What is the difference between id and class - pjb

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But please remember, at the end the choice is always yours and as a seasoned web developer in Fort Worth Texas , I will just end up with this. Yes, you can use "class" and "id" together without any problems. The only recommendation is to always use unique "id" names. Never use the same "id" name more than once. Just exactly like in the example below. Not only this goes against the HTML standards but you can also create further problems with JavaScript and invalid code.

For instance, the example below will be invalid by HTML standards because you are using the same "id" value "golden" more than once.

Just keep this in mind, t is always better to keep rolling the existing ball than creating a new one if you know what I mean. Main difference between id and class in html Reality is, there is only one big main difference between "id" and "class" in HTML. How to use id once and class as many times you want First, let's take a look to what I mean with one being able to be used once and the other one as many times as you want.

Imaging that you have three paragraphs in HTML. Look how "id" names are not repeated, they are only used once. But here is the big but With today's browser technologies, you can actually use "id" names as many times as you want and you can repeat names without creating errors for the end users AKA your website visitors.

So you can actually do this as well. However please never do this, never repeat "id" names as it is wrong. So which one should I use? But not only that because when using JavaScript this can become problematic in some cases. So try to always use different "id" names. Yes, you can have two classes inside your HTML markup.

Value — Value is what is assigned to the property. For example, blue can be assigned to the property color. The programmer can define a style rule based on the id of the elements.

All the elements with the same id will be applied with the defined style. To select an element with a specific id, there should be a hash symbol followed by the id of the element.

Then, it applies the defined CSS rule to the h1 element. Therefore, the text Hello World will appear in color blue. The id is unique within the page. Therefore, the id selector is used for one unique element.

Similar to the id, the programmer can define the style rules based on the class of the element. All the elements with the same class will be applied with a defined style. To select an element with a specific class, there should be a. Then, it applies the defined CSS rule to all h1 elements. Therefore, the text Hello World 1 and Hello World 2 will appear in color blue. It is possible to use the same class on multiple elements. Therefore, the class selector is used for multiple elements. Furthermore, the usage of id is to apply styling to one specific element.

The usage of class is to apply styling to multiple elements. The main difference between id and class in CSS is that id is used to apply styling to one unique element while class is used to apply styling to multiple elements.