angularjs make a simple countdown
JavascriptHtmlTemplatesCountdownAngularjsJavascript Problem Overview
I would like make a countDown with Angular js. this is my code:
Html File
<div ng-app ng-controller = "countController"> {{countDown}} <div>
js File
function countController($scope){
$scope.countDown = 10;
var timer = setInterval(function(){$scope.countDown--; console.log($scope.countDown)},1000);
}
in console.log it works I have a countdown but in {{countdown}} refresh it doesn't could you help me please? thanks!
Javascript Solutions
Solution 1 - Javascript
Please take a look at this example here. It is a simple example of a count up! Which I think you could easily modify to create a count down.
http://jsfiddle.net/ganarajpr/LQGE2/
##JavaScript code:
function AlbumCtrl($scope,$timeout) {
$scope.counter = 0;
$scope.onTimeout = function(){
$scope.counter++;
mytimeout = $timeout($scope.onTimeout,1000);
}
var mytimeout = $timeout($scope.onTimeout,1000);
$scope.stop = function(){
$timeout.cancel(mytimeout);
}
}
##HTML markup:
<!doctype html>
<html ng-app>
<head>
<script src="http://code.angularjs.org/angular-1.0.0rc11.min.js"></script>
<script src="http://documentcloud.github.com/underscore/underscore-min.js"></script>
</head>
<body>
<div ng-controller="AlbumCtrl">
{{counter}}
<button ng-click="stop()">Stop</button>
</div>
</body>
</html>
Solution 2 - Javascript
As of version 1.3 there's a service in module ng: $interval
function countController($scope, $interval){
$scope.countDown = 10;
$interval(function(){console.log($scope.countDown--)},1000,0);
}
Use with caution:
> Note: Intervals created by this service must be explicitly destroyed > when you are finished with them. In particular they are not > automatically destroyed when a controller's scope or a directive's > element are destroyed. You should take this into consideration and > make sure to always cancel the interval at the appropriate moment. See > the example below for more details on how and when to do this.
Solution 3 - Javascript
You should use $scope.$apply() when you execute an angular expression from outside of the angular framework.
function countController($scope){
$scope.countDown = 10;
var timer = setInterval(function(){
$scope.countDown--;
$scope.$apply();
console.log($scope.countDown);
}, 1000);
}
Solution 4 - Javascript
I updated Mr. ganaraj answer to show stop and resume functionality and added angular js filter to format countdown timer
controller code
'use strict';
var myApp = angular.module('myApp', []);
myApp.controller('AlbumCtrl', function($scope,$timeout) {
$scope.counter = 0;
$scope.stopped = false;
$scope.buttonText='Stop';
$scope.onTimeout = function(){
$scope.counter++;
mytimeout = $timeout($scope.onTimeout,1000);
}
var mytimeout = $timeout($scope.onTimeout,1000);
$scope.takeAction = function(){
if(!$scope.stopped){
$timeout.cancel(mytimeout);
$scope.buttonText='Resume';
}
else
{
mytimeout = $timeout($scope.onTimeout,1000);
$scope.buttonText='Stop';
}
$scope.stopped=!$scope.stopped;
}
});
filter-code adapted from RobG from stackoverflow
myApp.filter('formatTimer', function() {
return function(input)
{
function z(n) {return (n<10? '0' : '') + n;}
var seconds = input % 60;
var minutes = Math.floor(input / 60);
var hours = Math.floor(minutes / 60);
return (z(hours) +':'+z(minutes)+':'+z(seconds));
};
});
Solution 5 - Javascript
It might help to "How to write the code for countdown watch in AngularJS"
Step 1 : HTML Code-sample
<div ng-app ng-controller="ExampleCtrl">
<div ng-show="countDown_text > 0">Your password is expired in 180 Seconds.</div>
<div ng-show="countDown_text > 0">Seconds left {{countDown_text}}</div>
<div ng-show="countDown_text == 0">Your password is expired!.</div>
</div>
Step 2 : The AngulaJs code-sample
function ExampleCtrl($scope, $timeout) {
var countDowner, countDown = 10;
countDowner = function() {
if (countDown < 0) {
$("#warning").fadeOut(2000);
countDown = 0;
return; // quit
} else {
$scope.countDown_text = countDown; // update scope
countDown--; // -1
$timeout(countDowner, 1000); // loop it again
}
};
$scope.countDown_text = countDown;
countDowner()
}
The full example over countdown watch in AngularJs as given below.
<!DOCTYPE html>
<html>
<head>
<title>AngularJS Example - Single Timer Example</title>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.8/angular.min.js"></script>
<script>
function ExampleCtrl($scope, $timeout) {
var countDowner, countDown = 10;
countDowner = function() {
if (countDown < 0) {
$("#warning").fadeOut(2000);
countDown = 0;
return; // quit
} else {
$scope.countDown_text = countDown; // update scope
countDown--; // -1
$timeout(countDowner, 1000); // loop it again
}
};
$scope.countDown_text = countDown;
countDowner()
}
</script>
</head>
<body>
<div ng-app ng-controller="ExampleCtrl">
<div ng-show="countDown_text > 0">Your password is expired in 180 Seconds.</div>
<div ng-show="countDown_text > 0">Seconds left {{countDown_text}}</div>
<div ng-show="countDown_text == 0">Your password is expired!.</div>
</div>
</body>
</html>
Solution 6 - Javascript
The way I did , it works!
- *angular version 1.5.8 and above.
Angular code
var app = angular.module('counter', []);
app.controller('MainCtrl', function($scope, $interval) {
var decrementCountdown = function() {
$scope.countdown -= 1;
if ($scope.countdown < 1) {
$scope.message = "timed out";
}
};
var startCountDown = function() {
$interval(decrementCountdown, 1000, $scope.countdown)
};
$scope.countdown = 100;
startCountDown();
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.6.10/angular.min.js"></script>
<body ng-app="counter" ng-controller="MainCtrl">
{{countdown}} {{message}}
</body>
Solution 7 - Javascript
You probably didn't declare your module correctly, or you put the function before the module is declared (safe rule is to put angular module after the body, once all the page is loaded). Since you're using angularjs, then you should use $interval (angularjs equivalence to setInterval which is a windows service).
Here is a working solution:
angular.module('count', [])
.controller('countController', function($scope, $interval) {
$scope.countDown = 10;
$interval(function() {
console.log($scope.countDown--);
}, 1000, $scope.countDown);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.1/angular.min.js"></script>
<body>
<div ng-app="count" ng-controller="countController"> {{countDown}} </div>
</body>
Note: it stops at 0 in the html view, but at 1 in the console.log, can you figure out why? ;)
Solution 8 - Javascript
function timerCtrl ($scope,$interval) {
$scope.seconds = 0;
var timer = $interval(function(){
$scope.seconds++;
$scope.$apply();
console.log($scope.countDown);
}, 1000);
}
Solution 9 - Javascript
var timer_seconds_counter = 120;
$scope.countDown = function() {
timer_seconds_counter--;
timer_object = $timeout($scope.countDown, 1000);
$scope.timer = parseInt(timer_seconds_counter / 60) ? parseInt(timer_seconds_counter / 60) : '00';
if ((timer_seconds_counter % 60) < 10) {
$scope.timer += ':' + ((timer_seconds_counter % 60) ? '0' + (timer_seconds_counter % 60) : '00');
} else {
$scope.timer += ':' + ((timer_seconds_counter % 60) ? (timer_seconds_counter % 60) : '00');
}
$scope.timer += ' minutes'
if (timer_seconds_counter === 0) {
timer_seconds_counter = 30;
$timeout.cancel(timer_object);
$scope.timer = '2:00 minutes';
}
}
Solution 10 - Javascript
$scope.countDown = 30;
var timer;
$scope.countTimer = function () {
var time = $timeout(function () {
timer = setInterval(function () {
if ($scope.countDown > 0) {
$scope.countDown--;
} else {
clearInterval(timer);
$window.location.href = '/Logoff';
}
$scope.$apply();
}, 1000);
}, 0);
}
$scope.stop= function () {
clearInterval(timer);
}
IN HTML:
<button type="submit" ng-click="countTimer()">Start</button>
<button type="submit" ng-click="stop()">Clear</button>