CLion brings powerful support for HTML that includes syntax and error highlighting, formatting according to the code style, structure validation, code completion, on-the-fly preview during a debugging session (Live Edit) or in the dedicated preview tab in the code editor, and much more.
HTML specification is configurable with the Default HTML language level preference on the Languages and Frameworks | Schemas and DTDs page of the Settings/Preferences Ctrl+Alt+S. By default, specification HTML 5.0 from W3C is assumed.
Creating an HTML file
From the main menu, select HTML File from the list. CLion creates a stub file based on the HTML file template and opens it in the editor., and then select
Creating references in an HTML file
<img> tag, CLion suggests completion for the path to the file you are referencing.
<img> tags inside
<img> tags, CLion also generates the
Wrapping a code fragment in a tag
Select the code fragment to wrap and press Ctrl+Alt+T or selectfrom the main menu.
From the list, select Wrap with Tag. CLion encloses the selection in a pair of brackets (
Type the tag inside the opening brackets
<>. CLion automatically fills in the tag in the closing brackets
Learn more from Code generation.
For most HTML tags and attributes CLion can show you a summary from the corresponding MDN article. This summary is displayed in the Documentation popup which also shows the deprecation status of a tag or an attribute and information on its compatibility with various browsers.
If the tag or the attribute is available in all versions of browsers, CLion does not show any information about its compatibility.
Otherwise, the Documentation popup also lists the browsers and their versions that support the tag or the attribute.
If the tag or the attribute is deprecated, the popup also informs you about this status.
View documentation for a tag or an attribute
Position the caret at the tag or the attribute and press Ctrl+Q or selectfrom the main menu.
When you hover the mouse pointer over a tag or an attribute, CLion immediately displays the reference for it in the Documentation popup.
You can turn off this behavior or configure the popup to appear faster or slower, see Configuring the behavior of Documentation popup below.
Configure the behavior of Documentation popup
To turn off showing documentation automatically, open the Settings/Preferences dialog Ctrl+Alt+S, go to , and clear the Show quick documentation on mouse move checkbox.
To have the Documentation popup shown faster or slower, open the Settings/Preferences dialog Ctrl+Alt+S, go to , then select the Show the documentation popup checkbox and specify the delay time.
Open the MDN documentation for tags and attributes in the browser
In the Documentation popup Ctrl+Q, click the link at the bottom.
Press Shift+F1 or selectfrom the main menu.
Previewing output of an HTML file
You can open the output of your HTML code in the built-in CLion preview or externally, in a browser of your choice.
Open the CLion built-in preview
From the main menu, select, and then select from the list.
Alternatively, hover your mouse pointer over the code to show the browser icons popup, and click .
To make sure your HTML code is rendered properly in production environment, preview HTML files in specific browsers.
Preview an HTML file in a browser
From the main menu, select, and then select the desired browser from the list.
To open the CLion default browser, select Default.
Alternatively, hover your mouse pointer over the code to show the browser icons popup, and click the icon that indicates the desired browser:
If you have only one browser configured, just press Alt+F2.
Configure the browser icons in the popup
Open the Settings/Preferences dialog Ctrl+Alt+S and go to .
To hide some of the icons, clear the Active checkboxes for the unnecessary browsers.
To hide the whole popup, clear the For HTML files checkbox.
Viewing HTML source code of a web page in the editor
Press Ctrl+Shift+A and select Open Source Code from URL... from the list.
In the Open URL dialog that opens, type the URL address of the web page or choose a previously opened URL from the list.
Viewing embedded images
View images in CLion
Select the image file in the Project tool window and press F4.
Alternatively, position the caret at the reference to the image in the editor and press Ctrl+B
To preview an image in a popup instead of in a separate tab, select the reference to it and press Ctrl+Shift+I
View images in an external editor
Select the image file in the Project tool window, and select or press Ctrl+Alt+F4.
CLion opens the image in the editor that is used in your OS by default. You can configure another image editor in which the IDE will open files.
Change the default external editor
Right-click an image in the editor and select Edit Path to External Editor from the context menu.
You can also press Ctrl+Shift+A and type
Edit Path to External Editor.
In the Path to External Editor dialog, specify the path to the application in which you want to open images and click Save.
Extracting an include file
<script> tags can be extracted as well. CLion also suggests adding references instead of duplicates of the selected fragment.
In the editor, select the code block to be extracted and choosefrom the main menu or from the context menu of the selection.
In the Extract Include File dialog that opens, specify the name of the include file without the extension and the directory to store it in. You can accept the predefined directory or select another one.
Click OK, when ready. CLion extracts the selected source code into the specified file in the target directory and generates the corresponding reference in the source file.
Configuring syntax highlighting
You can configure HTML-aware syntax highlighting according to your preferences and habits.
In the Settings/Preferences dialog Ctrl+Alt+S, go to .
Select the color scheme, accept the highlighting settings inherited from defaults or customize them as described in Colors and fonts.