根据 ES6 中的值从数组中删除重复项

const data = [
  {id: 3,amount: 100,productId: 10,title: "Color/Red",variantChildren: Array(0)},{id: 4,amount: 5,title: "Color/Green",variantChildren: Array(2)},{amount: 0,variantChildren:{},title: "Color/Red"},variantChildren: {},title: "Color/Green"},title: "Color/Purple"},{id: 5,amount: 3,productId: 11,{id: 6,amount: 10,productId: 12,{amount: 2,];

const removeZeroamountDuplicates = arr => {
  // group items by title
  const titleItemsmap = arr.reduce((acc,item) => {
    const { title,amount } = item;
    if(acc[title]) acc[title].push(item);
    else acc[title] = [item];
    return acc;
  },{});
  // iterate over each title's items
  const res = Object.values(titleItemsmap).reduce((acc,titleItems) => {
    // if list has more than one elements remove zero-amount items,otherwise keep the only element
    const items = titleItems.length > 1
      ? titleItems.filter(item => item.amount !== 0)
      : titleItems;
    // merge items with acc
    return [...acc,...items]
  },[]);
  return res;
}

console.log( removeZeroamountDuplicates(data) );

const data = [{"id":3,"amount":100,"productId":10,"title":"Color/Red","variantChildren":[]},{"id":4,"amount":5,"title":"Color/Green","variantChildren":[null,null]},{"amount":0,"variantChildren":{},"title":"Color/Red"},"title":"Color/Green"},"title":"Color/Purple"}];

const result = Array.from(
  data.reduce((acc,o) =>
    !acc.has(o.titlE) || o.amount > 0 ? acc.set(o.title,o) : acc,new Map())
  .values()
);

console.log(result);

var unfiltered = [{amount: 0},{amount: 0},{amount: 1},{amount: 2}]
var tmpArray = [];
var filtered = unfiltered.filter((val,index,arr) => {
  var tmpTrue = !(tmpArray.map(v => v.amount).includes(val.amount))
  tmpArray.push(val)
  return tmpTrue;
});
console.log(filtered);

const array = [
    {id: 3,title: "Color/Purple"}
]

const result = array.filter((el,i) => {
    const dupIndex = array.findIndex(e => e.amount === el.amount)
    return i <= dupIndex
})

console.log(result)