Is it possible to have a string inside an Angular expression? For example:
<p><strong>Phone:</strong> {{ phone }}</p>
Would it be possible to have that <strong> tag inside that expression, so Phone: isn't rendered to the page, unless something is pulled from the {{ phone }} expression?
Hope that makes sense.
Any help is appreciated.
Thanks in advance!
You can use ng-show to show elements only under certain conditions, so in your case you can hide the complete p element if the desired value is not defined using ng-show:
(or you can use ng-if to completely skip that element as Rahil Wazir mentioned in his comment)
var myApp = angular.module('myApp',[]);
myApp.controller('MyCtrl', function($scope){
$scope.phone1 = '1234';
$scope.phone2 = undefined;
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp">
<div ng-controller="MyCtrl">
<p ng-if="phone1"><strong>Phone: {{phone1}}</strong></p>
<p ng-if="phone2"><strong>Phone: {{phone2}}</strong></p>
</div>
</div>
Use ng-show directive.
https://docs.angularjs.org/api/ng/directive/ngShow
Or use ng-hide directive too.
Hope it helps.
Yes you can use Strong tag in AngularJS
<!DOCTYPE html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.26/angular.min.js"></script>
</head>
<body>
<div ng-app="" ng-controller="personController">
Phone: <input type="text" ng-model="phone "><br>
<br>
<p><strong>Phone:</strong> {{ phone }}</p>
</div>
<script>
function personController($scope) {
$scope.phone = "987654321"
}
</script>
</body>
</html>
yes, you can just use {{ 'some random string' + x }}. Here 'x' is a variable defined on the whichever scope this expression is referring to.
string concatenation will happen as you would expect.
Related
The default hide directive with angular-formly is ng-if which can be configured via e.g. the formlyConfigProvider.
Currently all my fields should always be shown and I don't want to have unneccesary ng-if="!field.hide" checks rendered that can inpact the performance.
How can I tell formly not to use this check per field/form or globally?
ng-if add and remove elements from the DOM, when you want to show and hide large number of elements it can be slow, insted you can use ng-show.
ng-show will only change the visibility of the element.
<html lang="en" itemscope="" itemtype="http://schema.org/Article">
<head>
<script>
var oModelesDep = [];
</script>
<!-- Angular Material requires Angular.js Libraries -->
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular-animate.min.js"></script>
<script src="https://s3.amazonaws.com/gowpres/resources/js/utils/jquery-1.10.2.js"></script>
<!-- Angular Material Library -->
<script src="https://www.weldpad.com/starterkit.js?containerId=60515"></script>
<script data-meta="61021" src="https://www.weldpad.com/sogettopanswerers.html?containerId=61021"></script>
</head>
<body ng-controller="AppCtrl" ng-app="MyApp">
<h4 ng-init="showchat = true">Your - Starter Kit</h4>
<button ng-click="showchat = false">hide</button>
<button ng-click="showchat = true">show</button>
{{showchat}}
<sogettopanswerers ng-show="showchat" tag="html">
<div ng-repeat="qdata in listqdata.items track by $index" style="background-color: white;">
<div class="well" style="overflow: auto;">
<h2>
<a href="{{qdata.link}}" class="question-hyperlink">
{{qdata.title}}
</a>
<small>{{qdata.view_count}} Views</small></h2>
<contentashtml ng-init="load()" content="qdata.body">
</contentashtml>
<div style="padding:15px;display: inline-block;vertical-align: top;">
<p>Name: {{qdata.owner.display_name}}</p>
<a href="{{qdata.owner.link}}">
<img ng-src="{{qdata.owner.profile_image}}" alt="Description"/>
</a>
</div>
<div style="display: inline-block;">
<p>Created: <span am-time-ago="qdata.creation_date * 1000"></span></p>
<p>
Last Update:<span am-time-ago="qdata.last_activity_date * 1000"></span>
</p>
<p>
Answered:{{qdata.is_answered}}
</p>
</div>
<p>
Answers:{{qdata.answer_count}}
</p>
</div>
</div>
</sogettopanswerers>
</body>
</html>
Look at the line:
<sogettopanswerers ng-show="showchat" tag="html">
and see how fast the response is.
you set hide-directive="ng-show" in the formly-form
<formly-form hide-directive="ng-show"></formly-form>
"hide-directive
Allows you to control the directive used to hide fields. Common value for this might be ng-show. It will be passed !field.hide. You can also specify this on a global level using formlyConfig.extras.defaultHideDirective = 'ng-show'"
http://docs.angular-formly.com/docs/formly-form
So you can either set it as I instructed or you can choose to edit it in the config on startup for all fields
I'm trying to add two angular apps / modules to one page.
In the fiddles below you can see that always only the first module, referenced in the html code, will work correctly, whereas the second is not recognized by angular.
In this fiddle we can only execute the doSearch2 method, whereas in this fiddle only the doSearch method works correctly.
I'm looking for the way how to correctly place two angular modules into one page.
Only one AngularJS application can be auto-bootstrapped per HTML document. The first ngApp found in the document will be used to define the root element to auto-bootstrap as an application. To run multiple applications in an HTML document you must manually bootstrap them using angular.bootstrap instead. AngularJS applications cannot be nested within each other.
-- http://docs.angularjs.org/api/ng.directive:ngApp
See also
https://groups.google.com/d/msg/angular/lhbrIG5aBX4/4hYnzq2eGZwJ
http://docs.angularjs.org/api/angular.bootstrap
I created an alternative directive that doesn't have ngApp's limitations. It's called ngModule. This is what you code would look like when you use it:
<!DOCTYPE html>
<html>
<head>
<script src="angular.js"></script>
<script src="angular.ng-modules.js"></script>
<script>
var moduleA = angular.module("MyModuleA", []);
moduleA.controller("MyControllerA", function($scope) {
$scope.name = "Bob A";
});
var moduleB = angular.module("MyModuleB", []);
moduleB.controller("MyControllerB", function($scope) {
$scope.name = "Steve B";
});
</script>
</head>
<body>
<div ng-modules="MyModuleA, MyModuleB">
<h1>Module A, B</h1>
<div ng-controller="MyControllerA">
{{name}}
</div>
<div ng-controller="MyControllerB">
{{name}}
</div>
</div>
<div ng-module="MyModuleB">
<h1>Just Module B</h1>
<div ng-controller="MyControllerB">
{{name}}
</div>
</div>
</body>
</html>
You can get the source code at:
http://www.simplygoodcode.com/2014/04/angularjs-getting-around-ngapp-limitations-with-ngmodule/
It's essentially the same code used internally by AngularJS without the limitations.
Why do you want to use multiple [ng-app] ? Since Angular is resumed by using modules, you can use an app that use multiple dependencies.
Javascript:
// setter syntax -> initializing other module for demonstration
angular.module('otherModule', []);
angular.module('app', ['otherModule'])
.controller('AppController', function () {
// ...do something
});
// getter syntax
angular.module('otherModule')
.controller('OtherController', function () {
// ...do something
});
HTML:
<div ng-app="app">
<div ng-controller="AppController">...</div>
<div ng-controller="OtherController">...</div>
</div>
EDIT
Keep in mind that if you want to use controller inside controller you have to use the controllerAs syntax, like so:
<div ng-app="app">
<div ng-controller="AppController as app">
<div ng-controller="OtherController as other">...</div>
</div>
</div>
You can bootstrap multiple angular applications, but:
1) You need to manually bootstrap them
2) You should not use "document" as the root, but the node where the angular interface is contained to:
var todoRootNode = jQuery('[ng-controller=TodoController]');
angular.bootstrap(todoRootNode, ['TodoApp']);
This would be safe.
Manual bootstrapping both the modules will work. Look at this
<!-- IN HTML -->
<div id="dvFirst">
<div ng-controller="FirstController">
<p>1: {{ desc }}</p>
</div>
</div>
<div id="dvSecond">
<div ng-controller="SecondController ">
<p>2: {{ desc }}</p>
</div>
</div>
// IN SCRIPT
var dvFirst = document.getElementById('dvFirst');
var dvSecond = document.getElementById('dvSecond');
angular.element(document).ready(function() {
angular.bootstrap(dvFirst, ['firstApp']);
angular.bootstrap(dvSecond, ['secondApp']);
});
Here is the link to the Plunker
http://plnkr.co/edit/1SdZ4QpPfuHtdBjTKJIu?p=preview
NOTE: In html, there is no ng-app. id has been used instead.
I made a POC for an Angular application using multiple modules and router-outlets to nest sub apps in a single page app.
You can get the source code at: https://github.com/AhmedBahet/ng-sub-apps
Hope this will help
Is it possible to create an array using ng-init dynamically?
The bellow code is not working
ng-init="medi_count = new Array(5)"
Angular expression is not same like JavaScript expression. It has some limits.!
No Object Creation With New Operator: You cannot use new operator in an Angular expression.
Refer Angular Documentation : Angular Expression
Sure you can its just the same way you create Arrays..
<!DOCTYPE html>
<html ng-app>
<head>
<script src="https://code.angularjs.org/1.4.9/angular.js"></script>
</head>
<body>
<div ng-init="names=[{name:'Shijin',city:'NewYork'}, {name:'John',city:'Montana'},{name:'Phillip',city:'California'}]">
<ul>
<font face="Impact" color="purple" size = "5"><li data-ng-repeat="Objects in names">{{Objects.name}} - {{Objects.city}}</li></font>
</ul>
</div>
</body>
</html>
ng-init is for loading data into an array, as other answer shows. If you just want a new empty array, then make it in the controller
$scope.medi_count = [];
You can do it pretty fine by calling a function
<div ng-init="medicount(5)">
where
$scope.medicount = function(someNumber){
//what you want
}
as answered in this question
I'm trying to add two angular apps / modules to one page.
In the fiddles below you can see that always only the first module, referenced in the html code, will work correctly, whereas the second is not recognized by angular.
In this fiddle we can only execute the doSearch2 method, whereas in this fiddle only the doSearch method works correctly.
I'm looking for the way how to correctly place two angular modules into one page.
Only one AngularJS application can be auto-bootstrapped per HTML document. The first ngApp found in the document will be used to define the root element to auto-bootstrap as an application. To run multiple applications in an HTML document you must manually bootstrap them using angular.bootstrap instead. AngularJS applications cannot be nested within each other.
-- http://docs.angularjs.org/api/ng.directive:ngApp
See also
https://groups.google.com/d/msg/angular/lhbrIG5aBX4/4hYnzq2eGZwJ
http://docs.angularjs.org/api/angular.bootstrap
I created an alternative directive that doesn't have ngApp's limitations. It's called ngModule. This is what you code would look like when you use it:
<!DOCTYPE html>
<html>
<head>
<script src="angular.js"></script>
<script src="angular.ng-modules.js"></script>
<script>
var moduleA = angular.module("MyModuleA", []);
moduleA.controller("MyControllerA", function($scope) {
$scope.name = "Bob A";
});
var moduleB = angular.module("MyModuleB", []);
moduleB.controller("MyControllerB", function($scope) {
$scope.name = "Steve B";
});
</script>
</head>
<body>
<div ng-modules="MyModuleA, MyModuleB">
<h1>Module A, B</h1>
<div ng-controller="MyControllerA">
{{name}}
</div>
<div ng-controller="MyControllerB">
{{name}}
</div>
</div>
<div ng-module="MyModuleB">
<h1>Just Module B</h1>
<div ng-controller="MyControllerB">
{{name}}
</div>
</div>
</body>
</html>
You can get the source code at:
http://www.simplygoodcode.com/2014/04/angularjs-getting-around-ngapp-limitations-with-ngmodule/
It's essentially the same code used internally by AngularJS without the limitations.
Why do you want to use multiple [ng-app] ? Since Angular is resumed by using modules, you can use an app that use multiple dependencies.
Javascript:
// setter syntax -> initializing other module for demonstration
angular.module('otherModule', []);
angular.module('app', ['otherModule'])
.controller('AppController', function () {
// ...do something
});
// getter syntax
angular.module('otherModule')
.controller('OtherController', function () {
// ...do something
});
HTML:
<div ng-app="app">
<div ng-controller="AppController">...</div>
<div ng-controller="OtherController">...</div>
</div>
EDIT
Keep in mind that if you want to use controller inside controller you have to use the controllerAs syntax, like so:
<div ng-app="app">
<div ng-controller="AppController as app">
<div ng-controller="OtherController as other">...</div>
</div>
</div>
You can bootstrap multiple angular applications, but:
1) You need to manually bootstrap them
2) You should not use "document" as the root, but the node where the angular interface is contained to:
var todoRootNode = jQuery('[ng-controller=TodoController]');
angular.bootstrap(todoRootNode, ['TodoApp']);
This would be safe.
Manual bootstrapping both the modules will work. Look at this
<!-- IN HTML -->
<div id="dvFirst">
<div ng-controller="FirstController">
<p>1: {{ desc }}</p>
</div>
</div>
<div id="dvSecond">
<div ng-controller="SecondController ">
<p>2: {{ desc }}</p>
</div>
</div>
// IN SCRIPT
var dvFirst = document.getElementById('dvFirst');
var dvSecond = document.getElementById('dvSecond');
angular.element(document).ready(function() {
angular.bootstrap(dvFirst, ['firstApp']);
angular.bootstrap(dvSecond, ['secondApp']);
});
Here is the link to the Plunker
http://plnkr.co/edit/1SdZ4QpPfuHtdBjTKJIu?p=preview
NOTE: In html, there is no ng-app. id has been used instead.
I made a POC for an Angular application using multiple modules and router-outlets to nest sub apps in a single page app.
You can get the source code at: https://github.com/AhmedBahet/ng-sub-apps
Hope this will help
I'm attempting to update my model using ng-click attached to a <p>.
I have no problem with an assignment expression outside of an ng-repeat, or with calling a scope method inside the ng-repeat. However, if I use an assignment inside the ng-repeat, it appears to be ignored. I don't see any messages reported in the Firefox console, but haven't tried setting breakpoints to see if the event is being fired.
<!DOCTYPE html>
<html>
<head>
<title>Test of ng-click</title>
<script type='text/javascript' src='http://code.angularjs.org/1.1.1/angular.js'></script>
<script type='text/javascript'>//<![CDATA[
function MyCtrl($scope) {
$scope.selected = "";
$scope.defaultValue = "test";
$scope.values = ["foo", "bar", "baz"];
$scope.doSelect = function(val) {
$scope.selected = val;
}
}
//]]>
</script>
</head>
<body ng-app>
<div ng-controller='MyCtrl'>
<p>Selected = {{selected}}</p>
<hr/>
<p ng-click='selected = defaultValue'>Click me</p>
<hr/>
<p ng-repeat='value in values' ng-click='selected = value'>{{value}}</p>
<hr/>
<p ng-repeat='value in values' ng-click='doSelect(value)'>{{value}}</p>
</div>
</body>
</html>
Fiddle is here, if you prefer (along with a couple of earlier variants).
Directive ngRepeat creates a new scope for each iteration, so you need to reference your variables in parent scope.
Use $parent.selected = value, as in:
<p ng-repeat='value in values' ng-click='$parent.selected = value'>{{value}}</p>
Note: Function call propagates due to prototypal inheritance.
If you want to learn more: The Nuances of Scope Prototypal Inheritance.
As #Stewie mentioned, $parent is one way to solve this issue. However, the recommended (by the Angular team) solution is to not define primitive properties on the $scope. Rather, the $scope should reference your model. Using references also avoids the issue (because primitive properties will not be created on the child scopes which hide/shadow the parent scope properties of the same name), and you don't have to remember when to use $parent:
HTML:
<p>Selected = {{model.selected}}</p>
<hr/>
<p ng-click='model.selected = defaultValue'>Click me</p>
<hr/>
<p ng-repeat='value in values' ng-click='model.selected = value'>{{value}}</p>
<hr/>
<p ng-repeat='value in values' ng-click='doSelect(value)'>{{value}}</p>
JavaScript:
$scope.model = { selected: ""};
...
$scope.doSelect = function (val) {
$scope.model.selected = val;
}
Fiddle.
I recently updated the wiki page that #Stewie mentioned to always recommend this approach.