To reduce the time that the user spends filling

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out various forms, to make this process more convenient and to avoid errors when entering data, web developers connect an attribute that allows the browser to autofill fields. The browser remembers information (passwords, credit card numbers, product names, addresses, etc.) and at the moment when the user fills out the form, it gives him recommendations based on similar data entered earlier. The person only has to choose from the list and accept the desired option.

Interaction with users
The actions of site visitors are accompanied by the appearance of various effects on the web page: the appearance or disappearance of any element on the site when clicking on it with the mouse, darkening philippines whatsapp number database of the background, etc. For example, when the user hovers the cursor over a menu item, a list of the site subsections included in it pops up.

Managing the content and styles of HTML elements
In addition to effects, users' steps on the site can be accompanied by changes in the appearance of elements (styles set in CSS). JS allows you to add HTML tags and attributes to them. In this way, you can change, for example, the font color.

Adding animation
HTML is responsible for page layout, CSS is responsible for the design of elements on the site, and JavaScript helps to animate the site and make objects move. Animation affects the user's feelings, creates a certain mood, and motivates them to take action. Online stores often use countdown timers until the end of a sale, which show every passing second that the buyer misses. Another example of JS animation is interactive weather forecast maps, which indicate areas where precipitation is expected.

Interactive weather forecast maps.
Performing mathematical operations
JavaScript allows you to create a program that will perform simple mathematical calculations for the user. For example, a buyer sees the total amount of the purchase in the basket of an online store. The program automatically adds up the cost of all selected goods, applies a discount and gives the result.

Performing mathematical operations.
Where JavaScript is used: examples
The most popular area of ​​JS application is web development. Most often, this programming language is chosen when it is necessary to add interactivity to a site, which is included in the creation of that part of the web resource with which the client interacts. However, if necessary, it can also be used in the backend. Let's look at the areas in which JavaScript has found itself:

Dynamic web pages — tooltips, falling snowflakes and other animations.