javascript - 如何覆盖 JavaScript 属性

Question

以下 JavaScript 在全局范围内使用，例如它会自动插入到我的网络应用程序的每个网页中:

    <script type="text/javascript">
    $(document).ready(function() {
        $('#cemetracDataTable').dataTable( {
            "sDom": 'T<"clear">lfrtip',
            "oTableTools": {
                "sSwfPath": "http://fubar.com/wp-content/TableTools-2.1.5/media/swf/copy_csv_xls_pdf.swf",
                "aButtons": [
                    "copy",
                    "print",
                    {
                        "sExtends":    "collection",
                        "sButtonText": "Save",
                        "aButtons": [
                            {
                                "sExtends":     "csv",
                                "sButtonText":  "Excel (CSV)",
                                "bFooter":      false,
                                "sTitle":       "My title",
                                "sFileName":    "download.csv" // <-- override
                            },
                            {
                                "sExtends":     "xls",
                                "sButtonText":  "Excel (TSV)",
                                "bFooter":      false,
                                "sFileName":    "download.tsv" // <-- override
                            },
                            {
                                "sExtends":     "pdf",
                                "bFooter":      false,
                                "sFileName":    "download.pdf" // <-- override
                            }
                        ]
                    }
                ]
            }
        } ).columnFilter();
    } );
</script>

我希望能够覆盖某个网页上的 sFileName 属性，例如:

...
"sFileName":    "widgets.csv"
...
"sFileName":    "widgets.tsv"
...
"sFileName":    "widgets.pdf"

这样做可能吗？如果是这样，这将如何完成？

Answer 1

您可以使用 设置 javascript 对象属性。:

在您的案例中，与 aButtons[0].sFileName = "widgets.csv" 类似。