jquery implements all selection, inverse selection, and obtains all selected checkboxes_jquery

I gave 7 different checkbox statuses and shared them with you one by one.

1. Select all

$("#btn1").click(function(){ 
$("input[name='checkbox']").attr("checked","true"); 
}) 

2. Cancel all selections (select none)

$("#btn2").click(function(){ 
$("input[name='checkbox']").removeAttr("checked"); 
}) 

3. Select all odd numbers

$("#btn3").click(function(){ 
$("input[name='checkbox']:odd").attr("checked","true"); 
}) 

4. Select all even numbers

$("#btn6").click(function(){ 
$("input[name='checkbox']:even").attr("checked","true"); 
}) 

5. Counter-election

$("#btn4").click(function(){ 
$("input[name='checkbox']").each(function(){ 
if($(this).attr("checked")) 
{ 
$(this).removeAttr("checked"); 
} 
else 
{ 
$(this).attr("checked","true"); 
} 
}) 
}) 

or

$("#invert").click(function(){
  $("#ruleMessage [name='delModuleID']:checkbox").each(function(i,o){
   $(o).attr("checked",!$(o).attr("checked"));
  });
 });

6. Get the value of the selected item

var aa=""; 
$("#btn5").click(function(){ 
$("input[name='checkbox']:checkbox:checked").each(function(){ 
aa+=$(this).val() 
}) 
document.write(aa); 
}) 
}) 

7. Traverse selected items

$("input[type=checkbox][checked]").each(function(){
 //由于复选框一般选中的是多个,所以可以循环输出 
 alert($(this).val()); 
}); 

The following example describes jquery's implementation of selecting all, inverting selection, and obtaining all selected checkboxes. Share it with everyone for your reference. The details are as follows:
The screenshot of the running effect is as follows:

The specific code is as follows:

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
checkbox1 
 
checkbox2 
 
checkbox3 
 
checkbox4 
 
checkbox5 
 
checkbox6 
 
checkbox7 
 
checkbox8 
 
 
 

The above is a simple example demonstration of how to use checkbox in jquery. I hope it will be helpful to everyone's learning.