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小编最近整理了一些前端经常使用的方法,以便于后期项目中用到,这些都是项目中经常用到的方法,分享给小伙伴们,大家记得点击收藏、关注、点赞哦~~~
1. 邮箱
export const isEmail = (s) => {return /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((.[a-zA-Z0-9_-]{2,3}){1,2})$/.test(s)
}
2. 手机号码
export const isMobile = (s) => {return /^1[0-9]{10}$/.test(s)
}
3. 电话号码
export const isPhone = (s) => {return /^([0-9]{3,4}-)?[0-9]{7,8}$/.test(s)
}
4. 是否字符串
export const isString = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'String'
}
5. 是否数字
export const isNumber = (o) => {return Object.prototype.toString.call(o).slice(8, -1) === 'Number'
}
6. 根据 url 地址下载
export const download = (url) => {var isChrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
var isSafari = navigator.userAgent.toLowerCase().indexOf('safari') > -1;
if (isChrome || isSafari) {var link = document.createElement('a');
link.href = url;
if (link.download !== undefined) {var fileName = url.substring(url.lastIndexOf('/') + 1, url.length);
link.download = fileName;
}
if (document.createEvent) {var e = document.createEvent('MouseEvents');
e.initEvent('click', true, true);
link.dispatchEvent(e);
return true;
}
}
if (url.indexOf('?') === -1) {url += '?download';}
window.open(url, '_self');
return true;
}
7、严格的身份证校验
export const isCardID = (sId) => {if (!/(^\d{15}$)|(^\d{17}(\d|X|x)$)/.test(sId)) {console.log('你输入的身份证长度或格式错误')
return false
}
// 身份证城市
var aCity = {11: "北京", 12: "天津", 13: "河北", 14: "山西", 15: "内蒙古", 21: "辽宁", 22: "吉林", 23: "黑龙江", 31: "上海", 32: "江苏", 33: "浙江", 34: "安徽", 35: "福建", 36: "江西", 37: "山东", 41: "河南", 42: "湖北", 43: "湖南", 44: "广东", 45: "广西", 46: "海南", 50: "重庆", 51: "四川", 52: "贵州", 53: "云南", 54: "西藏", 61: "陕西", 62: "甘肃", 63: "青海", 64: "宁夏", 65: "新疆", 71: "台湾", 81: "香港", 82: "澳门", 91: "国外"};
if (!aCity[parseInt(sId.substr(0, 2))]) {console.log('你的身份证地区非法')
return false
}
// 出生日期验证
var sBirthday = (sId.substr(6, 4) + "-" + Number(sId.substr(10, 2)) + "-" + Number(sId.substr(12, 2))).replace(/-/g, "/"),
d = new Date(sBirthday)
if (sBirthday != (d.getFullYear() + "/" + (d.getMonth() + 1) + "/" + d.getDate())) {console.log('身份证上的出生日期非法')
return false
}
// 身份证号码校验
var sum = 0,
weights = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2],
codes = "10X98765432"
for (var i = 0; i < sId.length - 1; i++) {sum += sId[i] * weights[i];
}
var last = codes[sum % 11]; // 计算出来的最后一位身份证号码
if (sId[sId.length - 1] != last) {console.log('你输入的身份证号非法')
return false
}
return true
}
8. 数组排序,{type} 1:从小到大 2:从大到小 3:随机
export const sort = (arr, type = 1) => {return arr.sort((a, b) => {switch (type) {
case 1:
return a - b;
case 2:
return b - a;
case 3:
return Math.random() - 0.5;
default:
return arr;
}
})
}
9. 去重
export const unique = (arr) => {if (Array.hasOwnProperty('from')) {return Array.from(new Set(arr));
} else {var n = {}, r = [];
for (var i = 0; i < arr.length; i++) {if (!n[arr[i]]) {n[arr[i]] = true;
r.push(arr[i]);
}
}
return r;
}
}
10. 删除其中一个元素
export const remove = (arr, ele) => {var index = arr.indexOf(ele);
if (index > -1) {arr.splice(index, 1);
}
return arr;
}
11. 字符转换,type: 1: 首字母大写 2:首字母小写 3:大小写转换 4:全部大写 5:全部小写
export const trim = (str, type) => {
type = type || 1
switch (type) {
case 1:
return str.replace(/\s+/g, "");
case 2:
return str.replace(/(^\s*)|(\s*$)/g, "");
case 3:
return str.replace(/(^\s*)/g, "");
case 4:
return str.replace(/(\s*$)/g, "");
default:
return str;
}
}
12. 最大值
export const max = (arr) => {return Math.max.apply(null, arr);
}
13. 最小值
export const min = (arr) => {return Math.min.apply(null, arr);
}
14. 求和
export const sum = (arr) => {return arr.reduce((pre, cur) => {return pre + cur})
}
15. 平均值
export const average = (arr) => {return this.sum(arr) / arr.length
}
16. 去除空格,type: 1- 所有空格 2- 前后空格 3- 前空格 4- 后空格
export const trim = (str, type) => {
type = type || 1
switch (type) {
case 1:
return str.replace(/\s+/g, "");
case 2:
return str.replace(/(^\s*)|(\s*$)/g, "");
case 3:
return str.replace(/(^\s*)/g, "");
case 4:
return str.replace(/(\s*$)/g, "");
default:
return str;
}
}
17. 判断两个对象是否键值相同
export const isObjectEqual = (a, b) => {var aProps = Object.getOwnPropertyNames(a);
var bProps = Object.getOwnPropertyNames(b);
if (aProps.length !== bProps.length) {return false;}
for (var i = 0; i < aProps.length; i++) {var propName = aProps[i];
if (a[propName] !== b[propName]) {return false;}
}
return true;
}
18. 判断一个元素是否在数组中
export const contains = (arr, val) => {return arr.indexOf(val) != -1 ? true : false;
}
19. 获取 url 参数
export const getQueryString = (name) => {const reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i');
const search = window.location.search.split('?')[1] || '';
const r = search.match(reg) || [];
return r[2];
}
20、判断类型集合
export const checkStr = (str, type) => {switch (type) {
case 'phone': // 手机号码
return /^1[3|4|5|6|7|8|9][0-9]{9}$/.test(str);
case 'tel': // 座机
return /^(0\d{2,3}-\d{7,8})(-\d{1,4})?$/.test(str);
case 'card': // 身份证
return /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/.test(str);
case 'pwd': // 密码以字母开头,长度在 6~18 之间,只能包含字母、数字和下划线
return /^[a-zA-Z]\w{5,17}$/.test(str)
case 'postal': // 邮政编码
return /[1-9]\d{5}(?!\d)/.test(str);
case 'QQ': //QQ 号
return /^[1-9][0-9]{4,9}$/.test(str);
case 'email': // 邮箱
return /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/.test(str);
case 'money': // 金额 (小数点 2 位)
return /^\d*(?:\.\d{0,2})?$/.test(str);
case 'URL': // 网址
return /(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?/.test(str)
case 'IP': //IP
return /((?:(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d)\\.){3}(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d))/.test(str);
case 'date': // 日期时间
return /^(\d{4})\-(\d{2})\-(\d{2}) (\d{2})(?:\:\d{2}|:(\d{2}):(\d{2}))$/.test(str) || /^(\d{4})\-(\d{2})\-(\d{2})$/.test(str)
case 'number': // 数字
return /^[0-9]$/.test(str);
case 'english': // 英文
return /^[a-zA-Z]+$/.test(str);
case 'chinese': // 中文
return /^[\\u4E00-\\u9FA5]+$/.test(str);
case 'lower': // 小写
return /^[a-z]+$/.test(str);
case 'upper': // 大写
return /^[A-Z]+$/.test(str);
case 'HTML': //HTML 标记
return /<("[^"]*"|'[^']*'|[^'">])*>/.test(str);
default:
return true;
}
}
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发表至: javascript
2020-05-25