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Articles by Mayank Agarwal
Page 22 of 31
Node.js – process.connected Property
The process.connected property returns True if an IPC channel is connected and will return False after the process.disconnect() method is called. This happens only when the node process is spawned with an IPC channel (i.e., Child process and Cluster).Once the process.connected property is false, no messages can be sent over the IPC channel.Syntaxprocess.connectedExample 1Create two files "parent.js" and "child.js" as follows −parent.js// process.connected Property Demo Example // Importing the child_process modules const fork = require('child_process').fork; // Attaching the child process file const child_file = 'util.js'; // Spawning/calling child process const child = fork(child_file);child.jsconsole.log('In Child') // Check ...
Read MoreNode.js – Timers Module – Scheduling Timers
The timers module contains functions that can execute code after a certain period of time. You do not need to import the timer module explicitly, as it is already globally available across the emulated browser JavaScript API.Timers module is mainly categorised into two categoriesScheduling Timers − This timer schedules the task to take place after a certain instant of time.setImmediate()setInterval()setTimeout()Cancelling Timers − This type of timers cancels the scheduled tasks which is set to take place. ClearImmediate()clearInterval()clearTimeout()Scheduling Timers1. setTimeout() MethodThe setTimeout() method schedules the code execution after a designated number of milliseconds. Only after the timeout has occurred, the code ...
Read Moreangularjs – ng-class Directive
The ng-class Directive in angularjs allows the user to dynamically set the CSS classes on an HTML element by databinding an expression which will further represent all those classes to be added. The class is only added if the expression inside the ngClass Directive returns True, else it will not be added. It is supported by all the HTML elements.The directive does not set any duplicate class if it was already set. When the expression changes, the previously added classes will be removed and the new classes will be added only after that.Syntax..Content..Example − ngClass DirectiveCreate a file "ngClass.html" in ...
Read MoreAngularJS – ng-mousedown Directive
The ng-mousedown Directive in AngularJS basically specifies a custom event on mouse-down event. We can perform multiple functions whenever the mouse is pressed and the mouse-down event is called.Syntax..content..Example − ngMousedown DirectiveCreate a file "ngMousedown.html" in your Angular project directory and copy-paste the following code snippet. ngMousedown Directive Welcome to Tutorials Point angularjs | ngMousedown Directive Click mouse and hold !!! OutputTo run the above code, just go to your file and run it as a normal HTML file.Your browser does not support HTML5 video.
Read MoreAngularJS – angular.element() function
The angular.element() method wraps the raw DOM element or the HTML string as a jQuery element. If jQuery is available or imported, angular.element is an alias for the jQuery function, else this method delegates to AngularJS’s built-in subset of jQuery called jQueryLite or jqLite.Syntaxangular.element(element)Example − Wrapping the DOM element using angular.element()Create a file "element.html" in your Angular project directory and copy-paste the following code snippet. angular.element() Welcome to Tutorials Point ...
Read MoreAngularJS – ng-copy Directive
The ng-copy Directive in AngularJS is used for specifying any custom behaviour while copying the texts in input text fields. We can use this directive to call certain methods that will be triggered while the text is copied from the input field. This directive is supported by all types of input elements.Syntax..content..Example − ngCopy DirectiveCreate a file "ngCopy.html" in your Angular project directory and copy-paste the following code snippet. ngCopy Directive .index {color: white; background-color: green;} ...
Read MoreAngularJS – equals() method
The equals() method in AngularJS basically checks if two objects or two values are equal or not. This method supports value types, regular expressions, arrays, and objects. It will return True if the reference objects passed inside the function are equal, else it will return False.Syntaxangular.equals(value1, value2)Example − Check if the reference objects are equal or notCreate a file "equals.html" in your Angular project directory and copy-paste the following code snippet. angular.equals() Welcome to Tutorials Points ...
Read MoreAngularJS – ngMaxlength Directive
The ngMaxlength Directive in AngularJS adds the maxlength validator to the ngModel. This directive is mostly used to control the text-based inputs but can also be applied for controlling the custom text-based controls.This validator sets the maxlength error key if the value ngModel.$viewValue is longer than the integer value obtained by evaluating the Angular JS expression defined in the ngMaxlength attribute value.Syntax..content..Example − ngMaxlength DirectiveCreate a file "ngMaxlength.html" in your Angular project directory and copy-paste the following code snippet. ngMaxlength Directive ...
Read MoreAngularJS – ng-style Directive
The ng-style Directive in AngularJS helps you to set the CSS style of an HTML element conditionally. If the condition evaluates to True, the style will be applied. The expression inside the ng-style directive must be an object. This is supported by all the HTML elements.Syntax..content..Example − ngStyle DirectiveCreate a file "ngStyle.html" in your Angular project directory and copy-paste the following code snippet. ngStyle Directive span { color: black; } ...
Read MoreAngularJS – ngHref Directive
The ngHref Directive in AngularJS solves the problem of replacing the markup when the link is broken which thus leads the system to return a 404 error. Instead of using markup like {{hash}} in an href attribute which will change or replace the markup value, we should use the ngHref directive since that link can be broken and thus leads to return a System Error.Syntax..content..Example − ngHref DirectiveCreate a file "ngHref.html" in your Angular project directory and copy-paste the following code snippet. ngHref Directive ...
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