View and change CSS
Complete these interactive tutorials to learn the basics of viewing and changing a page's CSS using Chrome DevTools.
View an element's CSS
Inspect Me!text below and select Inspect. The Elements panel of DevTools opens. The
Inspect Me!element is highlighted in the DOM Tree.
In the DOM Tree, find the value of the
data-messageattribute for the
Enter the value in the text box below.
The Styles tab on the Elements panel lists the CSS rules being applied to whatever element is currently selected in the DOM Tree, which should still be the
Inspect Me!element in this case. Find the
alohaclass rule. The fact that you see this rule means that it's being applied to the
alohaclass is declaring a value for
padding. Enter that value in the text box below.
Figure 1. The inspected element is highlighted blue in the DOM Tree
If you'd like to dock your DevTools window to the right of your viewport, like you see in Figure 1, see Change DevTools placement.
Figure 2. CSS classes being applied to the selected element, such as
aloha, are displayed in the Styles tab
Add a CSS declaration to an element
Use the Styles tab when you want to change or add CSS declarations to an element.
Add A Background Color To Me!text below and select Inspect.
Add A Background Color To Me!
element.stylenear the top of the Styles tab.
background-colorand press Enter.
honeydewand press Enter. In the DOM Tree you can see that an inline style declaration was applied to the element.
Figure 3. The
background-color:honeydew declaration has been applied to the element via the
element.style section of the Styles tab
Add a CSS class to an element
Use the Styles tab to see how an element looks when a CSS class is applied to or removed from an element.
Add A Class To Me!element below and select Inspect.
Add A Class To Me!
Click .cls. DevTools reveals a text box where you can add classes to the selected element.
color_mein the Add new class text box and then press Enter. A checkbox appears below the Add new class text box, where you can toggle the class on and off. If the
Add A Class To Me!element had any other classes applied to it, you'd also be able to toggle them from here.
Figure 4. The
color_me class has been applied to the element via the .cls section of the Styles tab
Add a pseudostate to a class
Use the Styles tab to permanently apply a CSS pseudostate to an element. DevTools supports
:visited, and others.
Hover over the
Hover Over Me!text below. The background color changes.
Hover Over Me!
Hover Over Me!text and select Inspect.
In the Styles tab, click :hov.
Check the :hover checkbox. The background color changes like before, even though you're not actually hovering over the element.
Figure 5. Toggling the
:hover pseudostate on an element
Change the dimensions of an element
Use the Box Model interactive diagram in the Styles tab to change the width, height, padding, margin, or border length of an element.
Change My Margin!element below and select Inspect.
Change My Margin!
In the Box Model diagram in the Styles tab, hover over padding. The element's padding is highlighted in the viewport.
Note: Depending on the size of your DevTools window, you may need to scroll to the bottom of the Styles tab to see the Box Model.
Double-click the left margin in the Box Model, which currently has a value of
-meaning that the element doesn't have a left-margin.
100and press Enter. The Box Model defaults to pixels, but it also accepts other values, such as
Figure 6. Hovering over the element's padding
Figure 7. Changing the element's left-margin