小白，请教各位大佬！if判断如何使用对象的方式优化?感激不尽

Question

if的代码如何优化到最简
if(res.OrderInfo.OrderItems.GoodsSource==='JD'){
res.OrderInfo.OrderItems.GoodsSource='京东';
}elseif(res.OrderInfo.OrderItems.GoodsSource==='SF'){
res.OrderInfo.OrderItems.GoodsSource='顺丰';
}elseif(res.OrderInfo.OrderItems.GoodsSource==='SELF'){
res.OrderInfo.OrderItems.GoodsSource='商户自营';
}

Answer 1

constMAP={'JD':'京东','SF':'顺丰','SELF':'商户自营'}res.OrderInfo.OrderItems.GoodsSource=MAP[res.OrderInfo.OrderItems.GoodsSource]||'未知'