http-captcha/captcha.js

验证码小物件

/**
 * 随机生成验证码
 * @returns  Object
 */

function create(){
    let str = '0123456789abcdeJKNBVfghiFYTUGIHKkdsfFHGHKJas'
  let one = Math.floor( Math.random() * (str.length-1-0+1)+0 )
  let two = Math.floor( Math.random() * (str.length-1-0+1)+0 )
  let three = Math.floor( Math.random() * (str.length-1-0+1)+0 )
  let four = Math.floor( Math.random() * (str.length-1-0+1)+0 )
  let text = '' + str[one] + str[two] + str[three] + str[four]  
    return {
        text,
        data: `<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
            <defs>
                <filter id="f1" x="0" y="0">
                <feGaussianBlur in="SourceGraphic" stdDeviation="15" />
                </filter>
            </defs>
            <rect width="100" height="50" stroke="green" stroke-width="3"  fill="yellow" filter="url(#f1)" />
            <text x="40" y="35" fill="blue">${text}</text>
        </svg>`
    }
}
module.exports = {
    create,
}