/**
 * 是否合法IP地址
 * @param value
 * @param callback
 */
export function validateIP(rule, value, callback) {
  if (value === '' || typeof value === 'undefined' || value == null) {
    callback(new Error('请输入正确的IP地址'))
  } else {
    const reg = /^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$/
    if ((!reg.test(value)) && value !== '') {
      callback(new Error('请输入正确的IP地址'))
    } else {
      callback()
    }
  }
}

2.表单校验

rules: {
  ip: [
    { required: true, message: '请输入正确的IP地址', validator: this.validateIP, trigger: 'blur' }
  ]
 }