The window.location object contains the current location or URL information. We can redirect the users to another webpage using the properties of this object. window.location can be written without the prefix window.We use the following properties of the window.location object to redirect the users to another webpage −window.location.href- it returns the URL (href) of the current page.window.location.replace()- it replaces the current document with new document.window.location.assign() loads a new document.The syntaxes below are used to redirect to another web page. We omit the window prefix and use only location in all the program examples. You can try running the programs using ... Read More

Double equals (==) is abstract equality comparison operator, which transforms the operands to the same type before making the comparison.For example,4 == 4     // true '4' == 4   // true 4 == '4'   // true 0 == false // trueTriple equals (===) are strict equality comparison operator, which returns false for different types and different content.For example,4 === 4     // true 4 === '4'   // false var v1 = {'value': 'key'}; var v2 = {'value': 'key'}; v1 === v2   //false

To add a DOCTYPE tag without changing code of your BSP application, you can try using in Web Server, JQuery, or other UI libraries.There are various other libraries that you can search for as a replacement for CSS3 and they have their own advantage. I have used JQuery UI, Wijmo or Modernizer.

The jQuery.extend() method is used to merge contents of two or more objects together. The object is merged into the first object. You can try to run the following code to learn how to use extend() method −ExampleLive Demo $(document).ready(function() {   $("#button1").click(function() {     var obj1 = {       maths: 60,       history: {pages: 150,price: 400,lessons: 30},       science: 120     };     var obj2 = {       history: { price: 150, lessons: 24 },       economics: 250     };     $.extend(true, obj1, obj2);     $("#demo").append(JSON.stringify(obj1));    }); });    Result    

$(window).load()Use $(window).load(), when you want the code inside it to run only once the entire page is ready (not only DOM).  It executes when the page is fully loaded, including frames, objects and imagesNote: The load() method deprecated in jQuery version 1.8. It was completely removed in version 3.0. To see its working, add jQuery version for CDN before 3.0.$(document).ready()Use the  $(document).ready() method when you want the code inside it to run once the page DOM is ready to execute JavaScript code.

To iterate over arrays and objects in jQuery, use the jQuery forEach() loop. You can try to run the following code to learn how to iterate over arrays and objects −ExampleLive Demo $(document).ready(function(){   $("#button1").click(function(){     var arr = [{subject: "Maths", id:3}, {subject: "History", id:7}];     arr.forEach(function(el, index) {       alert(el.id+" "+el.subject);     });   }); });   Result

To trim a string in jQuery, use the trim() method. It removes the spaces from starting and end of the string.The sample string I am using has spaces −var myStr = "  Hello World    ";Use the trim() method, jQuery.trim(myStr);The following is an example to trim a string in jQuery −ExampleLive Demo $(document).ready(function(){   $("#button1").click(function(){     var myStr = "  Hello World    ";     myStr = jQuery.trim(myStr);     alert(myStr);   }); }); Trim

These codes might help you −$('body').click(function(){ alert('test' )}) var foo = $.data( $('body').get(0), 'events' ).click // you can query $.data( object, 'events' ) and get an object back, then see what events are attached to it.  $.each( foo, function(i,o) {     alert(i) // guid of the event     alert(o) // the function definition of the event handler });

To remove a property from a JavaScript object, use the delete keyword. You can try to run the following code to learn how to remove a propertyExampleLive Demo                          var cricketer = {             name:"Amit",             rank:1,             points: 150          };          delete cricketer.rank;          document.getElementById("demo").innerHTML =             cricketer.name + " has " + cricketer.rank + " rank.";          

To check if event exists on element in jQuery, check for the existing events on the element. Here, I have set the div −   This is demo text. Click here! When you click div, then the alert generates which I have set using the div id:$("#demo").click(function() {   alert("Does event exists? - "+hasEvents); });You can try to run the following code to check if event exists −ExampleLive Demo               $(document).ready(function(){       $("#demo").click(function() {         alert("Does event exists? - "+hasEvents);      });      var events = $._data(document.getElementById('demo'), "events");      var hasEvents = (events != null);    });         This is demo text. Click here!