So what does an attribute actually mean? In terms of computing attribute actually means a specification that tends to define a property of an element, an object or a file.
This can be done easily by using the attr function. When we are handling the DOM elements,there are some basic components we can manipulate and these are the properties and the assigned attributes to these elements.
These attributes are available as DOM node properties through javascript. Some of the properties that are used are- The classname, the id,the title,the src,the rel.
Some of the most basic components we can manipulate when it comes to DOM elements are the properties and attributes assigned to those elements.
By using jQuery you can easily manipulate the attribute of an element and helps in giving us access to the element so their properties can be changed.
The method that gets the attribute value is attr method. This gets the value of an attribute from the first element that it finds. You can also set an attributes name and its value onto the element by using the function. Program In this program we are setting the color of each text and changing the values in the text by using the attribute function.
On the click of a button which is an event the colors of the text are changed and their text also. To add styles to specific elements we can use the method addClass method. Multiple classes can be specified and they can be separated by spaces. Program In this following program there are four text boxes and these textboxes get highlighted according to the color assigned to them by the method addClass after clicking the button.
The following table lists some of the selection patterns. JQuery effects can be classified into 4 categories Before getting into effects, create two boxes with the following style to work along with and the corresponding buttons for the effects. The button when clicked will hide the box. The button when clicked will show the box. Fading Effects — Opacity gets adjusted. Sliding Effects — Height gets animated. Duration can also be added if needed as the second argument to the animate method.
In this example, the box will first slides up then after pausing for ms, the box will fade in. JQuery UI is a collection of higher interactive user effects, widgets, themes that is built on the basic jQuery.
To use this, one needs to either download it or can be used as a CDN. Here in this example,. This method will not allow the user to select that paragraph. This method will allow the user to select that paragraph. This example gives the border color red which can be viewed with tab key stroke. Dropppable elements will act as the drop target for the draggable elements. The following options, methods, events can be used along with draggable widget elements.
The following options, methods and events can be used with droppable. The following options, methods, events can be used with this method. The following CSS classes are used for styling the widget:.
The options, methods, events that can be used with this are :. The following options, methods, events can be used with sortable. This will enable the user to drag and sort the elements in the group. Widgets are small plugins that jQuery provides which can be just added with jQuery methods instead of creating from the base. The following options, methods and events can be used along with accordion. The accordion container should have a pairs of headers and contents.
So that the following output can be obtained. This entire pair gets packed inside a parent container to which the jQuery method can be applied upon. The following keyboard interactions are available:. The Css classes that can be used for this method is:.
Tabs should have the following format to work properly. The following options, methods and events can be used with tabs:. The following CSS classes can be used with this method :. Unordered list is the most commonly used element. Content of each menu item should be a block level element. The following CSS styles can be used to change the style for the menu. The following options, methods and events can be used for this method. The CSS classes that can be used to style this method is:.
The title attribute of the input element will be the tooltip. The following keyboard interactions are available :. JQuery Datepickers supports all languages. The localized files can be obtained from. Default is English. The following CSS classes can be used with this method. The following CSS methods can be used to modify the styles:.
The following CSS methods can be used to style the widget:. The following options,methods and events can be used for this method. The following CSS classes can be used to modify the styles.
The following CSS classes can be used to modify the style:. JQuery UI library also has a rich collection of CSS frameworks that can be used easily with all of the above widgets, methods, elements etc.
The downloads will have the corresponding CSS files both the compressed and uncompressed versions. The following list of classes can be used across all of the themes provided by jQuery UI.
Embed Learn more about embeds opens in a new tab Sorry, this content could not be embedded. Try again Convert to link. It is absolutely free, open-source software that uses the permissive MIT License. Q: Is jQuery easy to learn? A: It is not at all tough to learn.
It in fact is even easier than Javascript. However, if you want to master every method of jQuery, it may be a little difficult but you can of course learn it. Q: Where can I learn jQuery? A: You can learn jQuery through Great Learning. The jQuery tutorial you will find at Great Learning is ideal for beginners as it comes with examples.
Q: Is jQuery back end? Even though we've solved the reflow problem, there is a lot of overhead to create a jQuery object. Of course, for a single object the convenience of jQuery far outweighs the minimal performance hit. But if we're dealing with 10, elements the inefficiency is more than noticeable.
Let's see what happens when we skip using jQuery altogether and write this in plain JavaScript. Incredibly, this change reduced our total running time from And this makes sense because it actually takes jQuery some time to create the object. Let's see just how long it takes to create a single jQuery object vs.
This is a significant difference - 0. The point of this comparison isn't to say that jQuery is bad but rather that as a developer you should know when to use it and when not to. We don't actually have to create 10, nodes. Instead we can see what happens when we use one long string of HTML. At However, there is one small improvement we can make.
String concatenation is expensive, especially at this scale. Let's use an array of strings and join them in the end. This runs in I'd say yes, those results seem correct to me. It's trivial though, unless you have like a thousand elements I believe with thousand, or any other big number, elements results should be worse for data-attribute selector, because the DOM would be even bigger for searching right elements — Vytautas Butkus.
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