非常简单的解决方案与JavaScript的过滤器功能:

Var a1 = ['a'， 'b']; Var a2 = ['a'， 'b'， 'c'， 'd']; (arr1, arr2) { var newArr = []; var myArr = ar1 .concat(arr2); newArr = myArr.filter(函数(项){ return arr2.indexOf(item) < 0 || arr1.indexOf(item) < 0; })； 警报(newArr); ｝ diffArray (a1, a2);

下面是一个稍微修改的版本，它使用Object来存储哈希，可以处理数组中的数字和字符串。

function arrDiff(a, b) {
  const hash = {};
  a.forEach(n => { hash[n] = n; });
  b.forEach(n => {
    if (hash[n]) {
      delete hash[n];
    } else {
      hash[n] = n;
    }
  });
  return Object.values(hash);
}

数据:

var new_storage = JSON.parse('[{"id_order":"0003"},{"id_order":"0004"},{"id_order":"0006"}]');

var old_storage = JSON.parse('[{"id_order":"0001"},{"id_order":"0002"},{"id_order":"0003"},{"id_order":"0004"},{"id_order":"0005"}]');

使用过滤器:

var diff = new_storage
.filter(x => {if(!(old_storage.filter(y => y.id_order==x.id_order)).length){return x}})
    .concat(old_storage
    .filter(x => {if(!(new_storage.filter(y => y.id_order==x.id_order)).length){return x}})
                       ) 

console.log(JSON.stringify(diff))

两个数组的结果不同

[{"id_order":"0006"},{"id_order":"0001"},{"id_order":"0002"},{"id_order":"0005"}]

为了获得对称差异，您需要以两种方式比较数组(或在多个数组的情况下以所有方式比较)

ES7 (ECMAScript 2016)

// diff between just two arrays:
function arrayDiff(a, b) {
    return [
        ...a.filter(x => !b.includes(x)),
        ...b.filter(x => !a.includes(x))
    ];
}

// diff between multiple arrays:
function arrayDiff(...arrays) {
    return [].concat(...arrays.map( (arr, i) => {
        const others = arrays.slice(0);
        others.splice(i, 1);
        const unique = [...new Set([].concat(...others))];
        return arr.filter(x => !unique.includes(x));
    }));
}

ES6(2015年ECMAScript)

// diff between just two arrays:
function arrayDiff(a, b) {
    return [
        ...a.filter(x => b.indexOf(x) === -1),
        ...b.filter(x => a.indexOf(x) === -1)
    ];
}

// diff between multiple arrays:
function arrayDiff(...arrays) {
    return [].concat(...arrays.map( (arr, i) => {
        const others = arrays.slice(0);
        others.splice(i, 1);
        const unique = [...new Set([].concat(...others))];
        return arr.filter(x => unique.indexOf(x) === -1);
    }));
}

ES5 (ECMAScript 5.1)

// diff between just two arrays:
function arrayDiff(a, b) {
    var arrays = Array.prototype.slice.call(arguments);
    var diff = [];

    arrays.forEach(function(arr, i) {
        var other = i === 1 ? a : b;
        arr.forEach(function(x) {
            if (other.indexOf(x) === -1) {
                diff.push(x);
            }
        });
    })

    return diff;
}

// diff between multiple arrays:
function arrayDiff() {
    var arrays = Array.prototype.slice.call(arguments);
    var diff = [];

    arrays.forEach(function(arr, i) {
        var others = arrays.slice(0);
        others.splice(i, 1);
        var otherValues = Array.prototype.concat.apply([], others);
        var unique = otherValues.filter(function (x, j) { 
            return otherValues.indexOf(x) === j; 
        });
        diff = diff.concat(arr.filter(x => unique.indexOf(x) === -1));
    });
    return diff;
}

例子:

// diff between two arrays:
const a = ['a', 'd', 'e'];
const b = ['a', 'b', 'c', 'd'];
arrayDiff(a, b); // (3) ["e", "b", "c"]

// diff between multiple arrays
const a = ['b', 'c', 'd', 'e', 'g'];
const b = ['a', 'b'];
const c = ['a', 'e', 'f'];
arrayDiff(a, b, c); // (4) ["c", "d", "g", "f"]

对象数组之间的差异

function arrayDiffByKey(key, ...arrays) {
    return [].concat(...arrays.map( (arr, i) => {
        const others = arrays.slice(0);
        others.splice(i, 1);
        const unique = [...new Set([].concat(...others))];
        return arr.filter( x =>
            !unique.some(y => x[key] === y[key])
        );
    }));
}

例子:

const a = [{k:1}, {k:2}, {k:3}];
const b = [{k:1}, {k:4}, {k:5}, {k:6}];
const c = [{k:3}, {k:5}, {k:7}];
arrayDiffByKey('k', a, b, c); // (4) [{k:2}, {k:4}, {k:6}, {k:7}]

我同意@luis-sieira的解决方案

我创建了位自解释函数，便于初学者一步一步理解:

function difference(oneArr, twoArr){
  var newArr = [];
  newArr = oneArr.filter((item)=>{
      return !twoArr.includes(item)
  });
  console.log(newArr)
    let arr = twoArr.filter((item)=>{
        return !oneArr.includes(item)
     });
    newArr =  newArr.concat(arr);
  console.log(newArr)
}
difference([1, 2, 3, 5], [1, 2, 3, 4, 5])

var result = [];
var arr1 = [1,2,3,4];
var arr2 = [2,3];
arr1.forEach(function(el, idx) {
    function unEqual(element, index, array) {
        var a = el;
        return (element!=a);
    }
    if (arr2.every(unEqual)) {
        result.push(el);
    };
});
alert(result);