前端：vue3+ts，后端：koa2+jwt，实现登陆功能（前端部分）

<template>
  <div class="login-wrapper">
      <div class="modal">
          <el-form :model="user" status-icon :rules="rules" ref="userForm">
              <div class="title">火星</div>
              <el-form-item prop="username">
                  <el-input type='text' prefix-icon="el-icon-user" v-model="user.username" />
              </el-form-item>
              <el-form-item prop="password">
                  <el-input type='password' prefix-icon="el-icon-view" v-model="user.password" />
              </el-form-item>
              <el-form-item>
                  <el-button type="primary" class="btn-login" @click="login">登录</el-button>
              </el-form-item>
          </el-form>
      </div>
  </div>
</template>
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<style lang="scss">
.login-wrapper{
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #f9fcff;
  width: 100vw;
  height: 100vh;
  .modal{
    width: 500px;
    padding: 50px;
    background-color: #fff;
    border-radius: 4px;
    box-shadow: 0 0 10px 5px #ddd;
    .title{
      font-size: 50px;
      line-height: 1.5;
      text-align: center;
      margin-bottom: 30px;
    }
    .btn-login{
      width: 100%;
    }
  }
}
</style>
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<script>
export default {
  name: 'login',
  data() {
    return {
        user: {
          username: 'admin',
          password: 'admin'
        },
        rules: {
            /**
             * required: 是否输入
             * message: 提示信息
             * trigger：当失去锚点的时候，触发
             **/
          username: [
            { required: true, message: '请输入用户名', trigger: 'blur' }
          ],
          password: [
            { required: true, message: '请输入密码', trigger: 'blur' }
          ]
        }
    }
  },
  methods: {
      login() {
          this.$refs.userForm.validate(( valid ) => {
              // 当输入完成的时候，确定都输入有值
              if(valid) {
                this.$api.login(this.user).then(r => {
                    console.log(r)
                }).catch(e => {
                    console.log(e)
                })
              } else {
                return false
              }
          })
      }
  },
}
</script>
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import { createRouter, createWebHashHistory } from 'vue-router'
import Home from '@/components/Home.vue'
const routes = [
    { name: 'login', path: '/login', meta: { title: '登录' }, component: () => import('@/views/Login.vue') }
]
const router = createRouter({
    history: createWebHashHistory(),
    routes
})
export default router
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