JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <div class="left">Some Text, Repeat, Repeat, Repeat, ,Some Text, and then: </div>
    <div class="right">other Text ttt other Text tttother Text tttother Text ttt</div>
</div>

<p />

<div class="container">
    <div class="left">Some Text, Repeat, Repeat, Repeat, ,Some Text, Some Text, Repeat, Repeat, Repeat, ,Some Text,</div>
    <div class="right">other Text ttt other Text tttother Text tttother Text ttt</div>
</div>

<p />

<div class="container">
    <div class="left">Some Text, Repeat, Repeat, Repeat, ,Some Text, </div>
    <div class="right">other Text ttt</div>
</div>

CSS

.container {
    width: 600px;
}
.left {
    max-width: 100%;
    background:red;
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
    -ms-text-overflow:ellipsis;
    float: left;
}
.right {
    background:yellow;
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
    -ms-text-overflow:ellipsis;
    text-align: right;
}