How to Count Number of Lines in JavaScript Rich Text Editor?

This article provides a method to count the number of lines in a JavaScript RichTextEditor instance using a button click. The following code snippet demonstrates how to implement this functionality.

Implementation

To count the lines in the RichTextEditor, you can use the following HTML and JavaScript code:

HTML

<button id="countLines">Count Lines</button>
<div id="lineCount">Number of lines:</div>
<div id="defaultRTE"></div>

JavaScript

let defaultRTE = new RichTextEditor({});
defaultRTE.appendTo('#defaultRTE');

document.getElementById('countLines').addEventListener('click', function () {
  var content = document.getElementById('defaultRTE_rte-edit-view').innerText;
  var lines = content.split('\n');
  var lineCount = lines.length;
  document.getElementById('lineCount').innerText =
    'Number of lines: ' + lineCount;
});

Explanation

1. HTML Structure: The HTML includes a button to trigger the line count and a div to display the number of lines. The RichTextEditor is initialized in a separate div.

2. JavaScript Logic:

   • A new instance of RichTextEditor is created and appended to the designated div.
   • An event listener is added to the button. When clicked, it retrieves the text content from the RichTextEditor.
   • The content is split into lines using the newline character (\n), and the length of the resulting array gives the line count.
   • Finally, the line count is displayed in the designated div.

This method allows for a straightforward way to count lines in a RichTextEditor, enhancing user interaction and functionality.

Additional References

• RichTextEditor Documentation
• JavaScript Event Listeners
• String.split() Method

Conclusion
I hope you enjoyed learning on how to count the number of lines in JavaScript Rich Text Editor.
You can refer to our JavaScript Rich Text Editor feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our JavaScript Rich Text Editor example to understand how to create and manipulate data.
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