日常js工具函数整理

数组对象中相同属性值的个数

group(arr) {
var obj = {};
if (Array.isArray(arr)) {
for (var i = 0; i < arr.length; ++i) {
var isNew = arr[i].isNew;
if (isNew in obj) obj[isNew].push(arr[i]);
else obj[isNew] = [arr[i]];
}
}
return obj;
},
max(obj) {
var ret = 0;
if (obj && typeof obj === “object”) {
for (var key in obj) {
var length = obj[key].length;
if (length > ret) ret = length;
}
}
return ret;
},
var data = [
{
addr: “1”,
isNew: false,
},
{
addr: “2”,
isNew: false,
}
]
max(group(data) // 2

检测版本是vue3

import { h } from ‘vue’;
const isVue3 = typeof h === ‘function’;
console.log(isVue3)

检测数据对象中是否有空对象

let arr = [{},{name:‘1’}]
const arr = this.bannerList.filter(item =>
item == null || item == ‘’ || JSON.stringify(item) == ‘{}’
);
console.log(arr.length > 0 ? ‘不通过’ : ‘通过’)

 

更多内容请见原文，原文转载自：https://blog.csdn.net/weixin_44519496/article/details/119946189