A data-* attribute on a <blockquote> tag attaches additional data to the quote.
To create a custom attribute, replace the * with a lowercase string, such as data-id, data-source, or data-location.
A custom data-speaker attribute on a <blockquote> tag.
The attribute value is not visible, but is readable by JavaScript.
And so, my fellow Americans: ask not what your country can do for you – ask what you can do for your country. My fellow citizens of the world: ask not what America will do for you, but what together we can do for the freedom of man.-- President Kennedy, 1961, Inaugural address
<acticle>
<blockquote data-speaker="John F. Kennedy">
And so, my fellow Americans: ask not what your country
can do for you – ask what you can do for your country.
My fellow citizens of the world: ask not what America
will do for you, but what together we can do for the
freedom of man.
</blockquote>
-- President Kennedy, 1961, Inaugural address
</article>
The data-* attribute adds custom information to a <blockquote> element.
The * part is replaced with a lowercase string, such as data-id, data-location, data-length, etc.
An <blockquote> element can have any number of data-* attributes, each with their own name.
Using data-* attributes reduces the need for requests to the server.
Note: The data-* attribute is not visible and does not change the appearance of the blockquote.
<blockquote data-*="value">
Note: The * can be any string, such as data-id, data-cost, data-supplier, etc.
| Value | Description |
|---|---|
| value | A string value. Can be numeric, alphanumeric, JSON, etc. |
A custom data-location attribute on a <blockquote> tag.
Clicking the button will display the location value.
And so, my fellow Americans: ask not what your country can do for you – ask what you can do for your country. My fellow citizens of the world: ask not what America will do for you, but what together we can do for the freedom of man.-- President Kennedy, 1961, Inaugural address.
<article>
<blockquote data-location="Washington, DC" id="kennedyquote">
And so, my fellow Americans: ask not what your country
can do for you – ask what you can do for your country.
My fellow citizens of the world: ask not what America
will do for you, but what together we can do for the
freedom of man.
</blockquote>
-- President Kennedy, 1961, Inaugural address.
</article>
<br /><br />
<button onclick="show();">Show data</button>
<script>
let show = () => {
let element = document.getElementById("kennedyquote");
alert("Location = " + element.getAttribute('data-location'));
}
</script>
The <blockquote> tag below contains the data-location attribute.
The data-location attribute specifies the location where the speach was delivered.
Clicks are handled by the onclick event.
Onclick invokes a JavaScript function that extracts and displays the location of the quotation.
Note: Notice that the location displays quickly without server call delay.
Here is when data-* support started for each browser:
 Chrome
|
1.0 | Sep 2008 |
 Firefox
|
1.0 | Sep 2002 |
 IE/Edge
|
1.0 | Aug 1995 |
 Opera
|
1.0 | Jan 2006 |
 Safari
|
1.0 | Jan 2003 |
Back to <blockquote>
