JSFiddle - React, Tailwind, and code Playground

HTML

<div className="form-group form-inline">
                                    <label style="margin-right:100px">Category</label>
                                    <select className="form-control" value={this.state.selectCategoryValue} onChange={this.handleSelectCat} style={{display:'inline-block'}}>
                                        <option value="defaultCategory" disabled selected></option>
                                        {categoryDesc}
                                    </select>
                                </div>