" } },{"@type": "Question","name": "3. What are the advantages of using jQuery over plain JavaScript? ","text": "3. What are the advantages of using jQuery over plain JavaScript? ","acceptedAnswer":{ "@type": "Answer","text":"Ans. jQuery offers several advantages over plain JavaScript. It provides a simplified syntax for common JavaScript tasks, such as DOM manipulation, event handling, and AJAX requests. It also offers cross-browser compatibility, meaning that you don't have to write different code for different browsers. Additionally, jQuery has a large community and a vast number of plugins and resources available, making it easier to find solutions to common web development challenges." } },{"@type": "Question","name": "4. How can I handle mouse hover events using jQuery? ","text": "4. How can I handle mouse hover events using jQuery? ","acceptedAnswer":{ "@type": "Answer","text":"Ans. To handle mouse hover events using jQuery, you can use the `.hover()` method. This method takes two functions as arguments, one for when the mouse enters the element and one for when it leaves. For example, you can use the following code to change the background color of an element when the mouse hovers over it:```javascript$(element).hover( function() { $(this).css('background-color', 'yellow'); }, function() { $(this).css('background-color', 'white'); });```" } },{"@type": "Question","name": "5. Can I use jQuery with other JavaScript libraries? ","text": "5. Can I use jQuery with other JavaScript libraries? ","acceptedAnswer":{ "@type": "Answer","text":"Ans. Yes, you can use jQuery with other JavaScript libraries. jQuery is designed to be compatible with other JavaScript libraries and frameworks, and it provides a `.noConflict()` method to avoid conflicts with other libraries that may use the `$` symbol. By using this method, you can assign jQuery to a different variable and still use it alongside other libraries. For example:```javascriptvar j = $.noConflict();// Now you can use jQuery using the 'j' variable instead of '$'j(element).addClass('active');```" } }]},{"@context":"http://schema.org", "@type":"Quiz","name" : "Quiz about jQuery Tutorial - 50 - Hover over description Video Lecture | Importance of jQuery in Website Development - IT & Software","about": {"@type": "Thing","name": "jQuery Tutorial - 50 - Hover over description Video Lecture | Importance of jQuery in Website Development - IT & Software"},"educationalAlignment": {"@type": "AlignmentObject","alignmentType": "educationalSubject","targetName": "IT & Software","targetUrl": "https://edurev.in/v/32520/jQuery-Tutorial-50-Hover-over-description"},"assesses": "Attempt this quiz and test your knowledge" }]
pdf
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IT & Software Exam > IT & Software Videos > Importance of jQuery in Website Development > jQuery Tutorial - 50 - Hover over description
jQuery Tutorial - 50 - Hover over description Video Lecture | Importance of jQuery in Website Development - IT & Software
FAQs on jQuery Tutorial - 50 - Hover over description Video Lecture - Importance of jQuery in Website Development - IT & Software
| 1. What is jQuery and why is it important in IT & Software? |  |
Ans. jQuery is a fast, small, and feature-rich JavaScript library. It simplifies HTML document traversal, event handling, and animation for rapid web development. It is important in IT & Software as it allows developers to write less code and achieve more functionality, making it easier to create interactive and user-friendly websites.
| 2. How can I include jQuery in my web project? | |
Ans. To include jQuery in your web project, you can either download the jQuery library from the official website and include it in your HTML file using the script tag, or you can use a Content Delivery Network (CDN) to include it directly from a remote server. For example, you can use the following script tag to include jQuery from a CDN: <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
| 3. What are the advantages of using jQuery over plain JavaScript? | |
Ans. jQuery offers several advantages over plain JavaScript. It provides a simplified syntax for common JavaScript tasks, such as DOM manipulation, event handling, and AJAX requests. It also offers cross-browser compatibility, meaning that you don't have to write different code for different browsers. Additionally, jQuery has a large community and a vast number of plugins and resources available, making it easier to find solutions to common web development challenges.
| 4. How can I handle mouse hover events using jQuery? | |
Ans. To handle mouse hover events using jQuery, you can use the `.hover()` method. This method takes two functions as arguments, one for when the mouse enters the element and one for when it leaves. For example, you can use the following code to change the background color of an element when the mouse hovers over it:
```javascript
$(element).hover(
function() {
$(this).css("background-color", "yellow");
},
function() {
$(this).css("background-color", "white");
}
);
```
| 5. Can I use jQuery with other JavaScript libraries? | |
Ans. Yes, you can use jQuery with other JavaScript libraries. jQuery is designed to be compatible with other JavaScript libraries and frameworks, and it provides a `.noConflict()` method to avoid conflicts with other libraries that may use the `$` symbol. By using this method, you can assign jQuery to a different variable and still use it alongside other libraries. For example:
```javascript
var j = $.noConflict();
// Now you can use jQuery using the 'j' variable instead of '$'
j(element).addClass("active");
```
Text Transcript from Video
now the attribute that we've called this
is hover text so we can go ahead and
write hover text now that what this will
do is it will take the attribute hover
text which is the value here or here and
it will take that from the class hover
now the only problem with this is let's
go ahead and just alert hover text out
so we can test it is this we'll take the
attribute from let's just show you it
will take the attribute from the first
class that's found so if we hover over
Google we would expect Google a powerful
search engine to now be that attribute
that we've set and we've set that
description however when we hover over
PHP academy' you see that we get the the
attribute that's associated with Google
and the reason for this is that we need
to change this or well I'll tell you the
reason first the reason for this is that
it's only searched for this element
within this particular class and not
unique classes as we hover over them so
instead of using hover we use this and
the way this changes things is as we
hover over a particular element as we
mouse over a particular element this
only gains the element that is or only
takes this attribute from the element
that we're currently hovering over or
recurrently mouse moving over so let's
go ahead and just refresh the page and
see what change that made so hover over
Google or mouse over Google and it says
Google a powerful search engine now when
I hover over PHP academy' it says
tutorials so we've gained just by using
the this keyword we've gained the unique
attribute from each one and obviously
this is important because you might want
to have multiple links on your page and
you obviously want to have a unique
description or hover text for each one
so now that we've got the hover text
that's great we can now start to do
things with it but what we need to do is
we need to assign it or assign this text
to a particular div so we need to go
ahead and first of all style our div
that we're going to be using so I'm
going to call this hover div
and we need to apply some properties to
it just to make it look nice and just to
make it look like you know an actual
hover over box so the first thing I want
to do is say display:none and this is
important because we're going to be
including this div on our page somewhere
and we don't want it to be automatically
displayed every time we only want it to
be displayed when we're actually
hovering over a particular element I'm
going to set the position to absolute
which is also extremely important
because we're going to be defining the
top and the left coordinates as we saw
earlier when I was hovering over the
link let's get rid of that when I was
hovering over this Google link we had
the coordinates appeared so we can set
the div to particular coordinate so it's
important that we use position:absolute
I'm going to go ahead and set just some
aesthetic properties such as font size
we'll go ahead and give it a background
color of white give it a text color of
40 40 40 it's a nice gray color and
we'll give it a border as well which I
guess is quite important that's one
pixel solid and let's say 999 and we'll
give it some padding as well so it
doesn't look too near the edges of our
border so now that we've got this hover
div let's just go ahead and preview what
this looks like in our page so I'm going
to say div ID equals that's hover div
and some text in here so hover div we've
now just included on our page when we
refresh you can see that we've got this
some text in here now you can see that's
automatically overlapped my link my link
is underneath here somewhere and that's
simply because we've set the position to
absolute and not relative or block or
anything else like that so now that
we've got this and we're happy with the
look of it we can go ahead and hide it
again and the reason I've just shown you
this is because what we're going to be
doing is changing the text within this
div every time we hover over a
particular element and then that will in
turn we can in turn set the coordinates
of this div so we're going to
this here and this must be kept on every
page that you use particular links
probably not the best way to go about it
but for now just as we're learning
that's good enough so now that we're
back to normal we just have our link and
now we need to start setting what's
going to happen when we actually hover
over it so we've already got the hover
text but we need to go ahead and
actually set the position of this hover
div so let's go ahead and use a selector
hover div and we need to use the CSS
function if you like to change the
properties of this div now as you know
or probably know in CSS we can use top
and we can set the element to a
particular place so I can say top and
left 20 pixels so if we go ahead and
unhide this again and place some text
inside here you can see that's moved it
20 pixels from the top and 20 pixels
from the left so now that we've done
this we know that what we can do is we
can set the top and the left of this div
the top and the left positioning of this
div to the coordinates relative to the
link that we showed earlier so now
hopefully that starts to make sense
let's go ahead and get rid of that and
let's go ahead and get rid of that and
also the top and left properties as well
so we want to use jQuery to set the top
CSS property of this particular div and
we want to do that using the e object
and again remember we used the client X
and the client Y of this so the top
position will be client Y and then we go
ahead and bind on another CSS changer
and this time we want to change the left
to e dot client X so e dot client X and
E DUP client Y are the values that we
returned earlier and display to the user
but now instead of that we're setting
the top property of our hover div to the
coordinate that the
users currently hovering over app and
then we set the left property to the
x-axis so now you'll see that when we
hover over well nothing happens at the
moment but you will see when we hover
over the CSS will change for hover div
according to the position that the
cursor that so now all that's left to do
is go ahead and actually show the the
div and we want to do this before we
actually set the position
is hover text so we can go ahead and
write hover text now that what this will
do is it will take the attribute hover
text which is the value here or here and
it will take that from the class hover
now the only problem with this is let's
go ahead and just alert hover text out
so we can test it is this we'll take the
attribute from let's just show you it
will take the attribute from the first
class that's found so if we hover over
Google we would expect Google a powerful
search engine to now be that attribute
that we've set and we've set that
description however when we hover over
PHP academy' you see that we get the the
attribute that's associated with Google
and the reason for this is that we need
to change this or well I'll tell you the
reason first the reason for this is that
it's only searched for this element
within this particular class and not
unique classes as we hover over them so
instead of using hover we use this and
the way this changes things is as we
hover over a particular element as we
mouse over a particular element this
only gains the element that is or only
takes this attribute from the element
that we're currently hovering over or
recurrently mouse moving over so let's
go ahead and just refresh the page and
see what change that made so hover over
Google or mouse over Google and it says
Google a powerful search engine now when
I hover over PHP academy' it says
tutorials so we've gained just by using
the this keyword we've gained the unique
attribute from each one and obviously
this is important because you might want
to have multiple links on your page and
you obviously want to have a unique
description or hover text for each one
so now that we've got the hover text
that's great we can now start to do
things with it but what we need to do is
we need to assign it or assign this text
to a particular div so we need to go
ahead and first of all style our div
that we're going to be using so I'm
going to call this hover div
and we need to apply some properties to
it just to make it look nice and just to
make it look like you know an actual
hover over box so the first thing I want
to do is say display:none and this is
important because we're going to be
including this div on our page somewhere
and we don't want it to be automatically
displayed every time we only want it to
be displayed when we're actually
hovering over a particular element I'm
going to set the position to absolute
which is also extremely important
because we're going to be defining the
top and the left coordinates as we saw
earlier when I was hovering over the
link let's get rid of that when I was
hovering over this Google link we had
the coordinates appeared so we can set
the div to particular coordinate so it's
important that we use position:absolute
I'm going to go ahead and set just some
aesthetic properties such as font size
we'll go ahead and give it a background
color of white give it a text color of
40 40 40 it's a nice gray color and
we'll give it a border as well which I
guess is quite important that's one
pixel solid and let's say 999 and we'll
give it some padding as well so it
doesn't look too near the edges of our
border so now that we've got this hover
div let's just go ahead and preview what
this looks like in our page so I'm going
to say div ID equals that's hover div
and some text in here so hover div we've
now just included on our page when we
refresh you can see that we've got this
some text in here now you can see that's
automatically overlapped my link my link
is underneath here somewhere and that's
simply because we've set the position to
absolute and not relative or block or
anything else like that so now that
we've got this and we're happy with the
look of it we can go ahead and hide it
again and the reason I've just shown you
this is because what we're going to be
doing is changing the text within this
div every time we hover over a
particular element and then that will in
turn we can in turn set the coordinates
of this div so we're going to
this here and this must be kept on every
page that you use particular links
probably not the best way to go about it
but for now just as we're learning
that's good enough so now that we're
back to normal we just have our link and
now we need to start setting what's
going to happen when we actually hover
over it so we've already got the hover
text but we need to go ahead and
actually set the position of this hover
div so let's go ahead and use a selector
hover div and we need to use the CSS
function if you like to change the
properties of this div now as you know
or probably know in CSS we can use top
and we can set the element to a
particular place so I can say top and
left 20 pixels so if we go ahead and
unhide this again and place some text
inside here you can see that's moved it
20 pixels from the top and 20 pixels
from the left so now that we've done
this we know that what we can do is we
can set the top and the left of this div
the top and the left positioning of this
div to the coordinates relative to the
link that we showed earlier so now
hopefully that starts to make sense
let's go ahead and get rid of that and
let's go ahead and get rid of that and
also the top and left properties as well
so we want to use jQuery to set the top
CSS property of this particular div and
we want to do that using the e object
and again remember we used the client X
and the client Y of this so the top
position will be client Y and then we go
ahead and bind on another CSS changer
and this time we want to change the left
to e dot client X so e dot client X and
E DUP client Y are the values that we
returned earlier and display to the user
but now instead of that we're setting
the top property of our hover div to the
coordinate that the
users currently hovering over app and
then we set the left property to the
x-axis so now you'll see that when we
hover over well nothing happens at the
moment but you will see when we hover
over the CSS will change for hover div
according to the position that the
cursor that so now all that's left to do
is go ahead and actually show the the
div and we want to do this before we
actually set the position
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Nov 22, 2024 Last updated |
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