Css html two classes

Selectors are one of, if not, the most important parts of CSS. They shape the cascade and determine how styles are to be applied to elements on a page. Up until recently the focus of CSS never really touched on selectors. Occasionally there would be incremental updates within the selectors specification, but never any real ground breaking improvements.

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WATCH RELATED VIDEO: 04.2 - How to apply multiple CSS classes to the same HTML element

css two classes together

In this article, we are talking about ngClass in Angular only, not ng-class in angular. Two things we have to understand first are property binding and interpolation in Angular.

Let's take the placeholder attribute of input as an example. And property binding is just a less verbose way to achieve the same thing. Personally, I use property binding as much as I can. When it comes to ngClass , it supports three types of expression "return values": String , Array , and Object. Here is an example from the official documentation :.

All div elements above have two classes: first and second. Note that in the official documentation, there is a pair of single quotes in each of the object keys in the third example. But neither first nor second has a dash or space in it. So we can feel free to remove the quotes. In the fourth example, however, since the key is first second which has a space in between we need to add the single quotes.

Just a heads up — the value of ngClass doesn't have to be a literal, as shown above. Keep in mind that property binding evaluates its expression. So what is an expression?

Normally, an expression is something that represents a value, and a statement would do something without a return value. You're likely familiar with if statements, which are responsible for the control flow. Note that if statements don't have a return value. But we can't put an assignment expression in the property binding in Angular, which will throw an error saying that "Bindings cannot contain assignments".

We can't write an if statement in ngClass , due to the fact that it is a statement. But we can't use a ternary operator since this is an expression. For example, if we want the text in a table cell to have a class of red when its value is larger than 10 , and if not it should have a class of green , here is the code:.

And if we want to toggle a class based on a condition, we could make one of the expressions an empty string. For example, if we want to add an error class in a form when it is invalid, and to remove the error class when it is valid, we could do this:. But there is a less verbose way. Remember ngClass also supports an object as a value:. Another way to achieve the same thing is to use class binding.

This is ideal for a single class:. When we use object literals, the key represents the class that we are going to configure for the element, while the value represents whether the class should be applied to the element. Note that the key will be applied only when the value is truthy. In the above example, if coltrol. One more thing to note is that the computed property name syntax is not yet supported. But there is an open issue in the Angular official GitHub repo. So far so good.

But I'd like to point out that this is actually not ideal. Long story short, due to how ChangeDetection works in Angular, the above function getClassOf might run multiple times, even when we consider it unnecessary. That is way beyond the topic of this article, but you may check out this article if you'd like to know more. We can still achieve the same result without using a function.

With an object literal it looks like this:. Looks a bit verbose. Consider that there will be only one class applied to the element, so if we can transform our val first, that's ideal:. This means that for a val that is 1 , the class of the element will be first-element.

When we see consecutive numbers such as 1 , 2 and 3 , then we can consider using an array. This is because by subtracting 1 from each value, we get 0 , 1 and 2 , which are just the indices of an array:. A fun fact is that in ECMAScript, an array is just an object with quite a few extra properties and methods.

So you can do the above with an object as well:. Note that you can also achieve the above with nested ternary operators, which is something I always try to avoid. Before we wrap up, one thing worth mentioning is [class] notation. This is available starting from Ivy , which was introduced in Angular 9 as the default compiler and runtime. The [class] is almost backward-compatible with [ngClass] , with some discrepancies:.

Thanks for reading! Hopefully now you know how ngClass works and can use it with confidence. If this article was helpful, tweet it. Learn to code for free.

Get started. Search Submit your search query. Forum Donate. Xing Liu. Prerequisites — What is Property Binding? What is ngClass in Angular?

The Basics When it comes to ngClass , it supports three types of expression "return values": String , Array , and Object. How to Use ngClass in Angular So what is an expression? See this open issue. The value of [class] is not "deepwatched". See here. Conclusion Thanks for reading!

Xing Liu Read more posts by this author.


Can CSS have multiple classes?

In this article, you'll find some frequently-asked questions FAQs about CSS, along with answers that may help you on your quest to become a web developer. Browsers use the DOCTYPE declaration to choose whether to show the document using a mode that is more compatible with Web standards or with old browser bugs. Gecko-based browsers, have a third Almost Standards Mode that has only a few minor quirks. The id attribute assigns a name to the element it is applied to, and for valid markup, there can be only one element with that name. The class attribute assigns a class name to the element, and that name can be used on many elements within the page.

e.g.. This allows you to combine several CSS classes for one HTML element.

How to create a group of css multiple classes same style?

Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. I have a. I have attempted to create classes for this first and last but I think I've got it wrong somewhere:. Remember that you can apply multiple classes to an element by separating each class with a space within its class attribute. For example:. If you have 2 classes i.

Use CSS Class for Styling Elements With Matching Class Attributes

css html two classes

They look nearly identical, but the top one has no space between header and. This small difference makes a huge difference in what it does. Select all elements with the class name callout that are decendents of the element with an ID of header. The big point here is that you can target elements that have combinations of classes and IDs by stringing those selectors together without spaces. Target an element that has all of multiple classes.

I have a.

How do you select an element with two classes in CSS?

It is possible to assign an object two or more classes at the same time. Wordpress does this out of the box for images, for example. We used color coding of each class to detail each class applied to the image tag. To add multiple classes, simply separate each class with a space not a comma. In the case above, the image will use the rules for both "alignnone" and "size-full" as well as "wp-image

JavaScript classList

To express AND you simply concatenate your classes. Have a look at the official Documentation. CSS selector add css to next position after last match case of :not selector. CSS Selector that applies to elements with two classes. What are common classes, helper classes, and utility classes in CSS? Can a CSS selector "inherit" all declarations from another selector? UISwitch in accessory view of a tableviewcell, passing a parameter with the selector to have selector function see the indexpath.

You might have come across scenarios where you would want to add multiple CSS classes to an HTML element based on some condition.

“how to call two classes in css” Code Answer

If you already have some CSS classes in your site's theme, you can use them in the CSS class field to apply those styles to Shogun elements. Once an element is selected, this can be found at the bottom of the Styles tab. Just enter the class name as it would appear in the HTML, e. You don't need to include a leading dot in this field.

For CSS multiple selectors, when do you need a comma and when you only need a space?

In this tutorial, we are going to learn about how to conditionally add or remove multiple css class names to a react app. We can add a single class name to the react element by using the className attribute. If you want to add multiple class names, you can add it to the className attribute by separating with spaces. We can add a multiple class names to the react element conditionally; by using template literals, ternary operator.

Is it possible to change this text? I have created several classes for page editors to use, but no doubt they will forget them as the field here is just a text input field.

Understanding CSS classes vs. IDs

H TML elements can be assigned multiple classes by listing the classes in the class attribute, with a blank space to separate them. If the same property is declared in both rules, the conflict is resolved first through specificity, then according to the order of the CSS declarations. You just need a space between one or more class names. Yes, div can take as many classes as you need. Use space to separate one from another.

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In this article, we will stick to only two classes. But the concepts used in assigning two classes can be extended to multiple classes as well. You should add another feature.

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  1. Mazuzshura

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  2. Yisreal

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  3. Gelasius

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