打印值：
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>测试</title>
</head>
<body>
</body>
<script type="text/javascript">
var res = [
[{
"key": "颜色",
"value": "黑色"
},
{
"key": "容量",
"value": "32G"
}
],
[{
"key": "颜色",
"value": "黑色"
},
{
"key": "容量",
"value": "64G"
}
],
[{
"key": "颜色",
"value": "白色"
},
{
"key": "容量",
"value": "32G"
}
],
[{
"key": "颜色",
"value": "白色"
},
{
"key": "容量",
"value": "64G"
}
],
];
var arr1 = []; // 存放所有key（去重后的）
var arr2 = []; // 组合成想要的格式
for (var i = 0; i < res.length; i++) {
for (var j = 0; j < res[i].length; j++) {
if (!arr1.includes(res[i][j].key)) {
arr1.push(res[i][j].key);
}
}
}
for (var i = 0; i < arr1.length; i++) {
var obj = {
"key": arr1[i],
"value": []
};
arr2.push(obj);
}
// 赋值
for (var i = 0; i < res.length; i++) {
for (var j = 0; j < res[i].length; j++) {
for (var k = 0; k < arr2.length; k++) {
if (res[i][j].key == arr2[k].key) {
if (!arr2[k].value.includes(res[i][j].value)) {
arr2[k].value.push(res[i][j].value);
}
}
}
}
}
console.log(res,'整体数据');
console.log(arr2,'处理后的数据');
</script>
</html>