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Top 50 Advanced Jquery Interview Questions

Q1. How Can We Disable The Animation?

We can use the property – “fx.Off” to disable the Jquery animation. Set the property cost to actual then it will disable the animation in Jquery.

Q2. How We Can Check Element Exists Or Not In Jquery?

$(report).Geared up(characteristic()

if ($('# mycontrolid’).Length > zero)

//Code Here if element exists.

);

Q3. Will Jquery Support Ajax ? Mention Some Ajax Methods Which Can Be Used In Jquery?

Yes. Jquery supports AJAX.

Below are a number of the strategies of AJAX:

Get()

Post()

GetJSON()

Ajax()

Q4. How To Use Length Function In Jquery To Text Existance Of An Element By Id?

To check if an detail exists we will use length method in jQuery as beneath:

if $(''#mySampleDiv'').Period )//Tests wheter the div with identity mySampleDiv exists or not

$(mySampleDiv).Find(''div'');

Q5. What Is Jquery?

Jquery is javascript library and it is used for HTML DOM get admission to (manipulating and traversing of HTML DOM elements). It offers most effective feature of occasion handling as well.

Q6. Can We Debug Jquery? If Yes, How Can We Do That?

Yes. We can debug Jquery report by the use of “debugger” key-word. We can add the “debugger” key-word to the line of Jquery file where we must debug.

Q7. How We Can Check/uncheck Radio Buttons In Jquery?

Below is the code snippet to test/uncheck radio buttons:

// Check #mycontrolid

$('#mycontrolid').Attr('checked', proper);

// Uncheck #mycontrolid

$('#mycontrolid').Attr('checked', fake);

Q8. What Are The Advantages Of Using Jquery Over Javascript In Asp.Net Web Application?

Below are the advatages of the usage of jQery over JavaScript:

Jquery is well written optimised javascript code so it will likely be faster in execution except we write identical fashionable optimised javascript code.

Jquery is concise java script code ,me minimal ammount of code is to be written for the same functionality than the javascript.

Javascript associated Development is speedy the usage of Jquery because most of the functionality is already written within the library and we simply want to apply that.

Jquery has move browser assist ,so we save time for supporting all of the browsers.

Q9. Can You Give An Example Of Selecting An Element Based On Its Class Name ?

Below is the sample code snippet:

$(‘.MyControl’).Hide()

Q10. What You Mean By Cdn?

CDN is referred to as – “Content Distribution Network”, which is a network of servers which is deployed in huge statistics middle and may be accessed the usage of net.

Q11. What Is The Use Of Clone Method And Give An Example To Create It In Jquery?

“Clone” approach is used to clone the set of controls, which basically me to duplicate the set of factors which are matched on selectors. It copies the descendant factors together with the determine detail.

For example:

$(record).Ready(characteristic()

$('#mycontrolid').Click(function()

$('#mycontrolid').Clone().AppendTo('frame');

go back fake;

);

Q12. How To Select An Element With Id In Jquery?

To pick an detail with Id write as underneath:

var divValue = $(''#sampleDivId'').Val();

Q13. What Is Jquery In The Context Of Web Applications?

JQuery is nothing but a collection of nicely written javascript code.

In other phrases Jquery is prepared made concise and fast JavaScript Library to be used.

Q14. Explain The Advantages Of Using Cdns?

Below are the benefits of the use of CDNs:

Performance could be advanced as there might not be plenty load on server.

Jquery libraries may be loaded quicker.

Caching for the Jquery libraries may be enabled on use of CDNs.

Q15. How To Get The Selected Value Of Dropdown In Jquery?

Below is the pattern code to bind to dropdown (decided on) –

</select>

Get the chosen price –

$("#myControlID choice:decided on").Text();

Q16. Which Methods Are Used To Provide Effects?

Below are some of the techniques used:

Toggle()

FadeIn()

FadeOut()

Hide()

Show()

Q17. Write A Code Snippet To Select <li> Elements Which Are In Index Greater Than five And Less Than 10 In Jquery?

Below is the code snippet for this situation:

$("ul li:gt(five)").Css('color','inexperienced')

$("ul li:lt(10)").Css('shade','blue')

Q18. Explain Finish Method In Jquery?

“end” method is used to prevent the animations of the elements and produce the elements to its very last country.

Q19. How Can We Set The Page Title In Jquery?

Below is the code snippet used to set the page name:

$(function()

$(file).Attr(“name”, “A4 Academics”);

);

Q20. What Is The Use Of Jquery Min Js File In Asp.Internet Web Application?

JQuery min .Js document is actully a minified model of Actual JQuery .Js. The min documents have much less length however equal content so this improves the overall performance.So You have to choose to use min files.

Q21. How We Can Hide And Show The Controls In Jquery?

Access the manage the usage of ‘$’ and use the methods “Hide()” and “Show()” like below.

For instance:

$(‘#MyControl’).Hide()

$(‘#MyControl’).Show()

Q22. Why To Use Jquery Dialog?

Jquery Dialog is used like a pop up and if Jquery utilized in MVC then we can render the cshtml contents in Jquery Dialog and its used like a verify container (as javascript) too.

Q23. Explain Difference Between Jquery And Javascript?

Query is a library and Javascript is a language and Jquery affords full-fledged assist for javascript language.

Q24. What Are The Parameters Which Are Being Used In Ajax Jquery?

Below are the listing of 4 parameters which can be utilized in AJAX calls –

Type

Cache

Data

URL

Q25. How We Can Implement Animation Effects In Jquery?

“Animate” approach is used for animation in Jquery. This approach is used to alternate the detail appearance and feel and give more results to the elements.

For example:

$("#MyControlID").Animate(top:"45px");

Q26. Can You Give An Example For Chaining Along With Code Snippet?

Below is the pattern code snippet:

Old Code:

$(record).Equipped(feature()

$('#MyControlID').AddClass('check');

$('#MyControlID').Css('shade', 'yellow');

$('#MyControlID').FadeIn('rapid');

);

New Code after chaining:

$(report).Ready(characteristic()

$('#MyControlID').AddClass('take a look at')

.Css('colour', 'yellow')

.FadeIn('fast');

);

Q27. How We Can Select The Specified <li> Element From The List Of <li> Elements In <ul>?

If we want to get the 4th <li> from the list of elements in <ul> then we can write code as under –

$("ul li:eq(three)") // Index will begin from 0.

Q28. Can We Write More Than One Document.Equipped Jquery Functions In One Page?

Yes we are able to write multiple jquery $(document).Ready(feature ()

in a single page.This is useful when you have large Jquery code and also you need to break up it in a couple of files.

Q29. What Does $("div.Parent") Will Select?

It me pick out all of the div factors with magnificence – “parent”.

Q30. What Is The Advantage Of Using Minified Version Of Jquery?

Advantage of the usage of minified verison of Jquery will specifically be overall performance. Size of the minified jquery file will be around 76KB where because the normal Jquery record size will be around 180KB.

Q31. What Is The Meaning Of Selectors In Jquery?

In javascript we have numerous techniques to locate the controls like – “getElementByName” and “getElementByID”, that is used to locate the control primarily based on Name of the manage and ID of the manipulate respectively. Similarly in Jquery we have locate the controls the usage of selectors. Below are a number of the selectors -

“*” - To Find all the factors of the page.

“#” – Used to find the manage via ID.

“.” - Used to locate the manipulate with the aid of Class.

Q32. Will Events Are Also Copied On Clone In Jquery?

By Default “clone” method does now not clone the events until it is being told to copy. When “clone” method is being informed to clone the activities also then along side factors, activities are also being copied. “Clone”approach takes a Boolean parameter, pass real in clone method to duplicate the occasions like under -

$('#mycontrolid').Clone(genuine).AppendTo('body');

Q33. How To Show The Alert Message On Button Click In Jquery?

Jquery is one of the most powerful libraries what we've got and it presents event managing. This state of affairs can be dealt with via “OnClick” of the button. Below is the code snippet –

Q34. What Is The Advantages Of Use Of Document.Equipped Functions In Jquery?

Advantage of the usage of $(document).Prepared(characteristic () in jQuery is that the code interior this characteristic will excecute handiest whilst the whole web page has been loaded in order that there could be no errors just like the DOM item on which the Jquery has to execute isn't loaded.

Q35. How We Can Get The Value Of Multiple Css In Single Statement Of Jquery?

Below is the pattern code to provide an explanation for:

var Mypropertiescollection = $("#MyControlID").Css([ "height", "width", "backgroundColor" ]);

In the above code snippet variable – “Mypropertiescollection” will have array like under –

top: "100px",

width: "200px",

backgroundColor: "#FF01EF"

Q36. What Is The Use Of Validation Jquery Plugins?

In MVC we are able to use these Jquery Plugins in the shape of rules like under -

$('#MyControlId').Guidelines("upload",

required: real

);

Q37. How To Select An Element With Class In Jquery?

To pick an element with magnificence write as underneath:

$(".SampleClass").Css("border","2px solid blue");

Q38. Which Providers Will Give Jquery Cdns?

Following are the list of carriers offers CDNs for Jquery library:

Microsoft

Google

Jquery

Q39. Explain Caching In Jquery?

Caching is brief reminiscence to shop the information, which increases the performance of the software. So in Jquery we can use the same idea to shop the statistics rather than repeating as shown underneath:

Old Code:

$('#MyControlID').AddClass('take a look at');

$('#MyControlID').Css('coloration', 'yellow');

New Code for caching:

var $mycontrol = $("#MyControlID").Css("coloration", "crimson");

//Do somre stuffs here

$mycontrol.Textual content("Error happened!");

Q40. Can We Include Different Versions Of Jquery In Web Page?

Yes. We can include extraordinary variations of Jquery in identical page.

Q41. In Asp.Internet, Jquery Will Be Added In Content And Master Pages Both?

No. If the Jquery report added in grasp page then content pages will going to apply that.

Q42. What Is The Difference Between Jquery Find And Children Methods?

The distinction between locate() and youngsters() methods

are that the children most effective travels a single level down the DOM tree

while the find travels at all stage down the DOM tree.

Q43. What Is The Use Of Jquery Connect?

Connect method is used to bind one characteristic to some other and it’s used to execute the function while a function is achieved from any other object.

Q44. How To Use Jquery In Asp.Net Web Application?

To use jQuery in ASP.NET web application follow the under steps:

Go to http://jquery.Com/(The reliable jQuery WebSite)

Download modern day .Js jQuery file from the internet site.

Put it the script(or different folder) in the root of your net utility

Add the underneath tag on the web page wherein you want to use Jquery script type="text/javascript" src="script/jQueryDownLoadedFileName.Js" /script

Q45. Write A Code Snippet To Sort String Array In Jquery?

Below is the code snippet that is used to type the string array –

$(report).Ready(function()

var a4acarray = [ “Apple”,”Orange”,”Banana”];

sortedarray = a4acarray.Type();

$(“#mycontrolID”).Html(sortedarray.Join(“”));