When Should I Use `$(this)` vs. `this` in JavaScript?

Deciphering the Nuances between '$(this)' and 'this' in JavaScript

In the realm of JavaScript programming, the distinction between '$(this)' and 'this' can often leave developers scratching their heads. Let's delve into the nuances of each to unravel their true purpose and usage within the jQuery ecosystem.

Unraveling the Purpose of '$(this)'

As inferred in your observations, '$()' serves as a powerful function that converts JavaScript elements into jQuery objects. This transformation unlocks the extensive arsenal of jQuery methods and functions, which can manipulate the underlying DOM elements with ease. For instance, in your code snippet, to append text to each 'li' element, you rely on $(this), which ensures compatibility with jQuery's 'append()' function.

Understanding the Direct Usage of 'this'

Conversely, 'this' can be employed directly without the $() conversion for operations that don't require jQuery's assistance. In your provided example, resetting the form does not necessitate jQuery's intervention, hence the straightforward use of 'this' to perform the desired DOM manipulation.

A Handy Rule of Thumb

To simplify your understanding, keep in mind that '$()' is indispensable whenever interacting with jQuery-centric functionalities. Otherwise, 'this' suffices for native DOM operations.

Illustrating the Interplay

Consider these concise snippets:

$(this)[0] === this; // True for jQuery objects with a single element

$("#myDiv")[0] === document.getElementById("myDiv"); // True for element accessed via jQuery

In essence, jQuery objects can be reverted to their native counterparts using the [0] index, underscoring the shared underpinnings between '$(this)' and 'this'.

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