Upload应该可以限制文件数量

[bowencool]

• I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

新选择的文件与已存在列表里的文件的个数总和超出限制，brforeUpload返回false，文件仍然会被添加进列表。

What does the proposed API look like?

组件内部提供api，限制个数

[wangxueliang]

可以使用 fileList 对列表进行完全控制啊
ps: 希望能提供你遇到的问题demo(https://codesandbox.io/s/2wpk21kzvr)，更有利于定位问题

[bowencool]

虽然已经做好了，但还是觉得不够易用，所以就来提了个issue

[bowencool]

顺带一提，还有file.size同理

[bowencool]

   beforeUpload(file, fileList) {
      if (file.size > SIZE_LIMIT) {
        this.$message.warning('请选择小于3M的图片');
        return false;
      }
      return true;
    },
    handleChange({ fileList, file, event }) {
      if (file.size > SIZE_LIMIT) {
        return;
      }
      const newList = [...fileList];
      if (fileList.length > COUNT_LIMIT) {
        newList.length = COUNT_LIMIT;
        this.$message.warning(`最多${COUNT_LIMIT}张图`);
      }
      this.fileList = newList;
    },

这里去重就很难受了。。。

[tangjinzhou]

结合状态来做提示

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