Introduction to Restore Cursor in JavaScript
Managing the cursor position effectively within a web application can significantly enhance the user experience. The JavaScript API restore-cursor is designed to store and restore the cursor position, ensuring a seamless interaction for users. This feature is particularly useful in text input fields and rich text editors. In this blog post, we will delve into the various functions provided by restore-cursor along with code snippets and a practical application example.
Basic Usage of Restore Cursor
function saveCursorPosition(textarea) {
textarea.dataset.start = textarea.selectionStart;
textarea.dataset.end = textarea.selectionEnd;
}
function restoreCursorPosition(textarea) {
textarea.setSelectionRange(textarea.dataset.start, textarea.dataset.end);
}
const textarea = document.querySelector('textarea');
textarea.addEventListener('focus', () => restoreCursorPosition(textarea)); textarea.addEventListener('blur', () => saveCursorPosition(textarea));
Advanced API for Restore Cursor
class CursorManager {
constructor(element) {
this.element = element;
this.start = 0;
this.end = 0;
this.savePosition();
}
savePosition() {
this.start = this.element.selectionStart;
this.end = this.element.selectionEnd;
}
restorePosition() {
this.element.setSelectionRange(this.start, this.end);
}
}
const inputElement = document.querySelector('input'); const cursorManager = new CursorManager(inputElement);
inputElement.addEventListener('focus', () => cursorManager.restorePosition()); inputElement.addEventListener('blur', () => cursorManager.savePosition());
Practical Application Example
Let’s build a simple note-taking application where we highlight the use of restore-cursor to maintain cursor position:
Note Taker with Restore Cursor
Note Taker
This code ensures that the cursor position is maintained when the user navigates away from the
