markdown 编辑器 md编辑器
腾讯开源的 markdown 编辑器 https://github.com/Tencent/cherry-markdown字节跳动开源的 markdown 编辑器 https://github.com/bytedance/bytemd
分类 JS 下的文章
文件处理
1、base64转file对象let imageBase64
let blob = dataURLtoBlob(imageBase64)
let file = blobToFile(blob, Date.now() + '.png')
dataURLtoBlob(dataurl) {
var arr = dataurl.split(','),
mime = arr[0].match(/:(.*?);/)[1],
bstr = atob(arr[1]),
...
文字高亮
const regex = new RegExp(searchContent, "gi");
return text.replace(regex,'<span style="color:#286CFB;">$&</span>');
浏览器麦克风使用
<button type="button" id="start-btn">开始录音</button>
<button type="button" id="stop-btn">停止录音</button>
<button type="button" id="play-btn">播放录音</button>const startBtn = do...
非对称加密(node-rsa,jsencrypt)
公钥私钥生成随便找个在线生成的http://www.metools.info/code/c80.htmlORconst NodeRSA = require('node-rsa')
const fs = require('fs')
const newkey = new NodeRSA({ b: 512 })
newkey.setOptions({ encryptionScheme: 'pkcs1' })
let public_key = newkey.exportKey('pkcs8-public') //公钥
let private_key =...
Twitter_Snowflake(雪花算法)
import bigInt from 'big-integer';
// http://peterolson.github.io/BigInteger.js/
/**
* Twitter_Snowflake(雪花算法)
*
* SnowFlake的结构如下(共64bits，每部分用-分开):
* 0 - 0000000000 0000000000 0000000000 0000000000 0 - 00000 - 00000 - 000000000000
* | ----------------------|--------...
decimal.js 加减乘除
import Decimal from 'decimal.js';
// 加法
function add(...nums: number[]): number {
return nums.reduce((total, num) => new Decimal(total).plus(num), 0).toNumber();
}
// 减法
function subtract(...nums: number[]): number {
return nums.reduce((total, num) => new Decimal(t...
storage封装
/***
* title: storage.js
* Author: wish
* Email: -
* Time: 2022/7/25 21:32
* last: 2022/7/25 21:54
* Desc: 对存储的简单封装
*/
import CryptoJS from 'crypto-js';
// 十六位十六进制数作为密钥
const SECRET_KEY = CryptoJS.enc.Utf8.parse("3333e6e143439161");
// 十六位十六进制数作为密钥偏移量
const SECRET_IV...
数字千分位
num = 12345.45678
num.toLocaleString('en-US',{minimumFractionDigits:5})
minimumFractionDigits：保留小数几位
JS修改input的value触发change事件
var inp = document.querySelector('input');
var ev = new Event('input', { bubbles: true });
ev.simulated = true;
inp.value = 'new value'
inp.dispatchEvent(ev);
JS生成字母A-Z
var arr = [];
for(var i = 65; i < 91; i++){
arr.push(String.fromCharCode(i));
}
return arr;
多级目录将数据递归成树状
let data = [
{ id: 1, name: "电器", parentid: 0 },
{ id: 2, name: "日用品", parentid: 0 },
{ id: 3, name: "车用品", parentid: 0 },
{ id: 4, name: "电饭煲", parentid: 1 },
{ id: 5, name: "毛巾", parentid: 2 },
{ id: 6, name: "雨刷器", parentid: 3 },
{ id: 7, nam...
时间API
苏宁:
https://f.m.suning.com/api/ct.do
or
http://quan.suning.com/getSysTime.do
{
"api": "time",
"code": "1",
"currentTime": 1647506518039,
"msg": ""
}
or
{
"sysTime2": "2022-03-17 16:46:39",
"sysTime1": "20220317164639"
}
淘宝:
http://api.m.taoba...
JS计算两个日期相差天数
function Start(startDateString, endDateString) {
var startDate = Date.parse(startDateString);
var endDate = Date.parse(endDateString);
if (startDate > endDate) {
return 0;
}
if (startDate == endDate) {
return -1; //相等
}
var days = (endDate - startDate) / ...
微信机器人PC
https://github.com/cixingguangming55555/wechat-bot在PC端使用工具注入DLL,后台会启动一个WevSocket,实时发送消息.通过监听对呀的消息做处理
1900年至2100年公历、农历互转Js代码
/**公历年月日转农历数据 返回json**/
calendar.solar2lunar(2000,8,23);
/**农历年月日转公历年月日**/
calendar.lunar2solar(2000,7,24);Animal: "龙"
IDayCn: "廿四"
IMonthCn: "七月"
Term: "处暑"
astro: "处女座"
cDay: 23
cMonth: 8
cYear: 2000
gzDay: "癸丑"
gzMonth: "甲申"
gzYear: "庚辰"
isLeap: false
isTerm: true
isToday: ...
NodeJs抓取页面
npm i cheerio request iconv-lite思路：通过 request 获取到页面。在使用 iconv-lite 编译数据。在使用 cheerio 拿到对应的元素。这里以抓取微博热搜为例const cheerio = require('cheerio');
const request = require('request');
const iconv = require('iconv-lite');
function http(url, decode = 'utf8') {
return new Promise((res...
随机数
function getRandom(start, end, fixed = 0) {
let differ = end - start
let random = Math.random()
return (start + differ * random).toFixed(fixed)
}getRandom(1,5) 1<= num >=5
保存图片文件，下载图片
function downloadIamge(imgsrc, name) { //下载图片地址和图片名
let image = new Image();
// 解决跨域 Canvas 污染问题
image.setAttribute("crossOrigin", "anonymous");
image.onload = function () {
let canvas = document.createElement("canvas");
...
赛邮云通信SUBMAIL
NodeJs发送短信var request = require('request');
let post = function (url, postdata) {
let options = {
url: url,
formData: postdata
};
return new Promise(function (resolve, reject) {
request.post(options, function (err, response, body) {
...