spacing in safari</h1>

CSS

@import url(http://fonts.googleapis.com/css?family=Dosis:400,300,200,500,600,700,800);
.text-basic {
    font-weight:        200;
    font-size:          16px;
    letter-spacing:     0.52em;
    line-height:        22px; font-family: 'Dosis', sans-serif;
}