javascript - SetInterval loop relatively confusing to me -

html

<div id="backspace" ng-click="deletestring(''); decrementcursor();"> 

js

<script>     $scope.deletestring = function() {         if($scope.cursorposval > 0){             //$scope.name = $scope.name - letter;             $scope.name = [$scope.name.slice(0, $scope.cursorposval - 1) + $scope.name.slice($scope.cursorposval)].join('');             console.log($scope.name);             settimeout(function(){ setcaretposition("inputbox", $scope.cursorposval); }, 30);         } else {             $scope.cursorposval = 1;         }     }; </script> 

i designing on screen touchscreen keyboard. backspace button. going make when click , hold backspace button, starts removing characters automatically. don't know begin creating setinterval, , know setinterval need use here.

if i'm not wrong, want while you're keeping button pressed, function repeats itself.

you're right setinterval(). however, way manage event wrong.

take @ fiddle (it's not code, simple example best way understand):

http://jsfiddle.net/daq9atdd/1/

$(function(){     var interval = null;      $('#mybutton').mousedown(function(){         interval = setinterval(function(){             console.log('hello !');         }, 250);     });      $('#mybutton').mouseup(function(){         clearinterval(interval);     }); }); 

i start interval when button pressed, store it, , clear when button released.