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How can you apply a CSS variable to a specific element?

by EITCA Academy / Monday, 07 August 2023 / Published in Web Development, EITC/WD/HCF HTML and CSS Fundamentals, HTML and CSS extending skills, Creating variables in CSS, Examination review

To apply a CSS variable to a specific element, you can follow a few steps. First, you need to define the CSS variable using the `–` prefix followed by a name of your choice. For example, let's define a variable named `primary-color`:

css
:root {
  --primary-color: #ff0000;
}

In this example, we are defining the `primary-color` variable and setting its value to `#ff0000`, which represents red.

Next, you can apply the CSS variable to a specific element by using the `var()` function. This function takes the name of the variable as an argument and returns its value. For instance, let's apply the `primary-color` variable to a heading element:

css
h1 {
  color: var(--primary-color);
}

In this case, the `color` property of the `h1` element is set to the value of the `primary-color` variable, which is `#ff0000` (red).

By using CSS variables, you can easily change the value of a variable in one place, and it will automatically update all the elements that use that variable. This provides flexibility and makes it easier to maintain and update styles across your website.

You can also override the value of a CSS variable for a specific element or group of elements. For example, let's say you want to change the `primary-color` variable to blue for a specific section of your website:

css
.section {
  --primary-color: #0000ff;
}

In this case, the `primary-color` variable is redefined within the `.section` class, and its value is set to `#0000ff`, which represents blue. Any elements within the `.section` class will now use the blue color defined by the overridden variable.

To apply a CSS variable to a specific element, you need to define the variable using the `–` prefix, and then use the `var()` function to apply it to the desired element. You can also override the value of a CSS variable for specific elements or groups of elements.

Other recent questions and answers regarding Creating variables in CSS:

  • Why is it beneficial to use CSS variables when dealing with large websites?
  • What is the purpose of using the ":root" pseudo-element?
  • What is the syntax for creating a CSS variable?
  • How can CSS variables simplify the process of creating websites?

More questions and answers:

  • Field: Web Development
  • Programme: EITC/WD/HCF HTML and CSS Fundamentals (go to the certification programme)
  • Lesson: HTML and CSS extending skills (go to related lesson)
  • Topic: Creating variables in CSS (go to related topic)
  • Examination review
Tagged under: CSS, CSS Custom Properties, CSS Variables, HTML, Web Development
Home » Creating variables in CSS / EITC/WD/HCF HTML and CSS Fundamentals / Examination review / HTML and CSS extending skills / Web Development » How can you apply a CSS variable to a specific element?

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