在按键事件中删除最后添加的特定符号？

Question

Well i have a input field and i want to delete dash (-) if someone write it. This is my code:

$( "#ownerEntrance" ).on( "keydown", function( event ) {
    var value = $( "#ownerEntrance" ).val();
    if (event.type=="keydown" && event.which == '189') { // 189 for - symbol
        $( "#ownerEntrance" ).val(value.substr(0, value.length - 1));
    }
});

But now it delete symbol before dash. Can i fix it? Thank you!

Answer 1

Try replace with this regex /(-)/g on keyup event:

 $('#no-dash').on('keyup', function() { let $this = $(this); $this.val($this.val().replace(/(-)/g, '')); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <input id="no-dash"> 

This will remove all dashes even on paste(by keyboard). You can add change event to remove it in any ways.