fileinput pdf编辑初始化预览
var $fileLinkInput = $('#file_link_full');
$fileLinkInput.fileinput({language: 'zh',uploadUrl: '<?php echo Yii::$app->urlManager->createUrl(['file/image', 'type' => 'work_file']);?>',initialPreview: [defaultFile],initialPreviewAsData: true,initialPreviewFileType: 'pdf',allowedFileExtensions: ['docx', 'doc', 'pdf'],overwriteInitial: false,maxFileSize: 10000,maxFilesNum: 1,slugCallback: function (filename) {return filename.replace('(', '_').replace(']', '_');}
});