Solve Problems Encountered during js checkbox operations

Encountered a checkbox operation problem
Select All
Copy codeThe Code is as follows:
$ ("Input [type = 'checkbox']"). each (function (){
This. checked = true
})
Invert Selection
$ ("Input [type = 'checkbox']"). each (function (){
If (this. checked ){
This. checked = false
}
Else {
This. checked = true
}

In theory, you can use $ (obj ). attr ("checked", true) to operate evil, but it is normal in ie, but the reselect effect fails under firfox, $ (obj ). removeattr ("checked") does not work. I don't know what's going on.
You can simply use js to operate dom attributes without any problems.