JSFiddle - React, Tailwind, and code Playground
HTML
<div class="break-word">
<span>あいうえおかきく けこさしすせ</span>
</div>
CSS
.break-word{
width: 150px;
}
.break-word > span{
white-space: nowrap;
}
JavaScript
var splitted = $(".break-word").innerHTML().split(" ")
console.log(splitted);
$(".break-word").html(splitted)