The excel export exportOptions trim property not working

"buttons": [
                {
                    extend: 'excelHtml5',
                    title: $(".companyName").text(),
                    filename: $('#reportTitle').text().trim(),
                    "createEmptyCells" : true,
                    sheetName: excelSheetName,
                    messageTop: $(".stdReportTitle").text(),    
                        exportOptions: {
                                        trim : false;
                                    }
                    customize: function( xlsx ) {   
                                       // my code
                                    }
                            }
];

The trim property not working. I want to excel exported cell content with empty spaces before text;
Ex:
Cell sting is " text"

Please help me. The cell contents are trimmed by default when i export