These can be “if-something” conditions, cycles that create a certain sequence of actions, mathematical calculations, etc.
- Mathematical Operations
- Processing and validating data in HTML forms
- User interactions and events
- Interact with HTML elements on the page and manage their content and styles
Web pages often need to do some calculations. For example, there are two text fields, and you need to deduce the amount of two numbers in the first two in the third text field.
Another situation is to take some text lines on the web page; you need to increase its size by 1.5 times. This can be done with mathematical calculations by multiplying the current size by a factor of 1.5.
Processing and validating data in HTML forms
User interactions and events
There may be various effects on the web page, depending on what the user is doing. The drop-down menu on the site when hovering.
When you click on the hide button or show some item on the page. The pop-up appears when the mouse cursor has gone outside the browser window.
Interact with HTML elements on the page and manage their content and styles
When a particular event occurs (such as a click or whatever), you can change the items’ appearance (CSS styles) on the page. It’s all done programmatically. You can also add some HTML tags or attributes to them, also when an event occurs.