Just Learn Code

Mastering Multiple Techniques for Displaying and Printing HTML Content in JavaScript

Printing the Content of a Div Element in JavaScript

Printing is an essential feature of any website that offers visitors information in a printed format. Whether it is educational material, a receipt, or a confirmation page, printing enables users to obtain their preferred format of information.

As developers, it is our responsibility to make the printing process as easy and reliable as possible for our users. In this article, we will explore two methods of printing the content of a div element using JavaScript.

Method 1: Using the window.print() Method

The first method we will explore involves using the window.print() method, which allows us to print the content of an HTML element. This method provides us with the ability to open a print dialog box and let users select their preferred printing options.

To use the window.print() method, we must first define the element we want to print. For instance, if we had a div element with an id of “printable,” we would use the following code to print its content:

“`

var printContents = document.getElementById(“printable”).innerHTML;

var originalContents = document.body.innerHTML;

document.body.innerHTML = printContents;

window.print();

document.body.innerHTML = originalContents;

“`

In the above code, we retrieve the content of the div element using the innerHTML attribute and store it in a variable called printContents.

We then store the original content of the web page in another variable called originalContents. After this, we replace the content of the body tag with the content of the div element so that only the element’s content gets printed.

Finally, we call the window.print() method to open the print dialog box and print the content. One of the benefits of using the window.print() method is that it allows users to customize the printing options based on their preferences, including paper size, background colors, and page orientation.

This feature gives users greater control over how they access and view printed information. Method 2: Using the outerHTML Attribute

The second method we will look at involves using the outerHTML attribute, which enables us to retrieve the HTML content of an entire element, including the opening and closing tags.

By replacing the innerHTML of a selected element with its outerHTML, we can print the content of the element. To use the outerHTML attribute, we first obtain the element we want to print, just like in method one.

Next, we replace the innerHTML of the element with its outerHTML. Here’s what the code would look like:

“`

var printContents = document.getElementById(“printable”).outerHTML;

var originalContents = document.body.innerHTML;

document.body.innerHTML = printContents;

window.print();

document.body.innerHTML = originalContents;

“`

In the above code, we retrieve the content of the div element using the outerHTML attribute and store it in a variable called printContents.

We then store the original content of the web page in another variable called originalContents. After this, we replace the content of the body tag with the content of the div element using its outerHTML.

Finally, we call the window.print() method to open the print dialog box and print the content. The benefit of using the outerHTML attribute method is that it includes the complete HTML syntax of the selected element, which is useful when printing dynamic content.

Moreover, because this method prints the complete HTML code, it is easier to format the printed text the way we want.

Conclusion

In conclusion, printing the content of a div element in JavaScript is a critical feature for developers to provide users a way to access and obtain precise information. While there are several ways to print the content, window.print() and outerHTML attribute methods are the most popular options.

Both methods offer advantages and disadvantages based on user preferences, content type, and website architecture. By understanding these methods, developers can make printing content more accessible, enjoyable, and reliable for users.

3) Using the JavaScript Code to Print the Content of a Div Element in JavaScript

Printing the content of a div element directly through the print dialog box is the most straightforward approach. However, what if you want to add more functionality, like changing the font, formatting, or adding custom headers and footers?

In such cases, it is better to use JavaScript code to print the content of the div element. In this section, we will explore how to create a function to print the content of a div element on button click.

First, we need to create a button that will trigger the print function. Here is an example of how a button element could look like:

“`

“`

In the above code, we have a button element with an onclick attribute that calls the printDiv function.

The function takes an argument, ‘printableContent’, which specifies the id of the div element we want to print. Now, let’s create the printDiv function.

Here’s what the code would look like:

“`

function printDiv(contentID) {

var printContents = document.getElementById(contentID).innerHTML;

var originalContents = document.body.innerHTML;

document.body.innerHTML = printContents;

window.print();

document.body.innerHTML = originalContents;

}

“`

The function takes one argument, ‘contentID,’ which specifies the id of the div element we want to print. Inside the function, we first retrieve the content of the div element using the document.getElementById() method and store its innerHTML in a variable called ‘printContents.’

Next, we store the original contents of the body tag in another variable called ‘originalContents.’ After this, we replace the content of the body tag with the content of the div element so that only the element’s content gets printed.

Finally, we call the window.print() method to open the print dialog box and print the content. Once the printing is over, we restore the original content of the body tag.

Overall, this method provides more flexibility and control when printing HTML content. 4) Using the Window.open() Method to Open and Write to a New Window

The window.open() method allows us to open a new browser window and specify its characteristics, such as its size, position, and toolbars.

This method is useful in scenarios where we want to open an independent window with new content. In this section, we will explore how to use the window.open() method to open and write to a new window.

First, let’s look at how to open a new window using the window.open() method. Here is an example of how to use this method:

“`

var newWindow = window.open(”, ‘_blank’, ‘width=600, height=400’);

“`

In the above code, we create a new window object named ‘newWindow’ and assign it the result of the window.open() method.

The first parameter is an empty string that specifies the URL of the new window (since we don’t want to load a URL), the second parameter ‘_blank’ specifies the name of the new window, and the third parameter specifies the dimensions of the new window. Next, we can write to the HTML document stream of the newly opened window using the window.document.write() method.

Here’s how the code would look like:

“`

newWindow.document.write(‘New Window

Welcome to the New Window

‘);

“`

In the above code, we call the document.write() method of the new window object and pass it a string of HTML code that we want to display in the new window. Finally, we can close the newly opened window using the window.close() method.

Here’s how the code would look like:

“`

newWindow.close();

“`

In the above code, we call the close() method of the new window object to close the new window. Overall, the window.open() method allows us to open and write to a new browser window, providing more flexibility in displaying content to users.

Conclusion:

Printing and displaying HTML content in a browser are essential features for web developers. In this article expansion, we explored two additional methods for printing and displaying HTML content: creating a function to print the content of a div element on button click and using the window.open() method to open and write to a new browser window.

These methods provide developers with more control over the printing and display of HTML content, and thus, better user experiences. 5) Using document.write() Method to Output or Set HTML Elements

The document.write() method is another way to output HTML content on a web page.

This method allows developers to write HTML code directly to the browser document, which is useful for displaying dynamic content. In this section, we will explore how to use the document.write() method to output HTML code to a new window.

To use the document.write() method, we first need to create a new window object using the window.open() method. Here’s an example of how to create a new window:

“`

var newWindow = window.open(”, ‘_blank’, ‘width=600, height=400’);

“`

In the above code, we create a new window object named ‘newWindow’ and set its dimensions to 600 pixels by 400 pixels.

Next, we can use the document.write() method to write HTML code to the new window. Here is an example of how to use the document.write() method:

“`

newWindow.document.write(‘New Window

Welcome to the New Window

‘);

“`

In the above code, we call the document.write() method of the new window object and pass it a string of HTML code that we want to display in the new window.

It’s important to note that when using the document.write() method, we should only call it before the page has finished loading. Otherwise, the method may overwrite the entire page content and cause issues.

To ensure that the document.write() method works correctly, we can call it from an event handler or use a timer to delay the execution of the code.

Using the outerHTML Attribute to Output or Set a Particular HTML Element and Its Content

Another way to output or set HTML elements is to use the outerHTML attribute. This attribute allows developers to access the HTML code of a particular element, including its opening and closing tags.

Here’s an example of how to use the outerHTML attribute:

“`

var element = document.getElementById(‘example’);

console.log(element.outerHTML);

“`

In the above code, we retrieve an HTML element with an id of ‘example’ using the document.getElementById() method. We then log the outerHTML attribute to the console, which outputs the opening and closing tags, as well as the content of the element.

The outerHTML attribute is useful when we want to modify a specific HTML element by setting or changing its content. Here’s an example:

“`

var element = document.getElementById(‘example’);

element.outerHTML = ‘

Succesfully changed the content!

‘;

“`

In the above code, we retrieve an HTML element with an id of ‘example’ using the document.getElementById() method.

We then set the outerHTML attribute to a new string of HTML code, which replaces the previous content of the element with the new code. It’s important to note that modifying an element using the outerHTML attribute will replace the entire element, including its opening and closing tags.

Therefore, it’s recommended to use this method with caution and only when necessary.

Conclusion:

In conclusion, the document.write() method and outerHTML attribute are useful tools for outputting and modifying HTML content on a web page. Both methods provide developers with more flexibility and control when working with HTML code, allowing them to create more dynamic and interactive user experiences.

In this article, we have explored multiple methods of printing and displaying HTML content using JavaScript. We have learned about using the window.print() method and the outerHTML attribute to print the content of a div element, creating a function to print on button click, and using the window.open() method to open and write to a new window.

Additionally, we have looked at using the document.write() method and outerHTML attribute to output or set HTML elements. By understanding these various techniques, developers can create user-friendly web pages and offer better accessibility to users.

The ability to output and modify HTML code provides more flexibility, control, and interactivity, leading to a more dynamic experience for users. Overall, the takeaway is that mastering these methods is critical for web developers looking to improve user experience and optimize their code.

Popular Posts