React组件视频学习

1.组件的样式设计
将样式封装成json对象

var letterStyle = {
        padding: 10,
        margin: 10,
        backgroundColor: "#ffde00",
        color: "#333",
        display: "inline-block",
        fontFamily: "monospace",
        fontSize: 32,
        textAlign: "center"
    }
 <div style = { letterStyle }></div>