ExtJs GridPanel 给表格行或者单元格自定义样式

        Ext.onReady(function(){
            Ext.create('Ext.data.Store', {
                storeId:'simpsonsStore',
                fields:['name', 'email', 'phone'],
                data:{'items':[
                    { 'name': 'Lisa',  "email":"lisa@simpsons.com",  "phone":"555-111-1224"  },
                    { 'name': 'Bart',  "email":"bart@simpsons.com",  "phone":"555-222-1234" },
                    { 'name': 'Homer', "email":"home@simpsons.com",  "phone":"555-222-1244"  },
                    { 'name': 'Marge', "email":"marge@simpsons.com", "phone":"555-222-1254"  }
                ]},
                proxy: {
                    type: 'memory',
                    reader: {
                        type: 'json',
                        root: 'items'
                    }
                }
            });

            Ext.create('Ext.grid.Panel', {
                title: 'Simpsons',
                store: Ext.data.StoreManager.lookup('simpsonsStore'),
                columns: [
                    { text: 'Name',  dataIndex: 'name' },
                    { text: 'Email', dataIndex: 'email', flex: 1 },
                    { text: 'Phone', dataIndex: 'phone' }
                ],
                height: 200,
                width: 400,
                renderTo: Ext.getBody(),
                viewConfig: {
                    //这里可以根据我们自己的逻辑给表格添加样式
                    getRowClass: function(record, rowIndex, rowParams, store){
                        return "tasks-completed-task";
                    }
                },
            });
        });

        //给行添加样式
        .tasks-completed-task {
            color:#fb223a;
        }
        //行内单元格添加样式
        .tasks-completed-task .x-grid-cell {
            text-decoration: line-through;
            color: gray;
        }

.tasks-completed-task .x-grid-cell(这种写法是CSS 样式 子元素选择器)

意思是 父容器的CSS = tasks-completed-task 子元素的css = x-grid-cell 才会生效