svg-captcha-npmzw/index.js

仿写 svg-captcha 验证码

/**
 * 仿写svg-captcha
 * 随机生成SVG验证码
 * @returns Object
 */

// 随机数fun，   max 最大值 ，min 最小值
const random = function (max, min) {
  return Math.floor(Math.random() * (max - min + 1) + min);
};

// 随机验证码fun
const create = function () {
  let str = "0123456789zxcvbnmasdfghjklqwertyuiopZXCVBNMASDFGHJKLQWERTYUIOP";
  let one = str[random(str.length - 1, 0)];
  let two = str[random(str.length - 1, 0)];
  let three = str[random(str.length - 1, 0)];
  let four = str[random(str.length - 1, 0)];
  let text = one + two + three + four;
  return {
    text,
    data: `<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
      <text x="0" y="15" fill="red">${text}</text>`,
  };
};

module.exports = { create };