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What is CSS ID?

Updated: 8/10/2023
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11y ago

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An ID in CSS is identified by the octothorpe symbol (#). An ID in CSS references the ID attribute in HTML and they should have the same name. For example lets say I have the following code in my HTML:

<small id="copyright">Copyright &#169;2015 &#8212; David Trower. All Rights Reserved.</small>

Notice the id="copyright" on the <small> element? That is the ID. In CSS, if I want to stylize this element by referencing that ID I would use the following CSS code:

#copyright {

color: #9CBDDE;

}

Notice how what follows the octothorpe (#) symbol in the CSS code is the same as the value of the ID attribute in HTML (both are the word copyright). An ID is to be a unique identifier within a document. It should appear once, and only once, within a single document.

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8y ago
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9y ago

An ID is an attribute by which you can link to elements on the page. It could be done like:#id-name

{your-CSS}

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What is an HTML attribute which specifies a unique id for an element?

The "id" attribute specifies a unique ID for an element:Ids must be unique within the page (so no other elements that are ided as "firstParagraphOfGreatness".)Ids can be referenced in CSS like so:#firstParagraphOfGreatness {css rules here}


What is the proper syntax for changing the text color of a p element?

&lt;p style="color:#FFFFFF;"&gt;&lt;/p&gt; A: this is correct although it is better to store your CSS rules in separate files, which makes editing and changing CSS easier and allows for manipulating of the DOM nodes (in this case the P tag): CSS style for all P tags: p { style: color: red; } CSS style for one specific P tag: p#my-id { color: red; } HTML for the latter: &lt;p id="my-id"&gt;some text which is now red&lt;/p&gt; &lt;p&gt;this paragraph has the common formatting and won't be red&lt;/p&gt;


Can you set navigation bar content with CSS?

HTMLCreate an unordered list UL tag inside a DIV tag with an id of navBar in the HTML page!Item 1Item 2Item 3Item 4CSSInside of the CSS create a ID block called #navBar#navBar ul li {display: inline;padding-right: 5px;}


What is the difference between the Class attribute and the ID attribute in HTML and CSS?

An ID is used to define the style properties of a specific thing whereas a class is used to define something you may use multiple times. For instance, if you are going to make a loginbox you will use an id because you will only have one identical loginbox on the page whereas if you wanted every quote to be given the same style you would use a class, this would mean all elements with class=quote (after you define it in the CSS) would always style quotes to your needs. In short, you could use either as they have pretty much the same outcome, but organised CSS is good CSS so you are better off using classes and ID's as i have defined them above.


What is valid css?

Valid CSS is CSS that has been run through the W3C CSS checker and passed.

Related questions

How do you apply a style to an id in css?

The octothorpe or hash sign precedes the name of the ID attribute: HTML: &lt;div id="sidebar"&gt; CSS: #sidebar { color: red; }


How do you change page frame color?

You can change the page frame color in CSS. Mention the attribute by id and change its color in CSS.


How do you layer CSS elements above the HTML tooltip?

You can layer CSS element above HTML easily. It can be done as :&lt;style&gt; #id { ... } &lt;/style&gt;


What is an HTML attribute which specifies a unique id for an element?

The "id" attribute specifies a unique ID for an element:Ids must be unique within the page (so no other elements that are ided as "firstParagraphOfGreatness".)Ids can be referenced in CSS like so:#firstParagraphOfGreatness {css rules here}


What is the proper syntax for changing the text color of a p element?

&lt;p style="color:#FFFFFF;"&gt;&lt;/p&gt; A: this is correct although it is better to store your CSS rules in separate files, which makes editing and changing CSS easier and allows for manipulating of the DOM nodes (in this case the P tag): CSS style for all P tags: p { style: color: red; } CSS style for one specific P tag: p#my-id { color: red; } HTML for the latter: &lt;p id="my-id"&gt;some text which is now red&lt;/p&gt; &lt;p&gt;this paragraph has the common formatting and won't be red&lt;/p&gt;


Can you set navigation bar content with CSS?

HTMLCreate an unordered list UL tag inside a DIV tag with an id of navBar in the HTML page!Item 1Item 2Item 3Item 4CSSInside of the CSS create a ID block called #navBar#navBar ul li {display: inline;padding-right: 5px;}


What is an id attribute?

An id attribute is a unique identifier assigned to a specific HTML element on a webpage. It is used to uniquely identify the element, making it easier to target and manipulate using CSS or JavaScript.


How do you change the appearance of a textbox in PHP when it is disabled?

You could use CSS for that #texbox{ /* Properties here */ } &lt;textarea id="textbox"&gt;&lt;/textbox&gt;


What is the difference between the Class attribute and the ID attribute in HTML and CSS?

An ID is used to define the style properties of a specific thing whereas a class is used to define something you may use multiple times. For instance, if you are going to make a loginbox you will use an id because you will only have one identical loginbox on the page whereas if you wanted every quote to be given the same style you would use a class, this would mean all elements with class=quote (after you define it in the CSS) would always style quotes to your needs. In short, you could use either as they have pretty much the same outcome, but organised CSS is good CSS so you are better off using classes and ID's as i have defined them above.


How do CSS selectors work?

First, you have to define classes or IDs in your html content (for example, the area for your main content gets an id="content"). In your CSS, you can use #content (if it is an ID) or .content (if you specified class="content") to style it. Beware that IDs can be used only once in a HTML document whereas classes can be used multiple times.


How do you make a cascading style sheet?

Usually placed in the &lt;head&gt; area at the top of the webpage document, the CSS style sheet looks like this: &lt;style type="text/css" /&gt; tag/class/id { property: value; property:value; } &lt;/style&gt; The "tag" is what describes/gives properties to HTML tags, such as: &lt;b&gt;This text would be boldface.&lt;/b&gt; The "class" is what describes/gives properties to HTML tags if you include this into the tag, such as: &lt;div class="main"&gt;This text would have any properties/values described in the class up in the CSS.&lt;/div&gt; Also: in the CSS, the class is always behind a period. The "id" is similar to the "class," but id's give them a name, or identification. They can be used to move to a certain spot on a webpage, like this: &lt;a href="#id1"&gt;Click to go to ID #1&lt;/a&gt; &lt;a name="id1"&gt;The link above would take you to this text.&lt;/a&gt; Also: in the CSS and the "a href" url, the id is always behind a pound symbol (#). If this doesn't answer your questions, visit www.w3schools.com - it's a very helpful website.


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