从 json 数据渲染表格后，如何根据 Datatables.js 中的条件为每个单元格着色？ [复制]

Question

var dataset = [];
var columns = sfdata.columns

sfdata.data.forEach(function (item,index) {
    var n2 = item.items
    dataset.push(n2)
});

$(document).ready(function() {
    $('#example').DataTable({
        data: dataset,
        columns: [
            { title: "index" },
            { title: "Name" }

        ]
    });
});

所以我在 spotfire 中创建了默认表，现在的问题是我如何根据条件（如果数据 [2] > 10 则背景颜色为“红色”）为列中的值着色。我实例化它错了吗？如何让它工作？

Answer 1

您是否尝试将createdRow 添加到DataTable() 调用中？

$("#example").DataTable({
  "data": dataset,
  "columns": [
    { "title": "index" },
    { "title": "Name" }
  ],
  "createdRow": (row, data, dataIndex) => {
    if(data[2] >  10)
    {
      $(row).addClass("redClass");
    }
  }
});

在 CSS 中：

.redClass
{
  background-color: red;
}

这直接来自DataTables documentation。

Answer 2

如果您想根据列设置特定单元格的样式，您必须使用带有渲染选项的 columnDefs 作为回调，目标是指您想要控制单元格的列（您也可以查看here )。

所以代码应该是这样的：

  var dataSet = [
["Tiger Nixon", 1, "Edinburgh", "5421", "2011/04/25", "$320,800"],
["Garrett Winters", 12, "Tokyo", "8422", "2011/07/25", "$170,750"],
["Ashton Cox", 4, "San Francisco", "1562", "2009/01/12", "$86,000"],
["Cedric Kelly", 5, "Edinburgh", "6224", "2012/03/29", "$433,060"],
["Airi Satou", 23, "Tokyo", "5407", "2008/11/28", "$162,700"],
["Brielle Williamson", 54, "New York", "4804", "2012/12/02", "$372,000"],
["Herrod Chandler", 2, "San Francisco", "9608", "2012/08/06", "$137,500"]
  ];

var columnDefs = [{
   title: "Name"
  }, {
    title: "Position"
  }, {
    title: "Office"
  }, {
    title: "Extn."
  }, {
    title: "Start date"
  }, {
    title: "Salary"
  }];

var myTable;

myTable = $('#example').DataTable({
   data: dataSet,
   columns: columnDefs,
   columnDefs: [{
     targets: 1, // this means controlling cells in column 1
     render: function(data, type, row, meta) { 
       if (data > 10) { // here is your condition
         return '<div class="red-color">' + data + '</div>';
       } else {
         return data;
       }
     }
   }]
 });

这是一个有效的snippet

Answer 3

你可以使用columnDefs来实现你想要的。

targets 是您要过滤掉的列号，render 是要在该列被渲染时触发的事件。所以，你有了你想要的数据，你可以根据数据过滤掉结果并应用background-color。

这里是演示。

var dataSet = [{
  index: 1,
  name: "test"
}, {
  index: 2,
  name: "test2"
}, {
  index: 3,
  name: "test3"
}];


$(document).ready(function() {
  $('#example').DataTable({
    data: dataSet,
    columns: [{
        data: "index"
      },
      {
        data: "name"
      }
    ],
    columnDefs: [{
     targets : [0],
      render: function(data, type, row) {
      
        if(row.index>2){
          return "<div style='background-color:red'>"+data+"<div>";
        }
        return data;
      }
    }]
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.datatables.net/1.10.18/js/jquery.dataTables.min.js"></script>
<link href="https://cdn.datatables.net/1.10.18/css/jquery.dataTables.min.css" rel="stylesheet" />
<table id="example" class="display" width="100%"></table>

Answer 4

$(document).ready(function() {
   var table = $('#example').DataTable({
      'ajax': 'https://api.myjson.com/bins/qgcu',
     "columnDefs": [ {
        "targets":3,
        "render": function ( data, type, row, meta ) {
         var highlight="";
         if(data==5407 || data == 1314)highlight="link"; // Put your conditions here
          return '<span class="'+highlight+'"><i class="fa fa-heart" aria-hidden="true"></i> '+data+'</span>';
        }
  } ],
  "initComplete": function(settings, json) {
    $(".link").parent().addClass("link");
  }
   });  
  
});

.link{
  color:white;
  background-color:red;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="https://cdn.datatables.net/v/dt/dt-1.10.12/datatables.min.js"></script>
<script src="https://cdn.rawgit.com/ashl1/datatables-rowsgroup/fbd569b8768155c7a9a62568e66a64115887d7d0/dataTables.rowsGroup.js"></script>
<link href="https://cdn.datatables.net/v/dt/dt-1.10.12/datatables.min.css" rel="stylesheet"/>
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.6.1/css/all.css" integrity="sha384-gfdkjb5BdAXd+lj+gudLWI+BXq4IuLW5IT+brZEZsLFm++aCMlF1V92rMkPaX4PP" crossorigin="anonymous">
<h3>jQuery DataTables - ROWSPAN in table body TBODY</h3>

<hr><br>
    
<table id="example" class="display" cellspacing="0" width="100%">
   <thead>
      <tr>
         <th>Name</th>
         <th>Position</th>
         <th>Office</th>
         <th>Extn.</th>
         <th>Start date</th>
         <th>Salary</th>
      </tr>
   </thead>
   <tfoot>
      <tr>
         <th>Name</th>
         <th>Position</th>
         <th>Office</th>
         <th>Extn.</th>
         <th>Start date</th>
         <th>Salary</th>
      </tr>
   </tfoot>
</table>

使用column.render 来实现这一点。希望这会有所帮助。