Dom Manipulation Development Tutorials, Guides & Insights

• querySelectorAll('.export-btn'): Selects all elements with the class export-btn, i.e., the export buttons.
• closest('tr'): This retrieves the closest table row (<tr>) that contains the clicked button.
• querySelectorAll('td'): Retrieves all the <td> cells in the row.
• Array.from(): Converts the list of cells into an array, which allows us to manipulate it easily.
• cells.pop(): Removes the last cell (the one containing the export button), as we don’t want it in the CSV.
• textContent: Extracts the text content from each cell.
• encodeURIComponent(): Encodes the CSV string, making it safe for use in a URL.
• anchor.download: Specifies the filename for the CSV file (in this case, row_data.csv).
• anchor.click(): Programmatically triggers a click on the anchor element, which starts the download.

Here’s a complete example of the HTML and JavaScript code together:

document.getElementById('myButton').addEventListener('click', function() {
    alert('Hello from external JavaScript!');
});

JavaScript code consists of statements, which are executed one after another. Each statement should end with a semicolon (;), though it is not strictly required.

This section is essential for anyone looking to build interactive web applications.

MDN’s guide also covers different programming paradigms that can be used in JavaScript:

Modifying Attributes:

Attributes of an element can be changed using the setAttribute method or directly through properties.

No preview available for this content.