Three ways to get tr td in JavaScript (graphic tutorial)-JS Tutorial-php.cn

This article mainly introduces three ways to obtain tr td using JavaScript. You can check the detailed explanation below for the specific operation steps. Interested friends can refer to it.

/* The first one, native js, first get the table and then the tr tag, and then traverse the td */

//     $(&#39;#selectIds&#39;).val("");
//      var table = document.getElementById("tb_table");//获取第一个表格 
//      var array = table.getElementsByTagName("tr");//所有tr
//      for(var i = 1; i < array.length; i++) {
//       var id = array[i].children;
//       var idtext = id[1].innerHTML;
//       if(i == 1){
//         $(&#39;#selectIds&#39;).val($(&#39;#selectIds&#39;).val() + "" + idtext); 
//       }else{
//         $(&#39;#selectIds&#39;).val($(&#39;#selectIds&#39;).val() + "," + idtext);
//       }
//       }

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/* The jQuery way of writing, get the tr and then traverse all the td . Note that the value obtained by td is .text(); */

//   $(&#39;#selectIds&#39;).val("");
//   var isFirst = true;
//    $("#tb_table").find("tr").each(function(){
//      var tdArr = $(this).children();
//      var idtext = tdArr.eq(1).text();
//      if(idtext != &#39;人员ID&#39;){
//        if(isFirst){
//        $(&#39;#selectIds&#39;).val($(&#39;#selectIds&#39;).val() + "" + idtext); 
//        isFirst = false
//        }else{
//          $(&#39;#selectIds&#39;).val($(&#39;#selectIds&#39;).val() + "," + idtext);
//        }
//      console.log("idtext",idtext);
//      }
//    })

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/* Native js obtains all rows, and then obtains each cell*/

//   var table = document.getElementById("tb_table");
//   var rows = table.rows;//获取所有行
//   console.log("lenth",rows.length) //
//   for(var i=1; i < rows.length; i++){
//     var row = rows[i];//获取每一行
//     var id = row.cells[1].innerHTML;//获取具体单元格
//     console.log("id",id)
//   }

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Summary:

$(this).children().eq(1).text() gets the displayed value

$(this).children(). eq(1).html() gets all the content between

$('.trSelected',grid).find("td").eq( 7).text(); gets the content of a selected row

Set value: $('.trSelected',grid).find("td").eq(7).text(' 'Set content'')

xxx.innerHTML; is the value of the object obtained in js.

Traverse the table

$("#grid tr").each(function() {
().eq(1).text());
});

Use JavaScript to traverse

function load(){
   var tab=document.getElementById("grid");
   var rows=tab.rows;
   alert(rows.length);
   for(var i=0;i<rows.length;i++)
   {
    for(var j=0;j<rows[i].cells.length;j++)
    {
    alert("第"+(i+1)+"行，第"+(j+1)+"列的值是:"+rows[i].cells[j].innerHTML);
    }
   }
  }

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The above is what I compiled for everyone, I hope it will be helpful to everyone in the future.

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