I try to add new row on myTable by javaScript, but when I want to check some checkbox to deleteRows, the count of rows by name = 0, but new checkBox are correct.
var row = document.getElementsByName("mytr"); >>>>>>> equal 0 ,, but
var checkboxchild = document.getElementsByName("checkall"); >>>>> correct if I add 4 checkbox, the length is 4
for(var i=1;i<=checkboxchild.length;i++)
{
if(checkboxchild[i].checked == true)
{
row[i].remove(); // Here my error : 'undefined' is null or not an object
}
}
I tried this ( or Mytable.deleteRow[i] ), no errors found, but not work.
/*** FUNCTION TO ADD ROW ***/
function addSampleRow(id) {
/*** We get the table object based on given id ***/
var objTable = document.getElementById(id);
/*** We insert the row by specifying the current rows length ***/
var objRow = objTable.insertRow(objTable.rows.length);
/*** We insert the first row cell ***/
var objCell1 = objRow.insertCell(0);
/*** We insert a checkbox object ***/
var objInputCheckBox = document.createElement("input");
objInputCheckBox.type = "checkbox";
objCell1.appendChild(objInputCheckBox);
/*** We insert the second row cell ***/
var objCell2 = objRow.insertCell(1);
var currentDate = new Date()
/*** We add some text inside the celll ***/
objCell2.innerHTML = "You add me on " + currentDate.getHours() + ":" + currentDate.getMinutes() + ":" + currentDate.getSeconds();
}
/*** FUNCTION TO DELETE ROW ***/
function removeSampleRow(id) {
/***We get the table object based on given id ***/
var objTable = document.getElementById(id);
/*** Get the current row length ***/
var iRow = objTable.rows.length;
/*** Initial row counter ***/
var counter = 0;
/*** Performing a loop inside the table ***/
if (objTable.rows.length > 1) {
for (var i = 0; i < objTable.rows.length; i++) {
/*** Get checkbox object ***/
var chk = objTable.rows[i].cells[0].childNodes[0];
if (chk.checked) {
/*** if checked we del ***/
objTable.deleteRow(i);
iRow--;
i--;
counter = counter + 1;
}
}
/*** Alert user if there is now row is selected to be deleted ***/
if (counter == 0) {
alert("Please select the row that you want to delete.");
}
}else{
/*** Alert user if there are no rows being added ***/
alert("There are no rows being added");
}
}
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when I add new row by javascript appendChild, the rows count =0
Jan 01, 2017 01:54 PM|Khalid Salameh|LINK
Hello,
I try to add new row on myTable by javaScript, but when I want to check some checkbox to deleteRows, the count of rows by name = 0, but new checkBox are correct.
var row = document.getElementsByName("mytr"); >>>>>>> equal 0 ,, but var checkboxchild = document.getElementsByName("checkall"); >>>>> correct if I add 4 checkbox, the length is 4 for(var i=1;i<=checkboxchild.length;i++) { if(checkboxchild[i].checked == true) { row[i].remove(); // Here my error : 'undefined' is null or not an object } }I tried this ( or Mytable.deleteRow[i] ), no errors found, but not work.
thank you.
All-Star
52101 Points
23232 Posts
Re: when I add new row by javascript appendChild, the rows count =0
Jan 01, 2017 03:08 PM|mgebhard|LINK
The name attribute does not apply to a table row (tr).
https://developer.mozilla.org/en-US/docs/Web/API/Element/name
Use instead a class, Id, or data- attribute to select table rows.
Contributor
2990 Points
1210 Posts
Re: when I add new row by javascript appendChild, the rows count =0
Feb 11, 2017 04:32 AM|Deepak Panchal|LINK
Hi Khalid Salam...
please refer code below may help you.
/*** FUNCTION TO ADD ROW ***/ function addSampleRow(id) { /*** We get the table object based on given id ***/ var objTable = document.getElementById(id); /*** We insert the row by specifying the current rows length ***/ var objRow = objTable.insertRow(objTable.rows.length); /*** We insert the first row cell ***/ var objCell1 = objRow.insertCell(0); /*** We insert a checkbox object ***/ var objInputCheckBox = document.createElement("input"); objInputCheckBox.type = "checkbox"; objCell1.appendChild(objInputCheckBox); /*** We insert the second row cell ***/ var objCell2 = objRow.insertCell(1); var currentDate = new Date() /*** We add some text inside the celll ***/ objCell2.innerHTML = "You add me on " + currentDate.getHours() + ":" + currentDate.getMinutes() + ":" + currentDate.getSeconds(); } /*** FUNCTION TO DELETE ROW ***/ function removeSampleRow(id) { /***We get the table object based on given id ***/ var objTable = document.getElementById(id); /*** Get the current row length ***/ var iRow = objTable.rows.length; /*** Initial row counter ***/ var counter = 0; /*** Performing a loop inside the table ***/ if (objTable.rows.length > 1) { for (var i = 0; i < objTable.rows.length; i++) { /*** Get checkbox object ***/ var chk = objTable.rows[i].cells[0].childNodes[0]; if (chk.checked) { /*** if checked we del ***/ objTable.deleteRow(i); iRow--; i--; counter = counter + 1; } } /*** Alert user if there is now row is selected to be deleted ***/ if (counter == 0) { alert("Please select the row that you want to delete."); } }else{ /*** Alert user if there are no rows being added ***/ alert("There are no rows being added"); } }HTML Code:
<p> <input type="button" id="btnAdd" value="Add Sample Row" onclick="addSampleRow('tblSample')"> <input type="button" id="btnDelete" value="Delete Selected Rows" onclick="removeSampleRow('tblSample')"> </p> <table id="tblSample" border="1" cellspacing="2" cellpadding="10"> <tr> <td>Checkbox</td> <td>Sample value</td> </tr> </table>Output:
Reference:
How to add and delete a table row in javascript
Regards
Deepak
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