Trending February 2024 # How To Use Recaptcha Javascript? # Suggested March 2024 # Top 9 Popular

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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 Example

The 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 Conclusion

The 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.

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How To Implement Stack Method In Javascript?

Definition of JavaScript Stack

JavaScript stack can be implemented easily by using the array data structure available in it. A stack is a basic data structure that allows us to store the data and retrieve it in Last In First Out (LIFO) or First In Last Out (FILO) order. This means the data which is inserted first into the stack can be removed at last or the data which is inserted at the last can be removed first. The data access to the stack is only accessible from one end of it. JavaScript stack will have two main methods, one is to insert the element into the stack and the second is to remove the element from the stack.

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Methods to Implement Javascript Stack 1. Push

This method will insert the element into the stack. The element will be inserted on the top of the stack. As shown in the figure, the stack grows from one side of it. The top represents the value to which is stack is pointing currently. After every push operation, the top will be incremented by one. The top is also known as a stack pointer. When the stack is empty i.e. no elements are present in it the top will point to -1 in our case.

Code:

JavaScript Stack .body-data { border : #81D4FA 2px solid; background-color : #03a9f400; text-align : left; padding-left : 20px; padding-bottom: 20px; height : auto; width : auto; } .resultText { margin: 0 0 3px 0; padding: 0px; display: block;font-weight: bold; } .heading { font-weight: bold; border-bottom: 2px solid #ddd; font-size: 15px; width: 98%; } class Stack { constructor () { this.stack = []; this.top = -1; } push (value) { this.top++; console.log( “Inserting Element: ” + value ); this.stack[ chúng tôi ] = value; } printElements(id) { let elements = “”; for(vari=0;i<=this.top;i++){ elements += this.stack[i] + ” “; } document.getElementById(id).innerHTML += elements; } } let myStack = new Stack(); myStack.push( 5 ); myStack.push( 10 ); myStack.push( 12);myStack.push( 20 ); myStack.push( 35 ); myStack.printElements(“result1”);

Here, We have declared on class for implementing a stack. There are two main variables defined in the class, the stack is an array to store the data, and the top is to maintain the position of the last inserted element into the stack. One method is implemented to push the elements and another is implemented to display the stack elements.

Output: After push operations.

2. isEmpty()

This method will check if the stack is empty and will return true or false. When the stack does not contain any element then the Top will be pointing to -1 i.e., not any element. To check for the stack if it is empty, we can use this pointer. Whenever the Top will be pointing nowhere or to -1 then we can say the stack is empty. We will implement this method in the same way.

Code:

JavaScript Stack .body-data { border : #81D4FA 2px solid; background-color : #03a9f400; text-align : left; padding-left : 20px; padding-bottom: 20px; height : auto; width : auto; } .heading { font-weight: bold; border-bottom: 2px solid #ddd; font-size: 15px; width: 98%; } class Stack { constructor () { this.stack = []; this.top = -1; } push (value) { this.top++; console.log( “Inserting Element: ” + value ); this.stack[ chúng tôi ] = value; } printElements(id) { let elements = “”; for(vari=0;i<=this.top;i++){ elements += this.stack[i] + ” “; } console.log( elements ); document.getElementById(id).innerHTML += elements; } isEmpty(){ return chúng tôi === -1; } } let myStack = new Stack(); myStack.push( 5 ); myStack.push( 10 ); myStack.push( 12); myStack.push( 20 ); myStack.push( 35 ); myStack.printElements(“result1”); document.getElementById(“result2”).innerHTML += myStack.isEmpty();

Output:

3. size

This method will return the size of the stack i.e. how many elements are present in the stack. As the Top variable holds the index at which the last element is stored, we can use this pointer to find out the size of the stack. As the indexing of array is from 0 we can add 1 to the Top and find out the size of the stack.

JavaScript Stack .body-data { border : #81D4FA 2px solid; background-color : #03a9f400; text-align : left; padding-left : 20px; padding-bottom: 20px; height : auto; width : auto; } .heading { font-weight: bold; border-bottom: 2px solid #ddd; font-size: 15px; width: 98%; } class Stack { constructor () { this.stack = []; this.top = -1; } push (value) { this.top++; console.log( “Inserting Element: ” + value ); this.stack[ chúng tôi ] = value; } printElements(id) { let elements = “”; for(vari=0;i<=this.top;i++){ elements += this.stack[i] + ” “; } console.log( elements ); document.getElementById(id).innerHTML += elements; } isEmpty(){ return chúng tôi === -1; } size() { return chúng tôi + 1; } } let myStack = new Stack(); myStack.push( 5 ); myStack.push( 10 ); myStack.push( 12); myStack.push( 20 ); myStack.push( 35 ); myStack.printElements(“result1”); document.getElementById(“result2”).innerHTML += myStack.isEmpty(); document.getElementById(“result3”).innerHTML += myStack.size();

Output:

4. pop

This method will remove the element from the stack. The removed element will be the top element from the stack. As the Top is pointing to the last element, the pop() operation will remove the element at this position. The Top will be decremented by 1 and will point to the element below the previous element.

Code:

JavaScript Stack .body-data { border : #81D4FA 2px solid; background-color : #03a9f400; text-align : left; padding-left : 20px; padding-bottom: 20px; height : auto; width : auto; } .heading { font-weight: bold; border-bottom: 2px solid #ddd; font-size: 15px; width: 98%; } class Stack { constructor () { this.stack = []; this.top = -1; } push (value) { this.top++; console.log( “Inserting Element: ” + value ); this.stack[ chúng tôi ] = value; } printElements(id) { let elements = “”; for(vari=0;i<=this.top;i++){ elements += this.stack[i] + ” “; } console.log( elements ); document.getElementById(id).innerHTML += elements; } isEmpty(){ return chúng tôi === -1; } size() { return chúng tôi + 1; } pop() { if(this.isEmpty()){ return “Stack is Empty”; } else { varval = this.stack[this.top]; this.top –; return val; } } } let myStack = new Stack(); myStack.push( 5 ); myStack.push( 10 ); myStack.push( 12); myStack.push( 20 ); myStack.push( 35 ); myStack.printElements(“result1”); document.getElementById(“result2”).innerHTML += myStack.pop(); myStack.printElements(“result3”);

Output:

5. peek

Code:

JavaScript Stack .body-data { border : #81D4FA 2px solid; background-color : #03a9f400; text-align : left; padding-left : 20px; padding-bottom: 20px; height : auto; width : auto; } .heading { font-weight: bold; border-bottom: 2px solid #ddd; font-size: 15px; width: 98%; } class Stack { constructor () { this.stack = []; this.top = -1; } push (value) { this.top++; console.log( “Inserting Element: ” + value ); this.stack[ chúng tôi ] = value; } printElements(id) { let elements = “”; for(vari=0;i<=this.top;i++){ elements += this.stack[i] + ” “; } console.log( elements ); document.getElementById(id).innerHTML += elements; } isEmpty(){ return chúng tôi === -1; } size() { return chúng tôi + 1; } pop() { if(this.isEmpty()){ return “Stack is Empty”; } else { varval = this.stack[this.top]; this.top –; return val; } } peek() { if(this.isEmpty()){ return “Stack is Empty”; } else { varval = this.stack[this.top]; return val; } } } let myStack = new Stack(); myStack.push( 5 ); myStack.push( 10 ); myStack.push( 12); myStack.push( 20 ); myStack.push( 35 ); myStack.printElements(“result1”); document.getElementById(“result2”).innerHTML += myStack.peek(); myStack.printElements(“result3”);

Output:

6. clear

This method will clear all the elements in the stack. This method will reset the stack pointer i.e Top to -1 and all the elements from the stack will be cleared out. isEmpty() method should return true after this operation.

Code:

JavaScript Stack .body-data { border : #81D4FA 2px solid; background-color : #03a9f400; text-align : left; padding-left : 20px; padding-bottom: 20px; height : auto; width : auto; } .heading { font-weight: bold; border-bottom: 2px solid #ddd; font-size: 15px; width: 98%; } class Stack { constructor () { this.stack = []; this.top = -1; } push (value) { this.top++; console.log( “Inserting Element: ” + value ); this.stack[ chúng tôi ] = value; } printElements(id) { let elements = “”; for(vari=0;i<=this.top;i++){ elements += this.stack[i] + ” “; } console.log( elements ); document.getElementById(id).innerHTML += elements; } clear() { this.top=-1; return “Stack Cleared”; } } let myStack = new Stack(); myStack.push( 5 ); myStack.push( 10 ); myStack.push( 12); myStack.push( 20 ); myStack.push( 35 ); myStack.printElements(“result1”); document.getElementById(“result2”).innerHTML += myStack.clear(); myStack.printElements(“result3”);

Output:

Recommended Articles

This is a guide to JavaScript Stack. Here we also discuss the definition and Javascript stack methods along with different examples and their code implementation. You may also have a look at the following articles to learn more –

How To Print Object Array In Javascript?

In this tutorial, we will learn how to print object arrays in JavaScript.

What is an object array or an array of objects? An array of objects is used to store a fixed-size sequential collection of identical elements and store many values in one variable.

Next, we will see the options to print an array of objects in JavaScript.

Using the stringify() Method of the JSON Object

Users can follow the syntax below to use this.

Syntax JSON.stringify(v,r,s)

In the syntax above, the last two parameters are optional.

Parameters

v − This is the array of objects.

r − This is the replacer. It can change the output by altering or eliminating values. The method will print all values if the r value is null or unspecified. Either a function or an array is used as a replacer.

s − This is the spacing value for the output display. It is for readability purposes. Nothing, null, string, or 1-10 are the possible values of this parameter. If the value is less than 1, JSON print will not have space. If the value is greater than 10, 10 only is taken for indentation. If the value is a string, either the string or the first ten characters of the string are considered for spacing.

Example

Here in this code, we are taking an array of objects. JSON.stringify() is called directly with this value. Here, the indentation is 1. A condition is given to display the name key alone from the JSON object. This is the second parameter.

let

arr

=

[

{

name

:

“Orange”

,

value

:

1

}

,

{

name

:

“Grapes”

,

value

:

2

}

,

{

name

:

“Apple”

,

value

:

3

}

]

;

document

.

getElementById

(

“idPrint”

)

.

innerHTML

=

JSON

.

stringify

(

arr

,

null

,

4

)

;

Using console.table() Method

Here we will learn how the console.table() method works. This method strictly needs one input. The input is either an array or an object. The method also processes nested cases of both the array and the objects. The second parameter is the column, which is optional.

All browsers that use standard consoles support this method, and Internet Explorer does not support it.

Users can follow the syntax below to use this.

Syntax console.table(d, c)

In the syntax above, we need to give the array of objects as the first input.

Parameters

d − An array of objects.

c − Here, we need to specify the key names of the object. The specified key’s keyvalue pairs only will is displayed in the output.

Example

We are creating an array of objects in this example program using the new method. This data is given as the first parameter to the console.table() method.

Here, three objects are there in the input. But we have restricted to display of only two in the table format. The key names of the required objects are given as the second parameter. The console.log() method with the program title in the first parameter and the CSS values as the next parameters display the styled title in the following output.

Users need to open the console to see the output for the below example.

function

infoDisp

(

id

,

name

,

job

)

{

this

.

Id

=

id

;

this

.

Name

=

name

;

this

.

Work

=

job

;

}

const

a

=

new

infoDisp

(

1

,

“John”

,

“Doctor”

)

;

const

b

=

new

infoDisp

(

2

,

“Grace”

,

“Homemaker”

)

;

const

c

=

new

infoDisp

(

3

,

“Eagan”

,

“Not working”

)

;

console

.

log

(

%

cThe JavaScript program prints an array

of

objects using

%

cconsole

.

table

(

)

method

‘, ‘

font

weight

:

bold

;

font

size

:

16

px

;

color

:

#

000000

;

‘, ‘

font

weight

:

bold

;

font

style

:

italic

;

font

size

:

16

px

;

color

:

#

000000

;

)

;

console

.

table

(

[

a

,

b

,

c

]

,

[

“Name”

,

“Work”

]

)

;

This tutorial helped us to learn about the two ways to print an object array. We use the console.dir() generally to verify the object array. To display the object array on the page, JSON.stringify() is used.

We can use the console if we need the table format of the object array.table() method. The only drawback is that some consoles do not support this method. Some console displays the column names in ascending order. That is, the actual object key order is lost.

In short, both methods are simple. Users have choice to choose any method according to their print requirements.

How To Combine Javascript & Seo With Isomorphic Js

SEO for JavaScript-based websites (built with AngularJS, jQuery, ReactJS, etc.) requires a lot of knowledge, development, testing, and is notoriously difficult to get right. But let’s face it, even with all those problems, JavaScript is here to stay. It lets you create fast, dynamic, and beautiful websites focused on delivering a great user experience.

Google vs. JavaScript

We can clearly see that, in the last year, Google focused mostly on supporting user experience and performance. We can see that in Google AMP websites focused on lighting fast performance, Single Page Apps (SPA), or Progressive Web Apps.

Google claims that they now are much better at crawling and indexing JavaScript. Unfortunately, current results are still far from good. There are plenty examples confirming this, one of which is chúng tôi JavaScript SEO fail.

This is why SEOs usually lean towards a mix of traditional server-side rendering and small pieces of JavaScript added to the browser as a universal solution, which makes applications crawlable and indexable by search engines.

Unfortunately, this isn’t perfect as it is often hard to maintain and not all applications can be implemented this way (the complex ones). The user experience also isn’t all that great because it takes some time to load all the JavaScript libraries and bootstrap the application.

An alternative is to use pre-rendering services that run your JavaScript application/website and record the HTML output, which can then be served to crawlers using an extra piece of software running on your server. The benefit of this approach is that, in theory, you can pretend that the problem doesn’t exist and build your application in JavaScript any way you want.

Unfortunately, in practice, this doesn’t always work and requires complex debugging to fix. On top of that, it’s yet another piece of the application stack to maintain, and there may be compatibility issues with your application, causing the caught HTML output to be incorrect. This is an issue because it may be hard to notice any resulting SEO problems until it’s too late and your rankings are affected.

As you can see, it can all get quite complicated.

What if there was a hybrid that can connect all the perks of fast and dynamic JavaScript with an easy-to-crawl HTML/CSS? Fortunately, there is a new kid on the block, and it is called Isomorphic applications.

Isomorphic applications (also called universal applications) solve the problem of crawling and indexing by performing an initial render on the server and then using that HTML as a base for bootstrapping the JavaScript application in the browser. The Isomorphic approach takes the best of two worlds (static HTML and JavaScript), providing fully indexable, fast, and user-friendly websites.

How Does It Work?

This isomorphism means that the very same JavaScript code used by your application can be run on both the server and the client (in browser).

Thanks to this feature, you can feed your application with some data coming from the database on the server, run it, and capture the resulting HTML output that would normally require a browser to assemble. This output can then be served as your initial HTML to everyone who requests it (including crawlers, such as the Google Bot).

Your application can then use this HTML as a base for itself and continue operating on it in the browser as if it were rendered by the browser in the first place.

Benefits of Isomorphic Applications Search Engine Indexability

Web crawlers have a lot of difficulties crawling and indexing JavaScript content (and some of them still don’t even try). Crawlers analyze raw code without processing or rendering it. What you see in your browser is processed, rendered content. Rendering, processing DOM, etc. requires much more computing power and is much more complex than just analyzing plain text, so it would make crawling way more expensive for search engines.

Isomorphic applications solve this problem by executing code on the server to render static pages and then leaving all the JS responsible for user interactions to be run by the browser (user).

As a result, the crawler sees the exact same output the browser sees, which completely solves the SEO indexing problem. All the content is rendered and it is there when a search engine accesses the page.

Perceived Load Time is Faster

By rendering application markup on the server-side, there is no need for the majority of AJAX calls and there is less rendering happening on the client side (due to initial rendering on the server). This decreases perceived load time by around 40%.

There’s No Such Thing As a Free Lunch

As this famous saying suggests — nothing comes for free. The isomorphic approach is great since it solves the SEO indexing problems, results in faster load times, and simplifies the application stack (as compared to using pre-rendering services). Also, it can bring benefits for large code bases (easier to maintain, client and server code get separated, etc.). However, it comes at a price.

You Are Forced to Use Certain Technologies

First and foremost, your server needs to support running NodeJS applications (for server-side rendering of JavaScript).

On top of that, the application framework you use to build your application has to support this approach, too (but the key ones do or have plugins that do — Angular JS, React JS). As you see there is no Ruby on Rails or Django on the list. Those frameworks can’t be used to build isomorphic JavaScript applications, but they can be used to build APIs that power those JavaScript applications, which is a great way to separate the data-processing code from the user interface powered by JavaScript.

All this means is that this approach is not very well-suited for existing projects, as it’s not a plug-and-play solution. It can work well with existing applications if they rely heavily on the APIs, yet would still require a significant amount of work to implement.

You Need Expertise

This is still a fairly new approach, very different from the older ones (e.g. the server-side rendering/jQuery mix), that requires cutting edge technology. As a result, you need developers who are up for the job and are comfortable working with these new technologies; developers who are not afraid to experiment and get their hands dirty.

Sometimes the ready-made libraries don’t play well together, sometimes you need to solve problems yourself, and you need the necessary experience to get the application to the finish line.

Getting Started With Isomorphic JavaScript

While the isomorphic approach is not yet widely popular, it’s gaining a lot of traction. At this point, it’s probably the best way to build a large, dynamic application that requires great, smooth user experience while not compromising on SEO.

It’s probably not a great idea for small projects because it requires a lot of engineering and experience to get right, but this will get easier over time as new libraries and tools are developed that take care of the more complex parts of the process.

Overall, it’s a very promising way of solving the SEO indexing problem that’s been bugging the community for years. If you’re building a new, large application that requires great SEO compatibility, you should definitely consider it.

SEOs & Developers

While doing research for this article, I realized that despite what we (SEOs) think, the community of developers is really excited about creating SEO-friendly websites based on JavaScript.

I think we need to start tapping into the potential of isomorphic JavaScript and other awesome new technologies. Special thanks to Kamil Grymuza who helped me a lot with this research (and actually co-wrote this article with me). I want to write more articles about JS and SEO soon, as there are tons of interesting topics to cover.

Image Credits

How To Find Unique Characters Of A String In Javascript?

In this tutorial, we will see different approaches to finding unique characters in a string. Simply say when a character once occurred in the string then it will not be included in the string again.

Example

Input

Output

Method 1: Using the Set

So, in this approach, we will use a set data structure as you know it contains only unique elements inside it. So, we will take input from the user then we will convert that into an array by splitting then we will create a new set and put all the elements into that and again we will take back all the elements from the set to string and it will be containing only unique elements.

Syntax

Following is the syntax to find unique characters of a string:

val1

=

val1

.

split

(

""

)

val1

=

new

Set

(

val1

)

val1

=[...

val1

].

join

(

""

)

Algorithm

STEP 1 − Create a variable and assign a string. Alternative assign the string value taken from user input.

STEP 2 − Apply the split(“”) method on the string to split it into an array of characters.

STEP 3 − Define a new set passing the array of characters as the argument. The new set will contain only unique characters.

STEP 4 − Join the characters from the set to create again a string.

STEP 5 − Display the string.

Example

Let’s see the program to find unique characters of a string using Set.

function

calculate

(

)

{

val1

=

document

.

getElementById

(

‘val1’

)

.

value val1

=

val1

.

split

(

“”

)

val1

=

new

Set

(

val1

)

val1

=

[

val1

]

.

join

(

“”

)

document

.

getElementById

(

‘calcOutput’

)

.

innerHTML

=

val1

}

Method 2: Loop with the indexOf() Method

We will take a variable and while iterating through the string we will check for the current character if it is occurring the first time that means the character at that position is -1 in the string then we will include that character else we will ignore it.

Syntax

Following is the syntax to find unique characters of a string using indexOf() method:

for

(

var

i

=

0

;

i

<

val1

.

length

;

i

++){

if

(

UniqueAns

.

indexOf

(

val1

.

charAt

(

i

))==-

1

)

UniqueAns

=

UniqueAns

+

val1

[

i

];

}

Example

In the following program, we use the indexOf() method to find the unique characters in the string.

function

calculate

(

)

{

val1

=

document

.

getElementById

(

‘val1’

)

.

value

var

UniqueAns

=

“”

;

for

(

var

i

=

0

;

i

<

val1

.

length

;

i

++

)

{

if

(

UniqueAns

.

indexOf

(

val1

.

charAt

(

i

)

)

==

1

)

UniqueAns

=

UniqueAns

+

val1

[

i

]

;

}

document

.

getElementById

(

‘calcOutput’

)

.

innerHTML

=

UniqueAns

}

Method 3: Using Loop with includes() Method

This is similar to the above approach but here we will use the includes method to check if the string contains the current char if it returns true then ignore it else if the function returns false it means we have visited this char for the first time so include it.

Syntax

Following is the syntax to find unique characters of a string:

for

(

var

i

=

0

;

i

<

val1

.

length

;

i

++){

if

(

UniqueAns

.

includes

(

val1

[

i

])==

false

)

UniqueAns

=

UniqueAns

+

val1

[

i

];

}

Example

In the following program, we use the includes() method to find the unique characters in the string.

function

calculate

(

)

{

val1

=

document

.

getElementById

(

‘val1’

)

.

value

var

UniqueAns

=

“”

;

for

(

var

i

=

0

;

i

<

val1

.

length

;

i

++

)

{

if

(

UniqueAns

.

includes

(

val1

[

i

]

)

==

false

)

UniqueAns

=

UniqueAns

+

val1

[

i

]

;

}

document

.

getElementById

(

‘calcOutput’

)

.

innerHTML

=

UniqueAns

}

How To Differentiate Between Manual And Automated Animation In Javascript?

Generally, animation in JavaScript is done to get different effects and make the object move around the page. You can move and animate any type of HTML element using manual or automated animations in JavaScript.

In this tutorial, we will learn how to differentiate between manual and automated animation in JavaScript.

Manual Animation

Before explaining the difference between the two common types of animation used in JavaScript, we must learn the process of animating objects manually.

Under Manual Animation, the animation process is not automated. The following is the implementation of a simple animation using DOM object properties and JavaScript functions as follows. The following list contains different DOM methods.

We are using the JavaScript function getElementById to get a DOM object and then assigning it to a global variable imgObj

We have defined an initialization function init() to initialize imgObj where we have set its position and left attributes

We are calling the initialization function at the time of window load.

Finally, we are calling moveRight() function to increase the left distance by 10 pixels. You could also set it to a negative value to move it to the left side.

Steps

Step 1 − Choose or decide the object or image that needs to be animated manually by the user.

Step 2 − Decide the position and size of the elements.

Example

The following example shows how to create objects or add images that can be moved or animated manually using the moveRight() or moveLeft() functions.

var

imgObj

=

null

;

function

init

(

)

{

imgObj

=

document

.

getElementById

(

‘myImage’

)

;

imgObj

.

style

.

position

=

‘relative’

;

imgObj

.

style

.

left

=

‘0px’

;

}

function

moveRight

(

)

{

imgObj

.

style

.

left

=

parseInt

(

imgObj

.

style

.

left

)

+

10

+

‘px’

;

}

window

.

onload

=

init

;

Automated animation

Automated animation creates better and more user-friendly software and online games. The main benefit of using automated animation is setting the time for certain effects or movements of the objects.

We will automate the process discussed in the manual animation. We can automate this process by using the JavaScript function setTimeout() as follows −

Here we have added more methods. So let’s see what is new here −

The moveRight() function is calling setTimeout() function to set the position of imgObj.

We have added a new function stop() to clear the timer set by setTimeout() function and to set the object at its initial position.

Steps

Step 1 − Find or create the object that will be used for automated animation.

Step 2 − Choose the initial style and position of the object..

Step 3 − Add a button, if required, to start and stop the animation process.

Step 4 − Determine the time or position where the animation needs to stop or restart.

Example

You can see from the following example that an object can stop animation automatically at a certain point. This example can be used to experiment and find out the scope of automated animation in JavaScript

var

imgObj

=

null

;

var

animate

;

function

init

(

)

{

imgObj

=

document

.

getElementById

(

‘myImage’

)

;

imgObj

.

style

.

position

=

‘relative’

;

imgObj

.

style

.

left

=

‘0px’

;

}

function

moveRight

(

)

{

imgObj

.

style

.

left

=

parseInt

(

imgObj

.

style

.

left

)

+

10

+

‘px’

;

animate

=

setTimeout

(

moveRight

,

20

)

;

}

function

stop

(

)

{

clearTimeout

(

animate

)

;

imgObj

.

style

.

left

=

‘0px’

;

}

window

.

onload

=

init

;

How do we differentiate between manual and automated animation?

Step 1 − Find out if you have to make manual changes to get the results.

Step 2 − Check the time limit of the animation.

JavaScript Animation with the movement of the mouse

You can see various animations with the movement of the mouse. While creating responsive buttons, images, and other elements, we commonly use JavaScript. In this method, you will see how the image size changes with the movement of the mouse over the element.

Syntax

The following syntax shows how to change the elements using onMoveOver and onMoveOut user behaviors.

if(document.images){ var animation1 = new Image(); var animation2 = new Image(); } onMouseOver = animation2.src; onMouseOut = animation1.src; Example

The following example shows how an object can change its size or position with the movement of the mouse over the element.

if

(

document

.

images

)

{

var

animation1

=

new

Image

(

)

;

var

animation2

=

new

Image

(

)

;

}

<

a id

=

SVG

href

=

“#”

onMouseOver

=

“document.myImage.src=animation2.src;”

Using the above method, you can find the number of arguments that have been passed within a JavaScript function. You will see the output of the result by running this code.

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