How to Extract Data from HTML Tables in JavaScript?

Retrieving Data from HTML Tables in JavaScript

Iterating through table rows and cells is essential for extracting data from HTML tables in JavaScript. Here's how to accomplish this in a comprehensive manner:

1. Iterate Through All Table Rows:

Use the rows property of the table element to access individual rows. The following example illustrates how to loop through all table rows:

var table = document.getElementById("mytab1");
for (var i = 0, row; row = table.rows[i]; i++) {
    // Access current row using the 'row' variable
}

2. Iterate Through Columns of Each Row:

Within each row, utilize the cells property to retrieve the table cells. The following snippet demonstrates how to iterate through columns for each row:

for (var i = 0, row; row = table.rows[i]; i++) {
    for (var j = 0, col; col = row.cells[j]; j++) {
        // Access current cell using the 'col' variable
    }
}

3. Iterating Through Only Table Cells:

If row identification is not critical, you can directly iterate through all table cells using the cells property of the table element:

for (var i = 0, cell; cell = table.cells[i]; i++) {
    // Access current cell using the 'cell' variable
}

This approach allows for efficient data extraction without regard to row information.

The above is the detailed content of How to Extract Data from HTML Tables in JavaScript?. For more information, please follow other related articles on the PHP Chinese website!