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/**
* @description 添加单位
* @param {String | Number} value 值 100
* @param {String} unit 单位 px em rem
*/
export const addUnit = (value: string | number, unit = 'px') => {
return !Object.is(Number(value), NaN) ? `${value}${unit}` : value
}
/**
* @description 树转数组,队列实现广度优先遍历
* @param {Array} data 数据
* @param {Object} props `{ children: 'children' }`
*/
export const treeToArray = (data: any[], props = { children: 'children' }) => {
data = JSON.parse(JSON.stringify(data))
const { children } = props
const newData = []
const queue: any[] = []
data.forEach((child: any) => queue.push(child))
while (queue.length) {
const item: any = queue.shift()
if (item[children]) {
item[children].forEach((child: any) => queue.push(child))
delete item[children]
}
newData.push(item)
}
return newData
}
/**
* @description 获取正确的路经
* @param {String} path 数据
*/
export function getNormalPath(path: string) {
if (path.length === 0 || !path || path == 'undefined') {
return path
}
const newPath = path.replace('//', '/')
const length = newPath.length
if (newPath[length - 1] === '/') {
return newPath.slice(0, length - 1)
}
return newPath
}
//加法函数,用来得到精确的加法结果
//说明:javascript的加法结果会有误差,在两个浮点数相加的时候会比较明显。这个函数返回较为精确的加法结果。
//返回值:arg1加上arg2的精确结果
export function Add(arg1: number, arg2: number) {
arg2 = parseFloat(arg2)
var r1, r2, m
try {
r1 = arg1.toString().split('.')[1].length
} catch (e) {
r1 = 0
}
try {
r2 = arg2.toString().split('.')[1].length
} catch (e) {
r2 = 0
}
m = Math.pow(100, Math.max(r1, r2))
return (Mul(arg1, m) + Mul(arg2, m)) / m
}
//乘法函数,用来得到精确的乘法结果
//说明:javascript的乘法结果会有误差,在两个浮点数相乘的时候会比较明显。这个函数返回较为精确的乘法结果。
//返回值:arg1乘以arg2的精确结果
export function Mul(arg1: number | string, arg2: number | string) {
arg1 = parseFloat(arg1)
arg2 = parseFloat(arg2)
var m = 0,
s1 = arg1.toString(),
s2 = arg2.toString()
try {
m += s1.split('.')[1].length
} catch (e) {}
try {
m += s2.split('.')[1].length
} catch (e) {}
return (Number(s1.replace('.', '')) * Number(s2.replace('.', ''))) / Math.pow(10, m)
}
//除法函数,用来得到精确的除法结果
//说明:javascript的除法结果会有误差,在两个浮点数相除的时候会比较明显。这个函数返回较为精确的除法结果。
//调用:$h.Div(arg1,arg2)
//返回值:arg1除以arg2的精确结果
export function Div(arg1: number | string, arg2: number | string) {
arg1 = parseFloat(arg1);
arg2 = parseFloat(arg2);
var t1 = 0,
t2 = 0,
r1, r2;
try {
t1 = arg1.toString().split(".")[1].length;
} catch (e) {}
try {
t2 = arg2.toString().split(".")[1].length;
} catch (e) {}
r1 = Number(arg1.toString().replace(".", ""));
r2 = Number(arg2.toString().replace(".", ""));
return Mul(r1 / r2, Math.pow(10, t2 - t1));
}
/**
* 将字符串转换为布尔值
* @param s
*/
export function stringToBool(s: string): boolean {
if (s.toLowerCase() === 'true' || s === '1') {
return true
} else if (s.toLowerCase() === 'false' || s === '0') {
return false
} else {
return false
}
}
/**
* Base64 转换为 Blob 对象的辅助函数
* @param s
*/
export function b64toBlob(base64: string) {
const byteCharacters = atob(base64.split(',')[1]);
const byteArrays = [];
for (let offset = 0; offset < byteCharacters.length; offset += 512) {
const slice = byteCharacters.slice(offset, offset + 512);
const byteNumbers = new Array(slice.length);
for (let i = 0; i < slice.length; i++) {
byteNumbers[i] = slice.charCodeAt(i);
}
const byteArray = new Uint8Array(byteNumbers);
byteArrays.push(byteArray);
}
return new Blob(byteArrays, { type: 'image/png' });
}
/**
* 函数防抖 (只执行最后一次点击)
* @param fn
* @returns {Function}
* @constructor
*/
export const Debounce = (fn:any, t:any) => {
const delay = t || 500
let timer
return function () {
const args = arguments
if (timer) {
clearTimeout(timer)
}
timer = setTimeout(() => {
timer = null
fn.apply(this, args)
}, delay)
}
}
/**优惠券展示的使用有效期均根据今天进行判断,
* 没到使用期的展示「开始日期-结束日期 有效」,
* 已经可以使用的展示「有效期至 结束日期」
* @param startTime
* @param endTime
*/
export const getCouponTime = (startTime: string, endTime: string) => {
let start:number = new Date(startTime).getTime()
let newTime:number = Date.now()
let reg:RegExp = new RegExp('-', 'g') //g代表全部
if (newTime < start) {
return startTime.slice(0, 16).replace(reg, '.') + ' ~ ' + endTime.slice(0, 16).replace(reg, '.') + ' 可用'
} else {
return '有效期至 ' + endTime.slice(0, 16).replace(reg, '.')
}
}
/**
* 页面路由跳转
* @param url 跳转地址
* @param query 携带参数
* @param replace 是否刷新页面
*/
export const linkNavigateTo = (url: string, params = {}, replace: boolean = false): void => {
navigateTo(
{
path: url,
query: params,
},
{
replace: replace,
},
)
}