Dynamic Creation of table tables using JavaScript

Dynamic Creation of table tables using JavaScript
Introduction:

The original table was written by ourselves. We did not write it in the body label, so it was generated through the code in JavaScript:

Method 1:

The original method creates one-to-one elements.
Var a1 = document. createElement (table );
Var a2 = document. createElement (tbody );
Var a3 = document. createElement (tr );
Var a4 = document. createElement (td );
// Start appendchild () to append each element.
A3.appendChild (a4 );
A2.appendChild (a3 );
A1.appendChild (a2 );

 

Method 2:

Use the functions contained in the table object: Insert rows and insert Columns

Var tabNode = document. createElement (table );
Var trNode = tabNode. insertRow ();
Var tdNode = trNode. insertCell;
TabNode. innerHTML = This is created using the functions in the table object.

Note: using the original method, a tbody object must be added when createElement is created.

// Obtain

Sibling node of the tag
// Var node3 = tabnode. previussibling; // The previous node obtains the reference of the previous sibling object of this object.
// Alert (previous -- node3: + node3); // # text
// If There is a carriage return character. Later versions of IE and Firefox will be recognized as "blank text" # text,
// In earlier versions, IE will directly go beyond ----- not only The same is true for other nodes.
// Table, There is actually a tag-Table body hidden between the tag and the tag.

 

 

Dynamic Creation and deletion:

Create a table by entering the following values:

 

Function createTable () {tableNode = document. createElement (table); // obtain the tableNode object. setAttribute (id, table) var row = parseInt (document. getElementsByName (row1) [0]. value); // obtain the row number // alert (row); if (row <= 0 | isNaN (row) {alert (the entered row number is incorrect, and the table cannot be created, enter again :); return;} var cols = parseInt (document. getElementsByName (cols1) [0]. value); if (isNaN (cols) | cols <= 0) {alert (the entered column number is incorrect. You cannot create a table. Please enter it again :); return ;} // The preceding figure shows how to create for (var x = 0; x
 
  
 
Delete row:
  
Function delRow () {// to delete a row, you must obtain the table object to delete the row. Therefore, you must set the table Object id when creating the table object to facilitate the var tab = document operation. getElementById (table); // obtain the table object if (tab = null) {alert (the deleted table does not exist !) Return;} var rows = parseInt (document. getElementsByName (delrow1) [0]. value); // obtain the object to be deleted if (isNaN (rows) {alert (the input row is incorrect. Enter the row to be deleted ...); Return;} if (rows >=1 & rows <= tab. rows. length) {tab. deleteRow (rows-1);} else {alert (the deleted row does not exist !!); Return ;}}
Delete column:
  
// It is troublesome to delete a column. You need to delete the cells in a row through the rows. // the length of a row is the number of columns. // tab. rows [x]. deleteCell (cols-1) function delCols () {// obtain the table object var tab = document. getElementById (table); if (tab = null) {alert (the deleted table does not exist !!); Return;} // obtain the content var cols = parseInt (document. getElementsByName (delcols1) [0]. value); // check for reliability if (isNaN (cols) {alert (incorrect input. Enter the column to be output ..); Return;} if (! (Cols> = 1 & cols
   
    
Complete code:
    

    
    <Script type = text/javascript> var tableNode; function createTable () {tableNode = document. createElement (table); // obtain the tableNode object. setAttribute (id, table) var row = parseInt (document. getElementsByName (row1) [0]. value); // obtain the row number // alert (row); if (row <= 0 | isNaN (row) {alert (the entered row number is incorrect, and the table cannot be created, enter again :); return;} var cols = parseInt (document. getElementsByName (cols1) [0]. value); if (isNaN (cols) | cols <= 0) {alert (the entered column number is incorrect. You cannot create a table. Please enter it again :); return ;} // The preceding figure shows how to create for (var x = 0; x
    
     
= 1 & rows <= tab. rows. length) {tab. deleteRow (rows-1);} else {alert (the deleted row does not exist !!); Return;} // it is more difficult to delete a column. The length of cells in a row is the number of columns. // tab. rows [x]. deleteCell (cols-1) function delCols () {// obtain the table object var tab = document. getElementById (table); if (tab = null) {alert (the deleted table does not exist !!); Return;} // obtain the content var cols = parseInt (document. getElementsByName (delcols1) [0]. value); // check for reliability if (isNaN (cols) {alert (incorrect input. Enter the column to be output ..); Return;} if (! (Cols> = 1 & cols
     Column:
      
     
     

      
     
     

      
     
     
 
    
   
  
   
Demo: