With jQuery you select (query) HTML elements and perform "actions" on them.
The jQuery syntax is tailor made for selecting HTML elements and performing some action on the element(s).
Basic syntax is: $(selector).action()
$(this).hide() - hides the current element.
$("p").hide() - hides all <p> elements.
$(".test").hide() - hides all elements with class="test".
$("#test").hide() - hides the element with id="test".
|Are you familiar with CSS selectors?
jQuery uses CSS syntax to select elements. You will learn more about the selector syntax in the next chapter of this tutorial.
You might have noticed that all jQuery methods in our examples, are inside a document ready event:
This is to prevent any jQuery code from running before the document is finished loading (is ready).
Here are some examples of actions that can fail if methods are run before the document is fully loaded:
Tip: The jQuery team has also created an even shorter method for the document ready event:
Use the syntax you prefer. We think that the document ready event is easier to understand when reading the code.