基础逻辑链 JS基础

1.GET方法 :
发送一个请求获取服务器上的某一处资源

2.post方法 向url指定的资源提交数据或附加新的数据

3.安装axios

npm install axios

 //链表
var reverseList = function (head) {
    let prev = null;
    let curr = head;
    while (curr) {
        const next = curr.next;
        curr.next = prev;
        prev = curr;
        curr = next;
    }
    return prev
};

上传图片

 <el-upload
      name="headfile"
      class="avatar-uploader"
      action="http://vueshop.glbuys.com/api/user/myinfo/formdatahead?token=1ec949a15fb709370f"
      :show-file-list="false"
      :on-success="handleAvatarSuccess"
      :before-upload="beforeAvatarUpload"
    >
      <img v-if="imageUrl" :src="imageUrl" class="avatar" />
      <i v-else class="el-icon-plus avatar-uploader-icon"></i>
      添加图片
    </el-upload>
    
    
    
          //事件
     handleAvatarSuccess(res, file) {
      this.imageUrl = URL.createObjectURL(file.raw);
      if (file.response.data.msbox) {
        this.$emit(
          "ImgUrl",
          "http://vueshop.glbuys.com/userfiles/head/" + file.response.data.msbox
        );
      }
    },
    beforeAvatarUpload(file) {
      const isJPG = file.type === "image/jpeg";
      const isLt2M = file.size / 1024 / 1024 < 2;

      if (!isJPG) {
        this.$message.error("上传头像图片只能是 JPG 格式!");
      }
      if (!isLt2M) {
        this.$message.error("上传头像图片大小不能超过 2MB!");
      }
      return isJPG && isLt2M;
    },