In the first two variations, this method is a shortcut for .bind("click", handler), as well as for .on("click", handler) as of jQuery 1.7. In the third variation, when .click() is called without arguments, it is a shortcut for .trigger("click").
The click event is sent to an element when the mouse pointer is over the element, and the mouse button is pressed and released. Any HTML element can receive this event.
For example, consider the HTML: <div id="target"> Click here </div> <div id="other"> Trigger the handler </div>

The event handler can be bound to any <div>:
$("#target").click(function() {
alert("Handler for .click() called.");
});
Now if we click on this element, the alert is displayed:
Handler for .click() called.
We can also trigger the event when a different element is clicked:
$("#other").click(function() {
$("#target").click();
});
After this code executes, clicks on Trigger the handler will also alert the message.
The click event is only triggered after this exact series of events:
This is usually the desired sequence before taking an action. If this is not required, the mousedown or mouseup event may be more suitable.
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