JSFiddle - React, Tailwind, and code Playground

HTML

<div class="flex-item flex-row2 tables-tool-option-line">
    <div class="tables-tool-option-label">Width</div>
	<div class="tables-tool-option-options-line flex-row2"><button class="width-down">-</button> <button class="width-up">+</button> <input class="width-text" type="text"></div>
</div>

CSS

.tables-tool-option-line{
    width:123px;
    overflow:hidden;
}
.flex-row2 {
    display: -webkit-flex;
    -webkit-flex-direction: row;
}
.tables-tool-option-options-line *{
    -webkit-flex:1;
}
input{
    width:5px;
}