attr() is a CSS function that returns the value of a property. That means that you can define content in your html markup using any custom property and then fetch the value using attr(). It only works on the content property at the moment, but support for other properties are currently in the experimental stage.
An example should help explain. First, the HTML markup:
<span data-tooltip="Cascading Style Sheets">CSS</span>
And now the CSS:
[data-tooltip]::before {
content: attr(data-tooltip);
}
And with this you can create custom tooltips in pure CSS.
Browser Support
👉 Browser info is for properties other than content. attr() works across all browsers for content.
Can I Use css3-attr? Data on support for the css3-attr feature across the major browsers from caniuse.com.
Thanks for learning with the DigitalOcean Community. Check out our offerings for compute, storage, networking, and managed databases.
Alligator.io is a developer-focused resource that offers tutorials and insights on a wide range of modern front-end technologies, including Angular 2+, Vue.js, React, TypeScript, Ionic, and JavaScript.
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
Get paid to write technical tutorials and select a tech-focused charity to receive a matching donation.
Full documentation for every DigitalOcean product.
The Wave has everything you need to know about building a business, from raising funding to marketing your product.
Stay up to date by signing up for DigitalOcean’s Infrastructure as a Newsletter.
New accounts only. By submitting your email you agree to our Privacy Policy
Scale up as you grow — whether you're running one virtual machine or ten thousand.
Sign up and get $200 in credit for your first 60 days with DigitalOcean.*
*This promotional offer applies to new accounts only.