message: set default alt value to empty tag
diff: @@ -2,7 +2,7 @@ import React from 'react'
  import PropTypes from 'prop-types'
  import classnames from 'classnames'
  -const CircleBadge = ({alt, size = 'medium', src, bg, children}) => {
  +const CircleBadge = ({alt = "", size = 'medium', src, bg, children}) => {
  const generateContent = () => {
  if (src) {
  return <img className="CircleBadge-icon" alt={alt} src={src} />
  