Front End Technology Articles - Page 444 of 745

The Lodash library is in JavaScript, which works on the top of ‘_.js’. It can be used while working with arrays, strings, objects, numbers, etc. The assign() method This function is used to copy the original object into a new object. The difference in this and the spread operator is when nested objects are present and if assign() is used to copy the object, then the nested object will not change and the other variables of the object can be changed. There are two parameters to the assign() function. The first parameter is curly braces {} which is used to ... Read More

Backbone is an MV* framework while jQuery is a DOM toolkit.With Backbone, you represent data as Models, which can be created, validated, destroyed, and saved to the server. Whenever a UI action causes an attribute of a model to change, the model triggers a "change" event; all the Views that display the model's state can be notified of the change so that they are able to respond accordingly, re-rendering themselves with the new information.While jQuery is a solid API for querying the DOM with support for event handling, deferred objects, and animations. It is best suited for things like querying ... Read More

The only hard dependency(without which backbone js won't work at all) is Underscore.js. Underscore is a JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects.There are other dependencies required as you proceed to use more advanced features of backbone.js. For example,Libraries for RESTful persistence(Backbone.sync)History support via Backbone.RouterDOM manipulation with Backbone.View or Jquery

The Stack property in JavaScript is used to store and keep track of the errors and saves the information such as the type of the error, where the error is raised and the reason of the error. The path of the origin of the error is also stored in the stacks in JavaScript. Stack is the error class property in JavaScript, which is also used to store the functions that are called, the order of the functions called too. The format of the error shown is as first, in the first line the type of the error will be displayed ... Read More

The parseInt function available in JavaScript has the following signature −parseInt(string, radix);Where the parameters are the following −string − The value to parse. If this argument is not a string, then it is converted to one using the ToString method. Leading whitespace in this argument is ignored.radix − An integer between 2 and 36 that represents the radix (the base in mathematical numeral systems) of the string.If the radix parameter is omitted, JavaScript assumes the following −If the string begins with "0x", the radix is 16 (hexadecimal)If the string begins with "0", the radix is 8 (octal). This feature is ... Read More

Both new Object() notation and Object literal({}) notations do the same thing. They initialize an object. However, the second notation can be a little different if you start adding properties to it.Examplelet a = {    name: 'Ayush' }This initialization is equivalent to −let a = new Object(); a.name = 'Ayush'orlet a = {} a.name = 'Ayush'

The UInt16.CompareTo() method in C# is used to compare the current instance to a specified object or UInt16 and returns an indication of their relative values.SyntaxFollowing is the syntax −public int CompareTo (object val); public int CompareTo (ushort val;Above, the value for the 1st syntax is an object to compare. The value for 2nd syntax is an unsigned integer to compare.The return value is 0 if the current instance is equal to value. It’s less than zero if the current instance is less than val. The return value is more than zero if the current instance is greater than the ... Read More

The HTML DOM Window stop() provides user the functionality to stop loading the resources of a window without clicking the browser stop button.SyntaxFollowing is the syntax −window.stop()ExampleLet us see an example of HTML DOM Window stop() method − HTML DOM Window stop()    * {       padding: 2px;       margin:5px;    }    form {       width:70%;       margin: 0 auto;       text-align: center;    }    input[type="button"] {       border-radius: 10px;                   ... Read More

The HTML DOM Window parent property returns a reference to the parent window of the child window.SyntaxFollowing is the syntax −Returning reference of parent windowwindow.parentExampleLet us see an example of HTML DOM Window parent property − HTML DOM Window parent    * {       padding: 2px;       margin:5px;    }    form {       width:70%;       margin: 0 auto;       text-align: center;    }    input[type="button"] {       border-radius: 10px;                    HTML-DOM-Window-parent   ... Read More

The HTML DOM Window opener property returns a reference to the parent window that launched/created the child window using open().SyntaxFollowing is the syntax −Returning reference of parent windowwindow.openerExampleLet us see an example of HTML DOM Window opener property − HTML DOM Window opener    * {       padding: 2px;       margin:5px;    }    form {       width:70%;       margin: 0 auto;       text-align: center;    }    input[type="button"] {       border-radius: 10px;                 ... Read More