What are the common events in jQuery
The editor will share with you what are the common events in jQuery. I hope you will get something after reading this article. Let's discuss it together.
I. Classification of jQuery events
JQuery event is an encapsulation of JavaScript event. Commonly used events are classified as follows:
1. Basic event
Window event. Mouse event. Keyboard event. Form event.
2. A compound event is a combination of multiple events
Hover the mouse cursor. Continuous mouse clicks.
II. Mouse events
Mouse events are events that occur when a user moves or clicks a mouse over a document. Common mouse events are:
III. Keyboard events
An event occurs every time a user presses or releases a key on the keyboard. Common keyboard events are as follows:
IV. Form events
When the element gains focus, the focus () event is triggered, and when the focus is lost, the blur () event is triggered.
The submit () event is triggered when the form is submitted.
V. Comprehensive examples
Description of requirements:
1. When the user name input box gets focus, the background color of the input box is light blue, and when it loses focus, it reverts to white background color.
2. The font becomes bold when the mouse is moved to the login button and returns to normal when it is removed.
3. The form submission event is triggered when you hit the "enter" key of the keyboard.
Code:
Event demonstration example # login {width: 400px; height: 250px; background-color: # f2f2f2; border:1px solid # DDDDDD; padding: 5px;} # login fieldset {border: none; margin-top: 10px } # login fieldset legend {font-weight: bold;} # login fieldset p {display: block; height: 30px;} # login fieldset p label {display: block; float:left; text-align: right; font-size: 12px; width: 90px Height: 30px; line-height: 30px;} # login fieldset p input {display: block; float:left; border: 1px solid # 999; width: 250px; height: 30px; line-height: 30px;} # login fieldset p input.code {width: 60px } # login fieldset p img {margin-left: 10px;} # login fieldset p a {color: # 057BD2; font-size: 12px; text-decoration: none; margin: 10px;} # login fieldset p input.btn {background: url (". / images/login.gif") no-repeat Width: 98px; height: 32px; margin-left: 60px; color: # ffffff; cursor: pointer;} # login fieldset p input.input_focus {background-color: # BEE7FC } $(function () {/ / focus event of the user name input box $("input [name = 'member']") .focus (function () {$(this) .addClass ("input_focus");}) / / user name loses focus $("input [name = 'member']") .blur (function () {$(this) .removeClass ("input_focus");}) / / Mouseover event $(".btn") .mouseover (function () {$(this) .css ("font-weight", "bold");}); $(".btn") .mouseout (function () {$(this) .css ("font-weight", "normal");}) / / keyboard event. Hit enter to submit the form. The value of keyCode represents different keyboard keys / / js needs to distinguish the compatibility of keyCode (IE) and which (FF). Event.keyCode | | event.which is used to consider compatibility $(document) .keypress (function (e) {if (e.keyCode==13) {/ / $("# login") .submit () / / simulate form submission alert ("trigger form submission event");});}); user login
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