I just start working on Angularjs, and when I came to ng-controller, there is one confusing point as following:
The HTML codes:
<html lang="en" ng-app="App" ng-controller="AppCtrl">
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="css/bootstrap.min.css">
<title></title>
<script type="text/javascript" src="js/angular.min.js"></script>
<script type="text/javascript" src="js/controller.js"></script>
</head>
<body>
<div class="container">
<div class="page-header">
<h2>Chapter1 <small>Hello,World</small></h2>
</div>
</div>
<div class="container">
<div class="jumbotron">
<h1>Hello, {{name}}</h1>
<label for="name">Enter Your Name</label>
<input type="text" ng-model="name" class="form-control input-lg" id="name">
</div>
</div>
</body>
</html>
The angularjs codes:
function AppCtrl($scope){
$scope.name = "World";
});
the result is that the {{name}} model part can not get the correct data. No default data "World" can be shown, and no matter what I type inside the input text box, the output view is always Hello, {{name}}
EDIT: I refer to a book about angularjs. And the demo case shows that the usage I post here. But I found workaround now.
Your Angular is not bootstrapped. Use:
angular.module('App', [])
.controller('AppCtrl', function($scope) {
$scope.name = "World";
});
I suggest you to read through some basic tutorials first.
Check this working demo: JSFiddle
Related
I am trying to create an angular application from scratch. I have been trying to solve this for hours now, but I couldn't make it work.
All the following files are placed inside a parent folder.
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<title>Hello</title>
<script data-require="angular.js#1.6.0" data-semver="1.6.0" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.0/angular.js"></script>
<link rel="stylesheet" href="style.css" />
<script src="script.js"></script>
</head>
<body ng-app="app">
<h1>Student App</h1>
<section ng-controller="HelloController">
<h4>Enter Student Details</h4>
<label for="name">Name :</label>
<input id="name" type="text" ng-model="student.name" />
<p>Hello {{student.name}}!</p>
</section>
<button id="name" type="submit" ng-click="onButtonClick()">Click</button>
</body>
</html>
HelloController.js
angular.module('app', [])
.controller('HelloController', ["$scope", function($scope) {
$scope.onButtonClick = function()
{
console.log("method invoked");
};
}]);
It would be nice if someone could help me solve this problem I am facing.
Your button is out of the <section> controlled by the controller. So clicking on it calls onButtonClick() on the root scope, not on te controller's scope.
I am starting to learn AngularJS and wanted to try building a simple calculator app, however, whenever I name the ng-app in my html-file, AngularJS stops working.
I tried building a controller, but seem to be doing something wrong when calling it or putting it to use.
I tried putting the files in the XAMPP webfolder because I thought it might not load from my hard drive, but to no avail.
(please disregard all the half-finished rest, right now I just want to get the controller working)
Here is the html:
<!DOCTYPE html>
<html>
<head>
<title>Calculator</title>
</head>
<body ng-app="calculatorApp">
<div ng-controller="mainCtrl">
<input type="number" ng-model="first" autofocus>
<input type="number" ng-model="second">
<br>
<button onClick="defineOperator('+')">+</button>
<button onClick="defineOperator('-')">-</button>
<button onClick="test()">TEST</button>
<br>
<div>
{{first}}
</div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"</script>
<script src="http://localhost/calculator/scripts/app.js" type="text/javascript"></script>
</body>
</html>
And the js:
angular.module('calculatorApp', [])
.controller('mainCtrl', function($scope){
$scope.defineOperator = function(choice) {
switch (operator) {
case +:
return first + second;
break;
default:
}
};
$scope.testOperator = function(click) {
alert("You chose " + operator);
};
});
Any help would be greatly appreciated.
angular.module('calculatorApp', [])
.controller('mainCtrl', function($scope){
$scope.first="hello";
});
<!DOCTYPE html>
<html>
<head>
<title>Calculator</title>
</head>
<body ng-app="calculatorApp">
<div ng-controller="mainCtrl">
<div>
{{first}}
</div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
</body>
</html>
Have a look at this. One thing you have not closed the tag in which angular is defined.
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"</script>
You forgot to put > in above line.
Replace it with
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
You forgot to end the script tag with >
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"</script>
if you want to change the app-name in html page you should also change the app name in the js file :
angular.module('calculatorApp', [])
I am playing with ng-input-tag and wanted to add bootstrap class to the input element of html so as to get its particular bootstrap class styles, but its not working as expected.
Below is the code:
angular
.module('myApp', ['ngTagsInput'])
.controller('myCtrl', function() {
});
<link href="https://cdnjs.cloudflare.com/ajax/libs/ng-tags-input/3.1.1/ng-tags-input.bootstrap.min.css" rel="stylesheet"/>
<link href="https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/readable/bootstrap.min.css" rel="stylesheet" />
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.0-rc.2/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/ng-tags-input/3.1.1/ng-tags-input.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/ng-tags-input/3.1.1/ng-tags-input.min.css" rel="stylesheet" />
<div ng-app="myApp" ng-controller="myCtrl">
<div class="form-group">
<label class="control-label" for="disabledInput">Disabled input</label>
<tags-input ng-model="tags" class="form-control"></tags-input>
</div>
</div>
So i hope you ran the code and found that i am unable to get bootstrap form-control class style for directive.
Here is Plunker link : https://plnkr.co/edit/jZlAsJ?p=info
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.css" />
<link href="https://cdnjs.cloudflare.com/ajax/libs/ng-tags-input/3.1.1/ng-tags-input.bootstrap.min.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.0-rc.2/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/ng-tags-input/3.1.1/ng-tags-input.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/ng-tags-input/3.1.1/ng-tags-input.min.css" rel="stylesheet" />
<script>
angular
.module('myApp', ['ngTagsInput'])
.controller('myCtrl', function() {
});
</script>
</head>
<body>
<div ng-app="myApp" ng-controller="myCtrl">
<div class="form-group">
<label class="control-label" for="disabledInput"> input</label>
<tags-input ng-model="tags"></tags-input>
</div>
</div>
</body>
</html>
See this plunker ... I've solved this for you ( you may need to modify the styling a bit).
https://plnkr.co/edit/sKxMOLWoDPtYNqE8hunS?p=preview
You need to add jquery in your code.
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
Bootstrap js will need jquery to run. Please keep in mind that you have added jquery (above script) before bootstrap.js (watch my code carefully, review the sequel).
Today is the first when i started reading about Angular JS and I tried to do a very basic thing after reading from a tutorial.
<!DOCTYPE html>
<html data-ng-app="">
<head>
<title></title>
</head>
<body>
Name:
<br />
<input type="text" data-ng-app="name" /> {{ name }}
<script src="Scripts/angular.min.js" type="text/javascript"></script>
</body>
</html>
I downloaded and added the angular js library from GitHUB 1.4.x(latest). I expect the name to be written on the fly when user types in the textbox but nothing happens. What am i missing for this basic set up ?
P.S. - I am using an HTML page in Visual Studio 2010.
Some minor adjustments to your code, and it works just fine:
<html ng-app="">
<head>
<title></title>
</head>
<body>
Name:
<br />
<input type="text" ng-model="name" /> {{ name }}
<script src="Scripts/angular.min.js" type="text/javascript"></script>
</body>
</html>
A working code pen can be seen here: http://codepen.io/anon/pen/jPWyaR
JSFIDDLE http://jsfiddle.net/seadonk/aze39fjq/
change the html tag to: <html ng-app>
change your input directive to data-ng-model="name"
<html ng-app>
<head>
</head>
<body>
Name:
<br />
<input type="text" data-ng-model="name" /> {{ name }}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script>
</body>
</html>
I note a few things.
a) No reference to script file which should contain an angular module declaration.
b) The input references an angular app named "name" but it is immediately closed
c) No controller declared
d) data-ng-app needs older version of angular. I suggest use 1.3.5
I will do the following corrections to get it working.
http://plnkr.co/edit/rfXgNl6ugqSmlwXOaHIN?p=preview
<!DOCTYPE html>
<html >
<head>
<title>
My First Angular App
</title>
<script src="https://code.angularjs.org/1.3.15/angular.js" type="text/javascript"></script>
<script type="text/javascript">
var app = angular.module('name', []);
app.controller('MainCtrl', function($scope) {
$scope.name = 'World';
});
</script>
</head>
<body ng-app="name">
Name:
<br />
<div ng-controller="MainCtrl">
<input type="text" ng-model="name"/>
{{name}}
</div>
</body>
</html>
What is the Simplest 'Hello World' in AngularJS for a beginner. So far I have this:
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<div data-ng-app="">
{{'Hello World' }}
</div>
<script src="angular.js"></script>
</body>
</html>
Simplest Hello World that shows 2-way databinding
<!doctype html>
<html lang="en" ng-app>
<head>
<title> Hello World </title>
</head>
<body ng-controller="MainCtrl">
<h1>{{helloWorld}}</h1>
<input type="text" ng-model="helloWorld"></input>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.1/angular.min.js"></script>
<script type="text/javascript">
function MainCtrl($scope){
$scope.helloWorld = "Hello World";
}
</script>
</body>
</html>
edit:
A bit of explanation on what is what and why this is (in my view) a minimal Hello World app showcasing the power of AngularJS
The AngularJS library needs to be included
The custom attribute ng-app is added to kick of the angular application. This directive signals AngularJS to auto-bootstrap an application
The ng-controller directive is added and it's associated javascript function shows exposing an object by assigning it to the injected $scope
The double brackets expression {{helloWorld}} shows the convention used by AngularJS to output model values.
The ng-model directive is used to bind the helloWorld object and shows the power of AngularJS two-way datababinding
Simplest AngularJS 'Hello World' - "The Good Way"
<!doctype html>
<html data-ng-app="myApp">
<head>
<!-- .... -->
</head>
<body>
<div data-ng-controller="MyController">
<input type="text" data-ng-model="name" />
<p>Hello {{name}}</p>
</div>
<script src="angular.js"></script>
<script>
var myApp = angular.module("myApp", []);
myApp.controller("MyController", ["$scope", function($scope) {
$scope.name = "World";
}]);
</script>
</body>
</html>
Found on prettycode.org:
<!doctype html>
<html ng-app>
<head>
<title> Hello World </title>
</head>
<body>
Your name: <input type="text" ng-model="name"></input>
<p ng-show="name">Hi, {{ name }}!</p>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.4/angular.js">
</script>
</body>
</html>