some useful npm packages
Some functions used to replace Eval By calculate expression:Addition, subtraction, multiplication and division of multi-level brackets,negative
https://www.npmjs.com/package/wecal
random some verifyCodes
https://www.npmjs.com/package/weverifycode
calculate one day to the Gregorian calendar and lunar calendar
https://www.npmjs.com/package/wecalendar
trans img object or img url to base64
https://www.npmjs.com/package/weimgtobase64
compress img by canvas
https://www.npmjs.com/package/weimgcompress
do some useful validator
https://www.npmjs.com/package/wewevalidator