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Introduction to jQuery getJSON()JSON stands for JavaScript Object Notation. JSON is very popular for the way to exchange data and by using this we can display, style, and modify the data. getJSON () method in JQuery is used to load or to get the JSON encoded data. In some of the cases when we request the server it will return the JSON string. The resulting string will be available to the callback function of the getJSON () method. The getJSON () method will be using the GET HTTP request. In simple words, getJSON() method is used for getting the JSON-formatted data.
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Syntax and ParametersSyntax:
$(selector).getJSON(url[, data][, function])Parameters:
It takes three parameters. The details of the parameters are:
URL: It is of string type and it is mandatory to give or send the URL to the getJSON () method. In this, we will specify the url to which it has to send the request for.
Data: It is of string type or the plain object and it is an optional parameter. In this, the request it will be sent to the server.
Function: It is an optional parameter. It is a function that will get executed if the request is successful. It again consists of three additional parameters. They are data, status, and xhr.
Data: It is of the plain object type. The data which is returned from the server will be here.
Status: It is of string type. It contains the text status. It may be success, error, notmodified, timeout, or parsererror.
Xhr: It is of jqXHR type. It contains the XML HTTP Request. It has jqXHR.done() it indicates the success. The jqXHR.fail() it indicates error and it has jqXHR.always().
How to use jQuery getJSON()?
Before we call the getJSON () method the URL which we need to send to the method for that we need to create the json file.
We need to first install npm.
To install npm we need to execute this command in the command prompt : npm install –global json-server
After executing the above command we have to create and name the file and save the file as filename.json. (filename can be anything according to your requirement.)
After saving the file execute the following command in the command prompt:
Json-server –watch filename.json
By following the above procedure I have created a file and named it is as db.json.
The content present in the chúng tôi file is as follows:
Code:
{ "posts": [ { "id": 1, "title": "json-server", "author": "ABC" } ], { "id": 1, "postId": 1 } ], "profile": { "name": "Raju" } }
Now we are using this URL in our program. How we are using this URL in the getJSON () method and how we are getting data will be shown in the below examples.
Examples of jQuery getJSON()Following are the example are given below:
Example #1This is a simple example of the getJSON () method. In this example, we can observe how the getJSON () method will work.
Code:
$(document).ready(function(){ $.each(event, function(i, value){ $(“div”).html(value); }); }); }); }); Example for the getJSON() method
Output:
In the above program we can observe that we have passed the URL to the getJSON () it will be redirected to the file which we have created and gets the data from the file.
Example #2
This is another example of the getJSON () method.
Code:
$(document).ready(function(){ $.each(event, function(i, value){ $(“div”).append(value + ” “); }); }); }); });
Output:
Example #3
Code:
$(document).ready(function() { }); }); }); Example for the getJSON () method
Output:
We can see in the above code we have passed this URL to the getJSON () method. So it will get the data displays the content in the output.
These are some of the example programs which will help you to understand the getJSON() method.
Recommended ArticlesThis is a guide to jQuery getJSON(). Here we also discuss the introduction and how to use jQuery getJSON()? along with different examples and its code implementation. You may also have a look at the following articles to learn more –
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How To Select All Links Inside The Paragraph Using Jquery?
jQuery is a popular JavaScript library that simplifies HTML DOM traversal, event handling, and AJAX interactions for rapid web development. It offers a wide range of built-in functions and methods that help developers to manipulate HTML elements, styles, and behaviors dynamically.
In this article, we will see how to select all links inside a paragraph using jQuery. Selecting links inside a paragraph is a common requirement when we want to modify the links in a particular section of our website, such as changing styles, finding links, etc.
How to select all links inside the paragraph?Selecting links inside the paragraph is a common task and therefore there are multiple ways through which we can select all links inside a paragraph in jQuery. Let’s see some of the different approaches by which we can select links and see how jQuery can do this task effectively and write more efficient and maintainable code.
Approach 1: Using .children() MethodThe .filter() method is a method provided by jQuery that allows the users to return all the direct child elements of the selected element. For selecting our links inside the paragraph that contain anchor tags y specifying the tag names, we can use the children method. Below is the syntax for achieving the same.
Syntax $("p").children("a").each(function() { }); Example$(document).ready(function(){ $(“span”).children(“a”).each(function(){ $(this).css(“color”, “violet”); }); }); }); .find-link-class { color: black; font-weight: bold; } learning material on technical and non-technical subjects.
Approach 2: Using .filter() MethodThe .filter() method is a method provided by jQuery that allows the users to filter the selected elements based on a specific condition. For selecting our links inside the paragraph that contain anchor tags and then retrieving those tags, we have to define the tag name in the filter() method. Below is the syntax for achieving the same.
Syntax $("p").find("*").filter("a").each(function(){ });The syntax given above first selects all the paragraph elements with the help of the ‘$’ function. After this, it calls the find() method on each paragraph element for retrieving all the anchor tags that are descendants of it. Lastly, filter() method is used to iterate over each link using each() method and select only the anchor i.e., tag to add or change the styles, or to do any other action.
Example$(document).ready(function(){ $(“p”).find(“a”).each(function(){ $(this).css(“color”, “green”); }); }); }); .find-link-class { color: black; font-weight: bold; } learning material on technical and non-technical subjects.
Approach 3: Using .has() MethodThe .has() method is a method provided by jQuery that allows the users to select elements that have a certain descendant element. For selecting our links inside the paragraph that contain anchor tags and then retrieving those tags, we can use this method. Below is the syntax for achieving the same.
Syntax $("p:has(a)").find("a").each(function(){ });The syntax given above first selects all the paragraphs that contain anchor tags with the help of :has() selector. After this, it calls the find() method on each paragraph element for retrieving all the anchor tags that are descendants of it. Lastly, each() method is used to iterate over each link to add or change the styles, or to do any other action.
Example$(document).ready(function(){ $(“p:has(a)”).find(“a”).each(function(){ $(this).css(“color”, “red”); }); }); }); .find-link-class { color: black; font-weight: bold; } learning material on technical and non-technical subjects.
ConclusionSelecting links inside a paragraph is a very easy task as it helps in modifying the links of a particular section of our web application. We discussed different ways for selecting all links inside a paragraph using jQuery. As discussed, we learned the three different approaches, namely using the .children() method, .filter() method, and .has() method because all of these ways are efficient and easy to use. Overall, jQuery is a powerful tool that simplifies HTML DOM traversal, event handling, and AJAX interactions for rapid web development.
Examples Of Jquery Ui Switchclass() Method
Introduction to jQuery switchClass()
jQuery switchClass() method used to adds and removes a specific class to matched elements while animating all style changes. The jQuery switchClass() method is a built in method in the jQuery UI library. In simple words the jQuery switchClass() method switch between one CSS class to another CSS class while animating all style changes.
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Syntax and ParametersThe syntax of jQuery with Class() method of jQueryUI version 1.0 is:
switchClass(removeClassName, addClassName [, duration ] [, easing ] [, complete ]);Parameters:
removeClassName: This parameter specified the names of one or more CSS class which are to be removed and it is passed as a string.
addClassName: This parameter specified the names of one or more CSS class which are to be added to each matched element attribute and it is passed as a string.
duration: This parameter specified the time duration in a millisecond and it is passed as a number or string. The default value of it is 400.
easing: This parameter specified the name of the easing function to be called to the animate() method.
complete: This parameter specified the name of a callback function which is to be called when each element effect is completed.
The syntax of jQuery swithClass() method of jQueryUI version 1.9 support children option also and animate descendant elements also, which is below as –
switchClass(removeClassName, addClassName [, options ]);Parameters:
removeClassName: This parameter specified the names of one or more CSS class which are to be removed and it is passed as a string.
addClassName: This parameter specified the names of one or more CSS class which are to be added to each matched element attribute and it is passed as a string.
options: This parameter specified the animation settings. Which includes:
duration: This parameter specified the time duration in a millisecond and it is passed as a number or string. The default value of it is 400.
easing: This parameter specified the name of the easing function to be called to the animate() method. The default value of it is swing.
complete: This parameter specified the name of a callback function which is to be called when each element effect is completed.
children: This parameter specified whether the animation applies to all descendants or not of the match elements and it is passed as a Boolean. The default value of it is FALSE.
queue: This parameter specified whether an animation is put in the effects queue or not and it is passed as a Boolean or string. The default value of it is TRUE.
All the above properties are optional.
Examples of jQuery UI switchClass() MethodNext, we write the html code to understand the jQuery UI switchClass() method more clearly with the following example, where the switchClass() method will use to change the style class of the specified element of the selected element, as below.
Example #1Code:
.s1 { width : 100px; background-color : #ccc; color : blue; } .s2 { width : 200px; background-color : #00f; color : red; } $(document).ready(function() { $( “h1” ).switchClass( “s1”, “s2”, “easeInOutQuad” ); }); });
Output:
Example #2Code:
.s1 { width: 100px; background-color: #ccc; color : blue; } .s2 { width: 200px; background-color: #00f; color : red; } $(document).ready(function() { $( “h1” ).switchClass( “s1”, “s2”, “fast” ); }); $( “h1” ).switchClass( “s2”, “s1”, “fast” ); }); }); An output of the above code is –
Output:
Example #3Next example we rewrite the above code where in the jQuery UI switchClass() method use to change the style class with duration parameter, as in the below code.
Code:
.s1 { background-color: #ccc; color : blue; } .s2 { background-color: #00f; color : red; } $(document).ready(function() { $( “h1” ).switchClass( “s1”, “s2”, 3000, “easeInOutQuad”); }); });
Output:
Recommended ArticlesThis is a guide to jQuery switchClass(). Here we also discuss the syntax and parameters of jQuery switchClass() along with different examples and its code implementation. you may also have a look at the following articles to learn more –
Parameters And Examples Of Jquery Addclass()
Introduction to jQuery addClass()
In the following article, we will learn about jQuery addClass(). It will be a bit tough to learn jQuery without having knowledge of the JavaScript programming language. jQuery has many inbuilt methods. This method is one of them. By using the addClass() method, we can add specified class or classes to the selected element from the set of matched elements. The class attributes which already exists in this method does not remove them. This method can take one or more class names. To add more than one class, the class names are separated by a space character.
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Syntax and Parameters of jQuery addClass()In simple words, we can say that the addClass() method is used to add a class or classes for the element(s). The addClass() method syntax in the jQuery. It is an inbuilt method in jQuery. Syntax for jQuery addClass() method is as follows:
Syntax:
$(selector) .addClass(className [ , duration] [, easing][,options])Parameters:
It contains some parameters; some of the details of the parameters are:
className: The className should be of string type. It can take one or more class names; spaces separate them.
Duration: The duration can be a string or a number. It can be either a time in milliseconds, or it can be preset. The default value of the duration is 400 milliseconds. It can take slow, fast or normal as a string parameter. This helps us to control the slide animation based on our requirements.
Easing: The easing should be of string type. It is used for transition. The default value is swing.
Function: It is an optional parameter that returns the class names. It takes the index position and class name of an element.
Queue: The queue takes the Boolean value. If the Boolean value is true, it indicates whether to place or not to place the animation. If the Boolean value is false, the animation will take place immediately.
Complete: This function is called once the animation is completed on an element.
Children: Children take the Boolean value. It is helpful to determine which descendant to animate.
Examples to Implement jQuery addClass()This is a simple example of the addClass() method. In this example, we can observe the addClass() method effect on the paragraph. We have passed the two class names in this example; they are a highlight, and main we can see in the code they are separated by space in the addClass() method.
Example #1Code:
$(document).ready(function(){ $(“p”).addClass(“highlight main”); }); }); .highlight { font-size: 200%; color: white; display: block; border: 5px solid red; } .main { margin: 100px; background:purple; }
Output:
The paragraph content is in normal font size without background and color, as shown in the below figure.
We can observe in the below image that the font size, background color, border, margin, and the display got applied to the paragraph as we mentioned all of them in the addClass() method in the code.
Example #2This is another example of the addClass() method by using the function.
Code:
$(document).ready(function(){ $(“li”).addClass(function(n){ return “listitem_” + n; }); }); }); p { margin: 8px; font-size: 20px; font-weight: bolder; cursor: pointer; border: 5px solid blue; } .main { background: orange; } .listitem_1, .listitem_3,.listitem_5 { color: Brown; } .listitem_0, .listitem_2 ,.listitem_4{ color: green; } $( this ).addClass( “main” ); });
Output:
Example #3
Code:
$(document).ready(function(){ $(“p”).removeClass(“highlight”).addClass(“main”); }); }); .highlight { font-size: 200%; color: blue; display: block; border: 15px solid Brown; } .main { background-color: violet; }
Output:
These are some of the examples of the addClass() method by using some of the parameters and functions.
Recommended ArticlesThis is a guide to jQuery addClass(). Here we discuss syntax and parameters of jQuery addClass() along with different examples and its code implementation. You may also look at the following articles to learn more –
Syntax And Different Examples Of Jquery Val()
Introduction to jQuery val()
JQuery Val() is a type of method used for the operations related to the values of the elements in an HTML based web page. The two operations where this method can be used are to set the value for a given element or to get the value for a given element. One can also used an already defined and declared function to fetch the element property, for which the val() method can be used to set or get the values. The syntax for this method is ‘$(selector).val()’, where val will have the value as a parameter and sometimes the function details wherever applicable.
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Syntax:
$(selector).val() $(selector).val( value )This method is used to set the value of a selected element.
$(selector).val( function ( index, currvalue ) )This method is used to set the value of a selected element by using a function.
Parameters:
Value: The value parameter is not an optional parameter, which is used to specify the set value of the attribute.
function ( index, currvalue ): Function ( index, currvalue ) parameter is an optional parameter, which is used to specify the name of a function to execute and return the set value of the attribute.
Examples for the jQuery val()Below given are the examples of jQuery val():
Example #1 – Without ParametersNext, we write the html code to understand the jQuery val ( ) method more clearly with the following example where we set the value attribute of the second and third input element with the value content of the first input element –
Code:
$(document).ready(function() { var cont = $(“input”).val(); $(“input”).val( cont ); });
Output:
Example #2 – Single Select BoxesNext example code where this method is used to get the form’s elements values. The jQuery val( ) method doesn’t accept any arguments and returns an array containing the value of each selected options in a list else returns a NULL value if no option is selected, as in the below code –
Code:
b { color: red; } p { background-color: yellow; margin: 10px; } function fruitdisplayVals() { var fruitValues = $( “#fruit” ).val(); } $( “select” ).change( fruitdisplayVals ); fruitdisplayVals();
Output:
Example #3 – jQuery val() Method with Single and Multiple Select BoxesIn the next example code, we rewrite the above code for jQuery val() method with single and multiple select boxes –
Code:
b { color: red; } p { background-color: yellow; margin: 4px; } function fruitdisplayVals() { var fruitValues = $( “#fruit” ).val(); } $( “select” ).change( fruitdisplayVals ); fruitdisplayVals();
Output:
Now we can select any single fruit option and multiple vegetable options, the output is –
Example #4 – jQuery val() Method with ParameterNext example code where the jQuery wrap( ) method accepts a string to set the value of each matched element. As shown in the below example –
Code:
$(document).ready(function(){ $(“input:text”).val(“Set Value”); }); });
Output:
Example #5 – jQuery val() Method with Function as ParameterThis method accepts a function as a parameter and sets the value of each matched element.
Code:
$(document).ready(function(){ $(“input:text”).val( function(n,c){ return c+”Set Value”; }); }); });
Output:
ConclusionThis method is used to get the value of the html element or to set the value of the html element. Syntax for this are –
$(selector).val( )
$(selector).val( value )
$(selector).val( function ( index, currvalue ) )
Value used to specify the set value of the attribute. function ( index, currvalue ) used to specify the name of a function to execute and return the set value of the attribute.
Recommended ArticlesThis has been a guide to jQuery val(). Here we discuss the syntax, parameters, and various examples of jQuery val(). You may also have a look at the following articles to learn more –
How To Use Recaptcha Javascript?
Introduction to reCAPTCHA Javascript
The following article provides an outline for reCAPTCHA Javascript. Google’s reCAPTCHA is one of the excellent bot identification tools from google analyses for the user interaction patterns, which determine whether the user is a bot or a real-time person; this would have a hard time simulating for identifying those patterns, and which has most of the time the reCAPTCHA is successfully blocking spam the designated domains will throw the error if the captcha is failed.
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What is reCAPTCHA Javascript?The reCAPTCHA is one of the types for loading the web pages from the staging server or localhost that will insist only on the designated domains, which satisfies the conditions for throwing the error. The captcha settings web page will temporarily stop the domains from validating the user datas. Else we can press the settings using the icon and update it from the user login. We used reCAPTCHA in version 3 for the javascript version. API will return a data score indicating whether Google accepts the bot, so the user interaction may require satisfying the conditions. The reCAPTCHA version 2 has a separate javascript jQuery library that will accept the user validation if the application is in other languages like HTML etc.
How to Use reCAPTCHA Javascript?Generally, we can set up the reCAPTCHA on the Morweb site website, and it’s a simple thing that can be accessed using the following steps.
Go to the first website we chose, Admin Console.
We got a page like the one below,
And we entered the required details for filling out the registration of the new website and web page of the application. We can enter the website URL on the required textboxes; then, we select the reCAPTCHA type, like v2 and v3, for required verification requests with the challenge’s specific score. With the help of the Domains section, we can add new domains based on the requirement; the Owners section will add the user’s email based on the dependency. Finally, we can accept the reCAPTCHA terms and conditions; if we need alerts for the specific owners, we can mark the checkbox on the required option. As a result, we can get the API keys for.
Then we can go to the More website backend of the application using the Services option; we can enter the reCAPTCHA option.
Please copy the above Site keys and Secret Key from the Google reCAPTCHA and paste them into the Morweb fields.
Once we enter the Site key, it will validate the keys, and it will show on the console screen whether it will validate whether the user datas has been successfully verified or not.
reCAPTCHA Javascript ExampleThe Google reCAPTCHA is one of the most popular solutions to prevent spam and bots from filling out forms on web-based applications. When we enter reCAPTCHA, the system requires users to solve the simple riddles that are more simple for humans. It will handle the difficulty in preventing the bots from completing the validation. If the form should not be submitted until the reCAPTCHA challenge has been completed from the user end, then it will go to the validation either the front end itself or the backend; it depends on the requirement.
Code:
Welcome To My Domain Please check the box { var response = greCAPTCHA.getResponse(); alert(response); });
In the above example, we used the Apache server to host the web pages like PHP, javascript, html codes. I used HTML elements like checkboxes, labels, text boxes, etc. The HTML elements’ default classes include btn-btn-success, g-reCAPTCHA, and form-group for form-related html elements. Each class has tag elements and attributes for performing client operations with sophisticated UIs. Additionally, we used jQuery and reCAPTCHA APIs like js CDN to perform the web operations. The g-reCAPTCHA is one of the default classes for the captcha feature enabled on the web pages; the data-site key attribute will be used for the Site keys, which are already created by the user using Google reCAPTCHA or other captcha websites. I used localhost as the domain name to create the captcha site keys.
Google reCAPTCHA Javascript ConclusionThe reCAPTCHA is one of the important features, and nowadays, it has been more usable to validate the user input datas. And it is excellent to identify the bot with the help of tools like the google analytics interaction pattern to determine whether the user is a person or a machine.
Recommended ArticlesWe hope that this EDUCBA information on “reCAPTCHA Javascript” was beneficial to you. You can view EDUCBA’s recommended articles for more information.
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