/**
* @description: 校验身份证
* @param {*}
* @return {*}
*/
export const validateIDCard = value => /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/.test(value);
/**
* @description: 校验支付宝账号
* @param {*}
* @return {*}
*/
export const validateAlipay = value => /^1\d{10}$|^[a-zA-Z\d._-]*\@[a-zA-Z\d.-]{1,10}\.[a-zA-Z\d]{1,20}$/.test(value);
/**
* @description: 校验银行卡
* @param {*}
* @return {*}
*/
export const validateBankCode = value => /^\d{13,19}$/.test(value);
/**
* @description: 校验手机号
* @param {*}
* @return {*}
*/
export const validatePhone = value => /^1\d{10}$/.test(value);
/**
* @description: 函数节流
* @param {*}
* @return {*}
*/
export const throttle = function (fn, delay = 1000) {
let prev = 0;
return function () {
const now = Date.now();
if (now - prev > delay) {
fn.apply(this, arguments);
prev = Date.now();
}
}
}
/**
* @description: 获取随机字符串
* @param {*}
* @return {*}
*/
export const randomString = () => Math.random().toString(36).substr(2);
/**
* @description: 将 BASE64 转换文件
* @param {*}
* @return {*}
*/
export const dataURLtoFile = (dataurl, filename) => {
const arr = dataurl.split(',');
const mime = arr[0].match(/:(.*?);/)[1];
if (!filename) filename = `${Date.parse(new Date())}.jpg`;
const bstr = window.atob(arr[1]);
let n = bstr.length;
const u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new File([u8arr], filename, { type: mime });
}
/**
* @description: 压缩图片
* @param {*}
* @return {*}
*/
export const compressImg = file => {
const fileSize = parseFloat(Number.parseInt(file.size, 10) / 1024 / 1024).toFixed(2);
const reader = new FileReader();
reader.readAsDataURL(file);
return new Promise((resolve) => {
reader.onload = e => {
const img = new Image();
img.src = e.target.result;
img.onload = () => {
const w = img.width;
const h = img.height;
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
let base64;
canvas.setAttribute('width', w);
canvas.setAttribute('height', h);
ctx.drawImage(img, 0, 0, w, h);
if (fileSize <= 1) {
base64 = canvas.toDataURL(file.type, 1);
} else if (fileSize <= 3) {
base64 = canvas.toDataURL(file.type, 0.8);
} else if (fileSize <= 5) {
base64 = canvas.toDataURL(file.type, 0.5);
} else {
base64 = canvas.toDataURL(file.type, 0.1);
}
let fileName = file.name;
fileName = fileName.replace(/^(.+)\.(.+)$/, (fullName, name, suffix) => name + Math.floor(Math.random() * (9999 - 1000) + 1000) + '.' + suffix);
resolve(dataURLtoFile(base64, fileName));
};
};
});
}
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