前端根据数据动态添加表格并计算数量

Question

{"result":"ok","list":[{"msg":"","VBELN":"","MAKTX":"MMD-AP0186MHY-C"},{""msg":"","VBELN":"","MAKTX":"MMD-AP0186MHY-C"},{"msg":"","VBELN":"","MAKTX":"MMD-AP0186MHY-C"},{"msg":"","VBELN":"","MAKTX":"MMD-AP0186MHY-C"},{"msg":"","VBELN":"","MAKTX":"MMD-AP0215MHY-C"]}

这样一条JSON数据，根据MAKTX动态生成表格，不同的MAKTX才会生成新的表格，表格里面有一个span元素叫做数量，值为这条数据中相同的MAKTX的个数，没有相同的则为1，怎么写js

Answer 1

var obj = {"result":"ok","list":[{"msg":"","VBELN":"","MAKTX":"MMD-AP0186MHY-C"},{"msg":"","VBELN":"","MAKTX":"MMD-AP0186MHY-C"},{"msg":"","VBELN":"","MAKTX":"MMD-AP0186MHY-C"},{"msg":"","VBELN":"","MAKTX":"MMD-AP0186MHY-C"},{"msg":"","VBELN":"","MAKTX":"MMD-AP0215MHY-C"}]}

var map = new Map()
obj.list.forEach(i => {
    map.set(i.MAKTX, (map.get(i.MAKTX) || 0) + 1)
})
var num = Math.max.apply(null, [...map.values()])
console.log('num', num) // 4