HTML Reference

HTML – Image Attributes

The img tag is used to place an image on an HTML page, and has multiple attributes that can be used within the img tag.

HTML Reference

HTML – Map Attributes

An image map is an image with specified sections mapped to accept different links. These are its attributes.

HTML Reference

HTML – Object Attributes

The object tag defines a container for an external resource such a web page, image, video, or animation.

HTML Reference

HTML – Parameter Attributes

The param tag is used to define parameters for an object element. These are the attributes for the param tag.

HTML Reference

HTML – Source Attributes

The source tag is used to specify multiple media resources for media elements. These are the attributes for the source tag.

HTML Reference

HTML – onerror Event

The onerror event fires when an error occurs while loading an external file like an img, object, link, or script.

HTML Reference

HTML – ImageMap Shapes

There are three “shapes” that can be used to define the clickable areas within an ImageMap.

CSS Tutorials

CSS – Backgrounds

The CSS background properties are used to add backgrounds and background effects to the HTML page and HTML elements.

CSS Tutorials

CSS – Opacity

The opacity of an element can be used to create effects such as elements fading in our out on hover, or changing opacity as a visual cue to the user.

CSS Tutorials

CSS – Floating an Element

The float property is used to position content by “floating” an element either to the left or right, and is often used to position an image next to text.

CSS Reference

CSS – backdrop-filter Property

The backdrop-filter property is used to apply a graphical effect to the area underneath an element that is partially transparent.

CSS Reference

CSS – background Property

The background property is a shorthand property for all the other properties a CSS background can be given.

CSS Reference

CSS – background-attachment Property

The background-attachment property determines whether the background image scrolls with the rest of the page or is fixed in place as the page scrolls.

CSS Reference

CSS – background-image Property

The background-image property sets one or more background images (with varying placement) for an element. The default placement is at the top-left corner.

CSS Reference

CSS – background-origin Property

The background-origin property specifies the positioning area of a background image (this property has no effect if the background-attachment is fixed).

CSS Reference

CSS – background-repeat Property

The background-repeat property sets how a background image will be repeated if at all. By default, it is repeated both vertically and horizontally.

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