JQuery implements a method to prevent the backspace key from returning_jquery

The example in this article describes how JQuery prevents the backspace key from returning. Share it with everyone for your reference. The specific implementation method is as follows:

Copy code The code is as follows:

//Backspace is not available in the browser
$(document).keydown(function(e){
var keyEvent;
If(e.keyCode==8){
              var d=e.srcElement||e.target;                                  If(d.tagName.toUpperCase()=='INPUT'||d.tagName.toUpperCase()=='TEXTAREA'){
                      keyEvent=d.readOnly||d.disabled;                                                                                                                                                                            keyEvent=true;                                                                                                                                                                                                                                 keyEvent=false;                                                                                                                       If(keyEvent){
               e.preventDefault();                                                                                                                 });

//Only prevent input and textarea. Backspace is still available in the browser
$(document).keydown(function(e){
var keyEvent;
if(e.keyCode==8){
var d=e.srcElement||e.target;
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 be helpful to everyone’s jQuery programming.