常用js方法记录 欢迎私信补充添加，相互学习

生成随机颜色

const generateRandomHexColor = () =>
\`#${Math.floor(Math.random() \* 0xffffff) .toString(16)}\`;

滚动到顶部

const scrollToTop = (element) =>
element.scrollIntoView({ behavior: "smooth", block: "start" })

数组乱序

const shuffleArray = (arr) => arr.sort(() => Math.random() - 0.5) 。
// 测试
const arr = \[1, 2, 3, 4, 5, 6, 7, 8, 9, 10\];
console.log(shuffleArray(arr))

下载文件方法记录

//请求方法

export const Generate = (data) => {
return request({
url: '/download',
method: 'post',
data,
responseType: 'blob'
})
}
let data = await Generate ({
fileName: 'userTemplate.xlsx'
})
// 提取文件名
// const fileName = data.headers['content-disposition'].match(
// /filename=(.*)/
// )[1]
const blob = new Blob([data.data], { type: 'application/octet-stream' })
// 创建新的URL并指向File对象或者Blob对象的地址
const blobURL = window.URL.createObjectURL(blob)
// 创建a标签，用于跳转至下载链接
const tempLink = document.createElement('a')
tempLink.style.display = 'none'
tempLink.href = blobURL
tempLink.setAttribute('download', '模板.xlsx')
// 兼容：某些浏览器不支持HTML5的download属性
if (typeof tempLink.download === 'undefined') {
tempLink.setAttribute('target', '_blank')
}
// 挂载a标签
document.body.appendChild(tempLink)
tempLink.click()
document.body.removeChild(tempLink)
// 释放blob URL地址
window.URL.revokeObjectURL(blobURL)

处理日期格式

export function parseTime(time: any, pattern: string) {
    if (arguments.length === 0 || !time) {
        return null
    }
    const format = pattern || '{y}-{m}-{d} {h}:{i}:{s}'
    let date
    if (typeof time === 'object') {
        date = time
    } else {
        if ((typeof time === 'string') && (/^[0-9]+$/.test(time))) {
            time = parseInt(time)
        } else if (typeof time === 'string') {
            time = time.replace(new RegExp(/\//gm), '-')
        }
        if ((typeof time === 'number') && (time.toString().length === 10)) {
            time = time * 1000
        }
        date = new Date(time)
    }

    const formatObj = {
        y: date.getFullYear(),
        m: date.getMonth() + 1,
        d: date.getDate(),
        h: date.getHours(),
        i: date.getMinutes(),
        s: date.getSeconds(),
        a: date.getDay()
    } as any
    const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/ig, (result, key) => {
        let value = formatObj[key]
        // Note: getDay() returns 0 on Sunday
        if (key === 'a') {
            return ['日', '一', '二', '三', '四', '五', '六'][value]
        }
        if (result.length > 0 && value < 10) {
            value = '0' + value
        }
        return value || 0
    })
    return time_str{y}-{m}-{d}
}
//调用方式 
parseTime(new Date(),'{y}-{m}-{d}')