Mandates are JavaScript capacities that control and add practices to HTML DOM components.
The four capacities are: aggregate, controller, pre-connection and post-Link.
The aggregate capacity permits the mandate to control the DOM before it is incorporated and connected in this way permitting it to include/evacuate/change orders, and also, include/uproot/change other DOM components.
The controller capacity encourages order correspondence. Kin and tyke mandates can ask for the controller of their kin and folks to impart data.
The pre-join capacity takes into account private $scope control before the post-join process starts.
The post-join strategy is the essential workhorse technique for the order.
In the mandate, post-gathering DOM control happens, occasion handlers are designed, as are watches and different things. In the statement of the order, the four capacities are characterized like this.
Directives definition of each in ng listed below:-
The four capacities are: aggregate, controller, pre-connection and post-Link.
The aggregate capacity permits the mandate to control the DOM before it is incorporated and connected in this way permitting it to include/evacuate/change orders, and also, include/uproot/change other DOM components.
The controller capacity encourages order correspondence. Kin and tyke mandates can ask for the controller of their kin and folks to impart data.
The pre-join capacity takes into account private $scope control before the post-join process starts.
The post-join strategy is the essential workhorse technique for the order.
In the mandate, post-gathering DOM control happens, occasion handlers are designed, as are watches and different things. In the statement of the order, the four capacities are characterized like this.
Directives definition of each in ng listed below:-
| Name | Description |
|---|---|
| ngJq |
Use this directive to force the angular.element library. This should be used to force either jqLite by leaving ng-jq blank or setting the name of the jquery variable under window (eg. jQuery).
|
| ngApp |
Use this directive to auto-bootstrap an AngularJS application. The
ngApp directive designates the root elementof the application and is typically placed near the root element of the page - e.g. on the <body> or <html> tags. |
| a |
Modifies the default behavior of the html A tag so that the default action is prevented when the href attribute is empty.
|
| ngHref |
Using Angular markup like
{{hash}} in an href attribute will make the link go to the wrong URL if the user clicks it before Angular has a chance to replace the {{hash}} markup with its value. Until Angular replaces the markup the link will be broken and will most likely return a 404 error. The ngHref directive solves this problem. |
| 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}}. The ngSrc directive solves this problem. |
| ngSrcset |
Using Angular markup like
{{hash}} in a srcset attribute doesn't work right: The browser will fetch from the URL with the literal text {{hash}} until Angular replaces the expression inside {{hash}}. The ngSrcset directive solves this problem. |
| ngDisabled |
This directive sets the
disabled attribute on the element if the expression inside ngDisabled evaluates to truthy. |
| ngChecked |
Sets the
checked attribute on the element, if the expression inside ngChecked is truthy. |
| ngReadonly |
Sets the
readOnly attribute on the element, if the expression inside ngReadonly is truthy. |
| ngSelected |
Sets the
selected attribute on the element, if the expression inside ngSelected is truthy. |
| ngOpen |
Sets the
open attribute on the element, if the expression inside ngOpen is truthy. |
| ngForm |
Nestable alias of
form directive. HTML does not allow nesting of form elements. It is useful to nest forms, for example if the validity of a sub-group of controls needs to be determined. |
| form |
Directive that instantiates FormController.
|
| textarea |
HTML textarea element control with angular data-binding. The data-binding and validation properties of this element are exactly the same as those of the input element.
|
| input |
HTML input element control. When used together with
ngModel, it provides data-binding, input state control, and validation. Input control follows HTML5 input types and polyfills the HTML5 validation behavior for older browsers. |
| ngValue |
Binds the given expression to the value of
<option> or input[radio], so that when the element is selected, thengModel of that element is set to the bound value. |
| ngBind |
The
ngBind attribute tells Angular to replace the text content of the specified HTML element with the value of a given expression, and to update the text content when the value of that expression changes. |
| ngBindTemplate |
The
ngBindTemplate directive specifies that the element text content should be replaced with the interpolation of the template in the ngBindTemplate attribute. Unlike ngBind, the ngBindTemplate can contain multiple {{ }}expressions. This directive is needed since some HTML elements (such as TITLE and OPTION) cannot contain SPAN elements. |
| ngBindHtml |
Evaluates the expression and inserts the resulting HTML into the element in a secure way. By default, the resulting HTML content will be sanitized using the $sanitize service. To utilize this functionality, ensure that
$sanitize is available, for example, by including ngSanitize in your module's dependencies (not in core Angular). In order to use ngSanitize in your module's dependencies, you need to include "angular-sanitize.js" in your application. |
| ngChange |
Evaluate the given expression when the user changes the input. The expression is evaluated immediately, unlike the JavaScript onchange event which only triggers at the end of a change (usually, when the user leaves the form element or presses the return key).
|
| ngClass |
The
ngClass directive allows you to dynamically set CSS classes on an HTML element by databinding an expression that represents all classes to be added. |
| ngClassOdd |
The
ngClassOdd and ngClassEven directives work exactly as ngClass, except they work in conjunction withngRepeat and take effect only on odd (even) rows. |
| ngClassEven |
The
ngClassOdd and ngClassEven directives work exactly as ngClass, except they work in conjunction withngRepeat and take effect only on odd (even) rows. |
| ngCloak |
The
ngCloak directive is used to prevent the Angular html template from being briefly displayed by the browser in its raw (uncompiled) form while your application is loading. Use this directive to avoid the undesirable flicker effect caused by the html template display. |
| ngController |
The
ngController directive attaches a controller class to the view. This is a key aspect of how angular supports the principles behind the Model-View-Controller design pattern. |
| ngCsp |
Angular has some features that can break certain CSP (Content Security Policy) rules.
|
| ngClick |
The ngClick directive allows you to specify custom behavior when an element is clicked.
|
| ngDblclick |
The
ngDblclick directive allows you to specify custom behavior on a dblclick event. |
| ngMousedown |
The ngMousedown directive allows you to specify custom behavior on mousedown event.
|
| ngMouseup |
Specify custom behavior on mouseup event.
|
| ngMouseover |
Specify custom behavior on mouseover event.
|
| ngMouseenter |
Specify custom behavior on mouseenter event.
|
| ngMouseleave |
Specify custom behavior on mouseleave event.
|
| ngMousemove |
Specify custom behavior on mousemove event.
|
| ngKeydown |
Specify custom behavior on keydown event.
|
| ngKeyup |
Specify custom behavior on keyup event.
|
| ngKeypress |
Specify custom behavior on keypress event.
|
| ngSubmit |
Enables binding angular expressions to onsubmit events.
|
| ngFocus |
Specify custom behavior on focus event.
|
| ngBlur |
Specify custom behavior on blur event.
|
| ngCopy |
Specify custom behavior on copy event.
|
| ngCut |
Specify custom behavior on cut event.
|
| ngPaste |
Specify custom behavior on paste event.
|
| ngIf |
The
ngIf directive removes or recreates a portion of the DOM tree based on an {expression}. If the expression assigned to ngIf evaluates to a false value then the element is removed from the DOM, otherwise a clone of the element is reinserted into the DOM. |
| ngInclude |
Fetches, compiles and includes an external HTML fragment.
|
| ngInit |
The
ngInit directive allows you to evaluate an expression in the current scope. |
| ngList |
Text input that converts between a delimited string and an array of strings. The default delimiter is a comma followed by a space - equivalent to
ng-list=", ". You can specify a custom delimiter as the value of the ngListattribute - for example, ng-list=" | ". |
| ngModel |
The
ngModel directive binds an input,select, textarea (or custom form control) to a property on the scope using NgModelController, which is created and exposed by this directive. |
| ngModelOptions |
Allows tuning how model updates are done. Using
ngModelOptions you can specify a custom list of events that will trigger a model update and/or a debouncing delay so that the actual update only takes place when a timer expires; this timer will be reset after another change takes place. |
| ngNonBindable |
The
ngNonBindable directive tells Angular not to compile or bind the contents of the current DOM element. This is useful if the element contains what appears to be Angular directives and bindings but which should be ignored by Angular. This could be the case if you have a site that displays snippets of code, for instance. |
| ngOptions |
The
ngOptions attribute can be used to dynamically generate a list of <option> elements for the <select>element using the array or object obtained by evaluating the ngOptions comprehension expression. |
| ngPluralize | ngPluralize is a directive that displays messages according to en-US localization rules. These rules are bundled with angular.js, but can be overridden (see Angular i18n dev guide). You configure ngPluralize directive by specifying the mappings between plural categories and the strings to be displayed. |
| ngRepeat |
The
ngRepeat directive instantiates a template once per item from a collection. Each template instance gets its own scope, where the given loop variable is set to the current collection item, and $index is set to the item index or key. |
| ngShow |
The
ngShow directive shows or hides the given HTML element based on the expression provided to the ngShowattribute. The element is shown or hidden by removing or adding the .ng-hide CSS class onto the element. The.ng-hide CSS class is predefined in AngularJS and sets the display style to none (using an !important flag). For CSP mode please add angular-csp.css to your html file (see ngCsp). |
| ngHide |
The
ngHide directive shows or hides the given HTML element based on the expression provided to the ngHideattribute. The element is shown or hidden by removing or adding the ng-hide CSS class onto the element. The.ng-hide CSS class is predefined in AngularJS and sets the display style to none (using an !important flag). For CSP mode please add angular-csp.css to your html file (see ngCsp). |
| ngStyle |
The
ngStyle directive allows you to set CSS style on an HTML element conditionally. |
| ngSwitch |
The
ngSwitch directive is used to conditionally swap DOM structure on your template based on a scope expression. Elements within ngSwitch but without ngSwitchWhen or ngSwitchDefault directives will be preserved at the location as specified in the template. |
| ngTransclude |
Directive that marks the insertion point for the transcluded DOM of the nearest parent directive that uses transclusion.
|
| script |
Load the content of a
<script> element into $templateCache, so that the template can be used by ngInclude,ngView, or directives. The type of the <script> element must be specified as text/ng-template, and a cache name for the template must be assigned through the element's id, which can then be used as a directive'stemplateUrl. |
| select |
HTML
SELECT element with angular data-binding. |
| ngRequired | |
| ngPattern | |
| ngMaxlength | |
| ngMinlength |
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by title What are directives in angularJs with Example? . You can bookmark this page with a URL https://bikeshsrivastava.blogspot.com/2016/01/part-7what-are-directives-in-angularjs.html?hl=en. Thank You!
Author:
Bikesh Srivastava - Wednesday, January 27, 2016
AngularJS is a toolset for building the framework most suited to your application development. It is fully extensible and works well with other libraries. Every feature can be modified or replaced to suit your unique development workflow and feature needs.
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