<el-form-item label="图片：" prop="tempImagePath"><el-uploadclass="upload"accept="image/jpeg":show-file-list="false"list-type="picture-card":headers="{ token: token}":action="actionUrl":before-upload="beforeAvatarUpload":on-success="handleAvatarSuccess"><img v-if="temp.tempImagePath":src="temp.tempImagePath" width="146px" height="146px"/><i v-else class="el-icon-plus"></i><div slot="tip" class="el-upload__tip">只能上传.gif/.jpeg/.png文件且小于500K</div></el-upload>
</el-form-item>

 注释：

beforeAvatarUpload (file) {const imgType = file.type === 'image/jpeg' || file.type === 'image/png'const isLt500k = file.size / 1024 / 1024 < 0.48;if (!imgType) {this.$message.error("上传图片只能是 JPG和png 格式!");return false;}if (!isLt500k) {this.$message.error("上传图片大小不能超过 500k!");return false;}
},