How to write the selected event in checkbox
This article mainly introduces how to write the checkbox selection event, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.
When the checkbox selection event is in the front end, you often need to select the multi-check box according to the return of the background data. It can be converted into an array based on the data returned by the background, and then selected by val ([array]). Jquerycheckbox selects, changes state, change, and click events.
There are three ways for jquery to judge the selection of checkbox:
.attr ('checked); / / look at version 1.6 + return: "checked" or "undefined"; 1.5-return: true or false
.prop ('checked'); / / 16+:true/false
.is (': checked'); / / all versions: true/false//, don't forget the colon
Several ways to write the jquery assignment checkbox selected:
All jquery versions can be assigned as follows:
/ $("# cb1") .attr ("checked", "checked")
/ $("# cb1") .attr ("checked", true)
4 assignments of jquery1.6+:prop:
/ / $("# cb1"). Prop ("checked", true); / / it's very simple.
/ / $("# cb1") .prop ({checked:true}); / / map key-value pair
/ / $("# cb1") .prop ("checked", function () {
The returntrue;// function returns true or false
})
/ / remember this: $("# cb1") .prop ("checked", "checked")
Checkboxclick and change events
Method 1:
$("# ischange") .change (function () {
Alert ("checked")
})
Method 2:
$(function () {)
If ($.browser.msie) {
$('input:checkbox') .click (function () {
This.blur ()
This.focus ()
})
}
Method 3:
$("# ischange") .change (function () {
Alert ("checked")
})
})
Method 4:
$(function () {if ($.browser.msie) {$('input:checkbox') .click (function () {this.blur (); this.focus ();});}})
Method 5:
$(document) .ready (function () {
$("testCheckbox") .change (function () {
Alert ("Optionchanged!")
})
})
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