CSS Calling and Declaring Classes

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Okay, so I am slightly confused with declaring and calling a class in css. when I create a class it uses a "." but when I call it it doesn't, for example.

.smaller-image {
    width: 100px;

<a href="#"><img src="someimageurl.com" class="smaller-image" alt="some image 

CSS applies style to HTML elements using either their class, id or tag name (e.g. body).

When writing a CSS rule to apply to a class, you prefix the class name with ..

When writing a CSS rule to apply to an id, you prefix the id name with #. Note that an id should only be used by one element on a page, whereas a class can be used as often as you like.


div {} /* This is applied to all div elements */

.button {} /* This is applied to all elements with the `button` class */

#header {} /* This is applied to the element with the `header` id */

a.link {} /* This combines both the `a` tag and the `link` class */

How to Use Classes in CSS to Style an HTML Element – Beginner , Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java  CSS Syntax. A CSS rule-set consists of a selector and a declaration block: The selector points to the HTML element you want to style. The declaration block contains one or more declarations separated by semicolons. Each declaration includes a CSS property name and a value, separated by a colon.

The preceding dot defines it as a class in CSS, as opposed for example to a tag like div (no prefix at all) or a hash for an id (#something). In HTML all that is not needed, since the attributes are class , id or no attribute.

HTML Global class Attribute, CSS applies style to HTML elements using either their class , id or tag name (e.g. body ). When writing a CSS rule to apply to a class , you prefix  To define a function outside the class definition, you have to declare it inside the class and then define it outside of the class. This is done by specifiying the name of the class, followed the scope resolution :: operator, followed by the name of the function: Outside Example. class MyClass { // The class. public: // Access specifier.

In HTML, the class names are clearly class names because they are contained in the class attribute. They don't need anything else to make it clear they are class names.

In CSS, a selector can be made up of many things. IDs, element types, attribute names, attribute values -- and others! So you need something to make it clear that what you are using is a class name. The . character means "what comes next is a class name".

Can a CSS class inherit one or more other classes?, If you want to use a class, use a full stop (.) followed by the class name in a style block. Next, use a bracket called a declaration block that contains the property to stylize the element, such as text color or text size. CSS Classes will help you stylize HTML elements quickly. type 1 is actually very common when declaring multiple classes with some share the same attributes and some have their owned unique attributes. type 2 is a bit dirty to maintain while type 3 is similar to type 1. it is all works, just a matter of coding style and ease of maintenance

The name HTML stands for Hyper Text Markup Language, and it describes the structure of web pages using markup elements that represented by tags. Each tag can hold attribute(s).

The class attribute specifies one or more class names for an HTML element.

CSS stands for Cascading Style Sheets and it describes how HTML elements are to be displayed on screen (or in other media).

In CSS, to select HTML elements with a specific class, we use period (.) character, followed by the name of the class.

Hope this clarify your mind, and enjoy coding!

Edit: in your example you use .com as source. You can't. Read here for images format and support: https://en.m.wikipedia.org/wiki/Comparison_of_web_browsers#Image_format_support

The benefit of this is that you can have the same HTML element, but present it differently depending on its class or ID. In the CSS, a class selector is a name  Stack your classes: no one EVER uses this trick; you can apply as many css classes to a single tag as you want, just put spaces between the names, like will apply both the class exciting AND the class warning. this saves TONS of duplication in your CSS.

Select the element which has an ID of header and also a class name of callout. Maybe this graphic will make that more clear: #Combinations of Classes and IDs. CSS stands for C ascading S tyle S heets. CSS describes how HTML elements are to be displayed on screen, paper, or in other media. CSS saves a lot of work. It can control the layout of multiple web pages all at once. CSS can be added to HTML elements in 3 ways: Inline - by using the style attribute in HTML elements.

The CSS class selector matches elements based on the contents of their class attribute. I’d like to second Ed’s point (in post 15, above) that CSS does in fact care about the difference between IDs and classes, because an ID always has a higher specificity than a class. This means that if you have separate ID and class-based style declarations that both declare the same property for the same html element, the value from the ID

In CSS, pattern matching rules determine which style rules apply to elements in the document tree. (In HTML, the same as DIV[class~="warning"].) Class Document languages may contain attributes that are declared to be of type ID. Declaring and Using CSS Variables Variables should be declared within a CSS selector that defines its scope. For a global scope you can use the :root or body selector. The variable name must begin with two dashes (--) and is case sensitive, so "--main-color" and "--Main-Color" would define two different custom properties.

  • Welcome to Stack Overflow! It is very hard to tell what you are aiming for. May you please state that clearly as a conclusion of your question?
  • Yes, they answered my question, but when declaring the class there is a period at the beginning, but not when you're actually calling the class. That is what confused me for a moment. Love stack overflow though and how helpful everyone is
  • Okay, that makes sense, that waas actually really helpful, so the div {} applies to all div elements, and I am sure just to separate specific div's you just give it an id,
  • Thank you, I am just used to actual coding, to where if I create a class or object or variable like, var myVar = 15, then I can just call it by saying like if (myVar = 15) { console.log("Your Number is " + myVar); else { console.log("Your Number is Not 15); } which is a very basic example, but I am not used to created a variable or class and calling it with a different name, even though its just a . at the beginning, it just threw me off a little
  • I know what HTML and CSS were, definitely didn't answer my question at all lol