JQuery implements a method to prevent the return of the backspace key

JQuery implements a method to prevent the return of the backspace key

This article mainly introduces JQuery's method to prevent the return of the Backspace key. The example shows how jQuery makes Backspace unavailable while Backspace is still available in the browser, which is of great practical value, for more information, see

 

 

This example describes how JQuery can prevent the return of the backspace key. Share it with you for your reference. The specific implementation method is as follows:

The Code is as follows:

// Backspace is unavailable in the browser
$ (Document). keydown (function (e ){
Var keyEvent;
If (e. keyCode = 8 ){
Var d = e. srcElement | e.tar get;
If (d. tagName. toUpperCase () = 'input' | d. tagName. toUpperCase () = 'textarea '){
KeyEvent = d. readOnly | d. disabled;
} Else {
KeyEvent = true;
}
} Else {
KeyEvent = false;
}
If (keyEvent ){
E. preventDefault ();
}
});

// Only prevent Backspace from being available in the input and textarea browsers
$ (Document). keydown (function (e ){
Var keyEvent;
If (e. keyCode = 8 ){
Var d = e. srcElement | e.tar get;
If (d. tagName. toUpperCase () = 'input' | d. tagName. toUpperCase () = 'textarea '){
KeyEvent = d. readOnly | d. disabled;
}
} Else {
KeyEvent = false;
}
If (keyEvent ){
E. preventDefault ();
}
});

 

I hope this article will help you with jQuery programming.