+
+GoalKicker.com – AngularJS Notes for Professionals
+
+22
+
+ Scope of ngRepeat
+
+ngRepeat will always create an isolated child scope so care must be taken if the parent scope needs to be accessed
+
+inside the repeat.
+
+Here is a simple example showing how you can set a value in your parent scope from a click event inside of
+
+ngRepeat.
+
+scope val: {{val}}
+ctrlAs val: {{ctrl.val}}
+
+
+$scope.val = 0;
+this.val = 0;
+
+$scope.itemCollection = [{
+ id: 0,
+ value: 4.99,
+ label: 'Football'
+},
+{
+ id: 1,
+ value: 6.99,
+ label: 'Baseball'
+},
+{
+ id: 2,
+ value: 9.99,
+ label: 'Basketball'
+}];
+
+If there was only val = item.value at ng-click it won't update the val in the parent scope because of the isolated
+
+scope. That's why the parent scope is accessed with $parent reference or with the controllerAs syntax (e.g. ng-
+
+controller="mainController as ctrl").
+
+Nested ng-repeat
+
+You can also use nested ng-repeat.
+
+
+
+ [{{$parent.$index}},{{$index}}] {{i}}
+
+
+
+var app = angular.module("myApp", []);
+app.controller("ctrl", function($scope) {
+ $scope.test = [
+ ['a', 'b', 'c'],
+ ['d', 'e', 'f']
+ ];
+});
+
+GoalKicker.com – AngularJS Notes for Professionals
+
+23
+
+ Here to access the index of parent ng-repeat inside child ng-repeat, you can use $parent.$index.
+
+Section 4.5: Built-In Directives Cheat Sheet
+
+ng-app Sets the AngularJS section.
+
+ng-init Sets a default variable value.
+
+ng-bind Alternative to {{ }} template.
+
+ng-bind-template Binds multiple expressions to the view.
+
+ng-non-bindable States that the data isn't bindable.
+
+ng-bind-html Binds inner HTML property of an HTML element.
+
+ng-change Evaluates specified expression when the user changes the input.
+
+ng-checked Sets the checkbox.
+
+ng-class Sets the css class dynamically.
+
+ng-cloak Prevents displaying the content until AngularJS has taken control.
+
+ng-click Executes a method or expression when element is clicked.
+
+ng-controller Attaches a controller class to the view.
+
+ng-disabled Controls the form element's disabled property
+
+ng-form Sets a form
+
+ng-href Dynamically bind AngularJS variables to the href attribute.
+
+ng-include Used to fetch, compile and include an external HTML fragment to your page.
+
+ng-if Remove or recreates an element in the DOM depending on an expression
+
+ng-switch Conditionally switch control based on matching expression.
+
+ng-model Binds an input,select, textarea etc elements with model property.
+
+ng-readonly Used to set readonly attribute to an element.
+
+ng-repeat Used to loop through each item in a collection to create a new template.
+
+ng-selected Used to set selected option in element.
+
+ng-show/ng-hide Show/Hide elements based on an expression.
+
+ng-src Dynamically bind AngularJS variables to the src attribute.
+
+ng-submit Bind angular expressions to onsubmit events.
+
+ng-value Bind angular expressions to the value of .
+
+ng-required Bind angular expressions to onsubmit events.
+
+GoalKicker.com – AngularJS Notes for Professionals
+
+24
+
+ ng-style Sets CSS style on an HTML element.
+
+ng-pattern Adds the pattern validator to ngModel.
+
+ng-maxlength Adds the maxlength validator to ngModel.
+
+ng-minlength Adds the minlength validator to ngModel.
+
+ng-classeven Works in conjunction with ngRepeat and take effect only on odd (even) rows.
+
+ng-classodd Works in conjunction with ngRepeat and take effect only on odd (even) rows.
+
+ng-cut Used to specify custom behavior on cut event.
+
+ng-copy Used to specify custom behavior on copy event.
+
+ng-paste Used to specify custom behavior on paste event.
+
+ng-options Used to dynamically generate a list of elements for the element.
+
+ng-list Used to convert string into list based on specified delimiter.
+
+ng-open Used to set the open attribute on the element, if the expression inside ngOpen is truthy.
+
+Source (edited a bit)
+
+Section 4.6: ngInclude
+
+ng-include allows you to delegate the control of one part of the page to a specific controller. You may want to do
+this because the complexity of that component is becoming such that you want to encapsulate all the logic in a
+
+dedicated controller.
+
+An example is:
+
+
+
+
+Note that the /gridview will need to be served by the web server as a distinct and legitimate url.
+
+Also, note that the src-attribute accepts an Angular expression. This could be a variable or a function call for
+
+example or, like in this example, a string constant. In this case you need to make sure to wrap the source URL in
+
+single quotes, so it will be evaluated as a string constant. This is a common source of confusion.
+
+Within the /gridview html, you can refer to the gridController as if it were wrapped around the page, eg:
+
+
+
+
+Section 4.7: ng-model-options
+
+ng-model-options allows to change the default behavior of ng-model, this directive allows to register events that
+
+will fire when the ng-model is updated and to attach a debounce effect.
+
+GoalKicker.com – AngularJS Notes for Professionals
+
+25
+
+ This directive accepts an expression that will evaluate to a definition object or a reference to a scope value.
+
+Example:
+
+
+
+The above example will attach a debounce effect of 500 milliseconds on myValue, which will cause the model to
+
+update 500 ms after the user finished typing over the input (that is, when the myValue finished updating).
+
+Available object properties
+
+1.
+
+updateOn: specifies which event should be bound to the input
+
+ng-model-options="{ updateOn: 'blur'}" // will update on blur
+
+2.
+
+debounce: specifies a delay of some millisecond towards the model update
+
+ng-model-options="{'debounce': 500}" // will update the model after 1/2 second
+
+3.
+
+allowInvalid: a boolean flag allowing for an invalid value to the model, circumventing default form
+
+validation, by default these values would be treated as undefined.
+
+4.
+
+getterSetter: a boolean flag indicating if to treat the ng-model as a getter/setter function instead of a plain
+
+model value. The function will then run and return the model value.
+
+Example:
+
+
+
+$scope.myFunc = function() {return "value";}
+
+5.
+
+timezone: defines the timezone for the model if the input is of the date or time. types
+
+Section 4.8: ngCopy
+
+The ngCopy directive specifies behavior to be run on a copy event.
+
+Prevent a user from copying data
+
+
This paragraph cannot be copied
+
+In the controller
+
+$scope.blockCopy = function(event) {
+ event.preventDefault();
+ console.log("Copying won't work");
+}
+
+Section 4.9: ngPaste
+
+The ngPaste directive specifies custom behavior to run when a user pastes content
+
+
+pasted: {{paste}}
+
+GoalKicker.com – AngularJS Notes for Professionals
+
+26
+
+ Section 4.10: ngClick
+
+The ng-click directive attaches a click event to a DOM element.
+
+The ng-click directive allows you to specify custom behavior when an element of DOM is clicked.
+
+It is useful when you want to attach click events on buttons and handle them at your controller.
+
+This directive accepts an expression with the events object available as $event
+
+HTML
+
+
Click me
+
+Controller
+
+.controller("ctrl", function($scope) {
+ $scope.onClick = function(evt) {
+ console.debug("Hello click event: %o ",evt);
+ }
+})
+
+HTML
+
+
+ Increment
+
+
+ count: {{count}}
+
+
+HTML
+
+
+ Increment
+
+
+ count: {{count}}
+
+
+Controller
+
+...
+
+$scope.count = function(){
+ $scope.count = $scope.count + 1;
+}
+...
+
+When the button is clicked, an invocation of the onClick function will print "Hello click event" followed by the event
+
+object.
+
+Section 4.11: ngList
+
+The ng-list directive is used to convert a delimited string from a text input to an array of strings or vice versa.
+
+GoalKicker.com – AngularJS Notes for Professionals
+
+27
+
+ The ng-list directive uses a default delimiter of ", " (comma space).
+
+You can set the delimiter manually by assigning ng-list a delimeter like this ng-list="; ".
+
+In this case the delimiter is set to a semi colon followed by a space.
+
+By default ng-list has an attribute ng-trim which is set to true. ng-trim when false, will respect white space in
+
+your delimiter. By default, ng-list does not take white space into account unless you set ng-trim="false".
+
+Example:
+
+angular.module('test', [])
+ .controller('ngListExample', ['$scope', function($scope) {
+ $scope.list = ['angular', 'is', 'cool!'];
+}]);
+
+A customer delimiter is set to be ;. And the model of the input box is set to the array that was created on the scope.
+
+
+
+
+
+The input box will display with the content: angular; is; cool!
+
+Section 4.12: ngOptions
+
+ngOptions is a directive that simplifies the creation of a html dropdown box for the selection of an item from an
+
+array that will be stored in a model. The ngOptions attribute is used to dynamically generate a list of
+
+elements for the element using the array or object obtained by evaluating the ngOptions comprehension
+
+expression.
+
+With ng-options the markup can be reduced to just a select tag and the directive will create the same select:
+
+
+
+
+There is anther way of creating SELECT options using ng-repeat, but it is not recommended to use ng-repeat as it is
+
+mostly used for general purpose like, the forEach just to loop. Whereas ng-options is specifically for creating
+
+SELECT tag options.
+
+Above example using ng-repeat would be
+
+
+
+ {{curFruit.label}}
+
+
+
+FULL EXAMPLE
+
+Lets see the above example in detail also with some variations in it.
+
+Data model for the example:
+
+$scope.fruit = [
+
+GoalKicker.com – AngularJS Notes for Professionals
+
+28
+
+ { label: "Apples", value: 4, id: 2 },
+ { label: "Oranges", value: 2, id: 1 },
+ { label: "Limes", value: 4, id: 4 },
+ { label: "Lemons", value: 5, id: 3 }
+];
+
+
+ Apples
+
+Effects:
+
+f.label will be the label of the and the value will contain the entire object.
+
+FULL EXAMPLE
+
+
+ Apples
+
+Effects:
+
+f.value (4) will be the value in this case while the label is still the same.
+
+FULL EXAMPLE
+
+
+ Apples
+
+Effects:
+
+Options will be grouped based on there value. Options with same value will fall under one category
+
+FULL EXAMPLE
+
+
+ Apples
+
+GoalKicker.com – AngularJS Notes for Professionals
+
+29
+
+ Effects:
+
+"Apples" and "Limes" will be disabled (unable to select) because of the condition disable when f.value==4. All
+
+options with value=4 shall be disabled
+
+FULL EXAMPLE
+
+
+ Apples
+
+Effects:
+
+There is not visual change when using trackBy, but Angular will detect changes by the id instead of by reference
+
+which is most always a better solution.
+
+FULL EXAMPLE
+
+
+ Apples
+
+Effects:
+
+orderBy is a AngularJS standard filter which arranges options in ascending order(by default) so "Oranges" in this will
+
+appear 1st since its id = 1.
+
+FULL EXAMPLE
+
+All with ng-options must have ng-model attached.
+
+Section 4.13: ngSrc
+
+Using Angular markup like {{hash}} in a src attribute doesn't work right. The browser will fetch from the URL with
+
+the literal text {{hash}} until Angular replaces the expression inside {{hash}}. ng-src directive overrides the
+
+original src attribute for the image tag element and solves the problem
+
+
+
Angular
+
+
{{myName}}
+
+As you type in the input field or change it in any way you will see the value in the paragraph update instantly.
+
+The ng-model variable, in this instance, will be available in your controller as $scope.myName. If you are using the
+
+controllerAs syntax:
+
+
+
+You will need to refer to the controller's scope by pre-pending the controller's alias defined in the ng-controller
+
+attribute to the ng-model variable. This way you won't need to inject $scope into your controller to reference your
+
+ng-model variable, the variable will be available as this.myName inside your controller's function.
+
+Section 4.15: ngClass
+
+Let's assume that you need to show the status of a user and you have several possible CSS classes that could be
+
+used. Angular makes it very easy to choose from a list of several possible classes which allow you to specify an
+
+object list that include conditionals. Angular is able to use the correct class based on the truthiness of the
+
+conditionals.
+
+Your object should contain key/value pairs. The key is a class name that will be applied when the value (conditional)
+
+evaluates to true.
+
+
+
+John Smith
+
+Angular will check the $scope.user object to see the active status and the level number. Depending on the values
+
+in those variables, Angular will apply the matching style to the .
+
+Section 4.16: ngDblclick
+
+The ng-dblclick directive is useful when you want to bind a double-click event into your DOM elements.
+
+This directive accepts an expression
+
+HTML
+
+Double click me
+
+In the above example, the value held at the input will be incremented when the button is double clicked.
+
+Section 4.17: ngHref
+
+ngHref is used instead of href attribute, if we have a angular expressions inside href value. The ngHref directive
+
+overrides the original href attribute of an html tag using href attribute such as tag, tag etc.
+
+The ngHref directive makes sure the link is not broken even if the user clicks the link before AngularJS has evaluated
+
+the code.
+
+Example 1
+
+
+
+Example 2 This example dynamically gets the href value from input box and load it as href value.
+
+link
+
+Example 3
+
+
+
+
+
+ Enter Password
+
+ Your username is free to use!
+
+
+
+
+
+ Your username is taken!
+
+
+ Enter 'StackOverflow' in username field to show ngHide directive.
+
+
+
+GoalKicker.com – AngularJS Notes for Professionals
+
+33
+
+
+
+
+
+
+
+
+
+
+
+
+
+ Section 4.20: ngRequired
+
+The ng-required adds or removes the required validation attribute on an element, which in turn will enable and
+
+disable the require validation key for the input.
+
+It is used to optionally define if an input element is required to have a non-empty value. The directive is helpful
+
+when designing validation on complex HTML forms.
+
+HTML
+
+
+
+At the above example, when the user points his mouse over the div, applyStyle turns to true, which in turn
+
+applies the .active CSS class at the ng-class.
+
+The ng-mouseleave directive runs an expression one a mouse exit event (when the user takes his mouse cursor
+
+away from the DOM element this directive resides in)
+
+HTML
+
+
+
+Reusing the first example, now when the user takes him mouse pointer away from the div, the .active class is
+
+removed.
+
+Section 4.22: ngDisabled
+
+This directive is useful to limit input events based on certain existing conditions.
+
+The ng-disabled directive accepts and expression that should evaluate to either a truthy or a falsy values.
+
+ng-disabled is used to conditionally apply the disabled attribute on an input element.
+
+HTML
+
+
+
+
Submit
+
+vm.name.length===0 is evaluated to true if the input's length is 0, which is turn disables the button, disallowing the
+
+GoalKicker.com – AngularJS Notes for Professionals
+
+34
+
+ user to fire the click event of ng-click
+
+Section 4.23: ngValue
+
+Mostly used under ng-repeat ngValue is useful when dynamically generating lists of radio buttons using ngRepeat
+
+
+
+
+Working plnkr
+
+GoalKicker.com – AngularJS Notes for Professionals
+
+35
+
+ Chapter 5: Use of in-built directives
+
+Section 5.1: Hide/Show HTML Elements
+
+This example hide show html elements.
+
+
+
+
+
+
+
+
+
+
+
+
+Live Demo
+
+Step by step explanation:
+
+1.
+
+ng-app="myDemoApp", the ngApp directive tells angular that a DOM element is controlled by a specific
+
+angular.module named "myDemoApp".
+
+
+
+
+
+
+
+
+
+
+