将下划线格式化为驼峰命名方式

 数组对象格式化

const newData = this.selectData.map(e=> {
     const item = this.formatKey(e)
     return item
 })

formatKey(obj) {
     const keys = Object.keys(obj);
     const newObj = {};
     keys.forEach(key => {
         const camelCaseKey = key.replace(/_([a-z])/g, (m, p1) => p1.toUpperCase());
         newObj[camelCaseKey] = obj[key];
     });
     return newObj;
 },

 对象格式化

const newData = {};
for (const [key, value] of Object.entries(this.selectData[0])) {
    const newKey = key.replace(/_([a-z])/g, (_, letter) => letter.toUpperCase());
    newData[newKey] = value;
}