Introduction to CSS Properties
CSS stands for Cascading Style Sheets and is responsible for how an HTML element looks on a webpage. It handles colors, sizes, fonts, and so much more. All these properties are written in rules in the style sheet of a webpage and gets applied to specific elements by targeting the class or ID of that element.
CSS is an incredibly powerful tool for web developers, as it allows them to customize the look and feel of a website with relative ease. It can be used to create complex layouts, add animations, and even create responsive designs that look great on any device. With the right knowledge and practice, CSS can be used to create stunning websites that are both visually appealing and functional.
To access any of the properties that are defined in the CSS of an element, you can use the
style property of that element. For example, if you wanted to get the background color of a div element with an ID of ‘example-div’, you could use:
document.getElementById('example-div').style.backgroundColor. This will return the value for the background color that is applied to it.
You can also use the
getComputedStyle() method to access the computed values of an element’s CSS properties. This method takes two parameters: the element you want to access and a pseudo-element. The pseudo-element is optional and can be used to access the style of a pseudo-element such as
Working with the Style Object
style object has many properties that you can use to get a range of different values from an element. This includes font sizes, colors, padding, margins, and more. You can also use the
style object to set new values on an element. For example if you wanted to set the font size of a div to 2em you would write:
document.getElementById('example-div').style.fontSize = "2em". This will then apply the new font size to the element.
In addition to setting font size, you can also use the
style object to set other properties such as background color, border width, and more. For example, if you wanted to set the background color of a div to blue, you would write:
document.getElementById('example-div').style.backgroundColor = "blue". This will then apply the new background color to the element.
Common Coding Practices for Retrieving CSS Properties
It is also important to use the correct syntax when retrieving CSS properties. For example, when using the getComputedStyle() method, you should always include the element’s ID or class name in the parentheses. Additionally, you should always use the correct case when writing the property name. This will ensure that the code is compatible with all browsers.
Troubleshooting Tips & Tricks