How i can restrict some file formats to be upload?

Question

I am using angular file upload (nv-file-select) to upload file, now my question is how can i restrict some file formats so that user can only see files with doc/docx and xls/xlsx format.

<input type="file" nv-file-select uploader="vm.uploader"
            name="uploadFile"
            id="file1"
            ng-model="vm.fileInfo.filename"
            ng-click="vm.onFileClick()" / >

Please help me!

Answer 1

尝试这个

 <input type="file" accept=".xls,.xlsx" /> 

Answer 2

Just try with adding filters:

$scope.vm.uploader.filters.push({
    name: 'fileFormatFilter',
    fn: function(item, options) {
        var type = '|' + item.type.slice(item.type.lastIndexOf('/') + 1) + '|';
        return '|doc|docx|xls|xlsx|'.indexOf(type) !== -1;
    }
});