使用 JavaScript 获得价值

Question

Iam trying to get td values in tr with id=jf and push there values into an array but when to get this array it just store the first td valuse and others array elements are Undefined

<table id="customers" >
            <tr id="jf">
            <td>Students Name</td>
            <td>Students SSN</td>
            <td>Class</td>
            <td>First</td>
            <td>Second</td>
            <td>third</td>
            <td>Final</td>
            </tr>
</table>
<button id='addr' onclick='addnewr()'> Add </button>
<script>
var count_td_def=document.getElementById("jf").cells;
function insertdata()
{
    var tdvs=[];

    for(var j=0;j<count_td_def.length;j++)
    {

        var tdv=document.getElementById("jf").cells[j].innerHTML;
        tdvs.push(tdv[j]);
        alert(tdvs[j])
    }

}
</script>

Answer 1

You can use document.getElementById to get the row and querySelectorAll('td') to get the td . Then use map to create an array of the text

 function insertdata() { var tdv = [...document.getElementById("jf").querySelectorAll('td')].map((item) => { return item.innerHTML }) console.log(tdv) }

 td { border: 1px solid black; }

 <table id="customers"> <tr id="jf"> <td>Students Name</td> <td>Students SSN</td> <td>Class</td> <td>First</td> <td>Second</td> <td>third</td> <td>Final</td> </tr> </table> <button id='addr' onclick='insertdata()'> Add </button>