javascript - jQuery.Deferred 异常 : Cannot read property 'split' of null TypeError: Cannot read property 'split' of null

Question

我有一个带有数据表的 Thymeleaf 模板 (1.10.15)。我定义了这个数据表:

$(document).ready(function() {  

    $('#deviceEventTable').dataTable( {
        order: [[ 0, "desc" ]],
        select: true,
        bLengthChange: false,
        stateSave: true,
        pageLength: 20,
        initComplete: function() {
            var api = this.api();
            var selected = localStorage.getItem( 'DataTables_selected' ).split(',');
            selected.forEach(function(s) {
              api.row(s).select();
            })
          }
    });


    table.on('select.dt deselect.dt', function() {
          localStorage.setItem( 'DataTables_selected', table.rows( { selected: true }).toArray() )   
        })

} );

但是当我初始化表时出现此错误:

jQuery.Deferred exception: Cannot read property 'split' of null TypeError: Cannot read property 'split' of null

Answer 1

您正在获取null来自localStorage.getItem( 'DataTables_selected' )

在执行 split() 之前尝试添加检查