Css html background on top of background

TL;DR — Responsive images refer to images that properly adjust to different screen sizes, resolutions, positions, and other factors. Since the majority of websites are responsive , you should avoid adding static images to pages. Responsive web design resizes or changes the orientation of the window without losing content quality. Images scale responsively after you set certain CSS width properties. There are three main methods for styling CSS background images.

We are searching data for your request:

Wait the end of the search in all databases.
Upon completion, a link will appear to access the found materials.

Content:

• CSS background images
• How to change background image opacity using CSS
• CSS background-position Property
• How to Implement a Background Image in HTML
• Creating Image Overlays with CSS Multiple Backgrounds
• The Best Looking CSS Animated Background Examples
• CSS Code to Add Image Which Covers Half of Page Background

CSS background images

CSS is designed to enable the separation of presentation and content, including layout , colors , and fonts. Separation of formatting and content also makes it feasible to present the same markup page in different styles for different rendering methods, such as on-screen, in print, by voice via speech-based browser or screen reader , and on Braille-based tactile devices. CSS also has rules for alternate formatting if the content is accessed on a mobile device.

The name cascading comes from the specified priority scheme to determine which style rule applies if more than one rule matches a particular element. This cascading priority scheme is predictable. CSS has a simple syntax and uses a number of English keywords to specify the names of various style properties. A style sheet consists of a list of rules. Each rule or rule-set consists of one or more selectors , and a declaration block. In CSS, selectors declare which part of the markup a style applies to by matching tags and attributes in the markup itself.

Classes and IDs are case-sensitive, start with letters, and can include alphanumeric characters, hyphens, and underscores. A class may apply to any number of instances of any elements. An ID may only be applied to a single element. Pseudo-classes are used in CSS selectors to permit formatting based on information that is not contained in the document tree. One example of a widely used pseudo-class is : hover , which identifies content only when the user "points to" the visible element, usually by holding the mouse cursor over it.

It is appended to a selector as in a : hover or elementid : hover. A pseudo-class classifies document elements, such as : link or : visited , whereas a pseudo-element makes a selection that may consist of partial elements, such as :: first-line or :: first-letter.

Selectors may be combined in many ways to achieve great specificity and flexibility. The order of the selectors is important. For example, div. This is not to be confused with concatenated identifiers such as div. The following table provides a summary of selector syntax indicating usage and the version of CSS that introduced it. A declaration block consists of a list of declarations in braces. Each declaration itself consists of a property , a colon : , and a value.

If there are multiple declarations in a block, a semi-colon ; must be inserted to separate each declaration. An optional semi-colon after the last or single declaration may be used. Properties are specified in the CSS standard. Each property has a set of possible values. Some properties can affect any type of element, and others apply only to particular groups of elements. Color values can be specified with keywords e. Some units — cm centimetre ; in inch ; mm millimetre ; pc pica ; and pt point — are absolute , which means that the rendered dimension does not depend upon the structure of the page; others — em em ; ex ex and px pixel [ clarification needed ] — are relative , which means that factors such as the font size of a parent element can affect the rendered measurement.

These eight units were a feature of CSS 1 [13] and retained in all subsequent revisions. All font colors, background styles, element alignments, borders and sizes had to be explicitly described, often repeatedly, within the HTML. CSS lets authors move much of that information to another file, the style sheet, resulting in considerably simpler HTML. For example, headings h1 elements , sub-headings h2 , sub-sub-headings h3 , etc. In print and on the screen, choice of font , size , color and emphasis for these elements is presentational.

Before CSS, document authors who wanted to assign such typographic characteristics to, say, all h2 headings had to repeat HTML presentational markup for each occurrence of that heading type. This made documents more complex, larger, and more error-prone and difficult to maintain. CSS allows the separation of presentation from structure. CSS can define color, font, text alignment, size, borders, spacing, layout and many other typographic characteristics, and can do so independently for on-screen and printed views.

CSS also defines non-visual styles, such as reading speed and emphasis for aural text readers. The advantages of this may not be immediately clear but the power of CSS becomes more apparent when the style properties are placed in an internal style element or, even better, an external CSS file. For example, suppose the document contains the style element:. All h1 elements in the document will then automatically become red without requiring any explicit code.

If the author later wanted to make h1 elements blue instead, this could be done by changing the style element to:. The styles can also be placed in an external CSS file, as described below, and loaded using syntax similar to:. This further decouples the styling from the HTML document and makes it possible to restyle multiple documents by simply editing a shared external CSS file.

CSS information can be provided from various sources. These sources can be the web browser, the user, and the author.

The information from the author can be further classified into inline, media type, importance, selector specificity, rule order, inheritance, and property definition.

Multiple style sheets can be imported. Different styles can be applied depending on the output device being used; for example, the screen version can be quite different from the printed version, so that authors can tailor the presentation appropriately for each medium. The style sheet with the highest priority controls the content display. Declarations not set in the highest priority source are passed on to a source of lower priority, such as the user agent style.

The process is called cascading. One of the goals of CSS is to allow users greater control over presentation. Someone who finds red italic headings difficult to read may apply a different style sheet. Depending on the browser and the web site, a user may choose from various style sheets provided by the designers, or may remove all added styles and view the site using the browser's default styling, or may override just the red italic heading style without altering other attributes.

Specificity refers to the relative weights of various rules. Based on specification, a simple selector e. H1 has a specificity of 1, class selectors have a specificity of 1,0, and ID selectors a specificity of 1,0,0. Because the specificity values do not carry over as in the decimal system, commas are used to separate the "digits" [17] a CSS rule having 11 elements and 11 classes would have a specificity of 11,11, not Inheritance is a key feature in CSS; it relies on the ancestor-descendant relationship to operate.

Inheritance is the mechanism by which properties are applied not only to a specified element, but also to its descendants. Descendant elements may inherit CSS property values from any ancestor element enclosing them. In general, descendant elements inherit text-related properties, but their box-related properties are not inherited. Properties that can be inherited are color, font, letter-spacing, line-height, list-style, text-align, text-indent, text-transform, visibility, white-space and word-spacing.

Properties that cannot be inherited are background, border, display, float and clear, height, and width, margin, min- and max-height and -width, outline, overflow, padding, position, text-decoration, vertical-align and z-index. Inheritance can be used to avoid declaring certain properties over and over again in a style sheet, allowing for shorter CSS. Inheritance in CSS is not the same as inheritance in class-based programming languages , where it is possible to define class B as "like class A, but with modifications".

However, it is not possible to define a CSS class B like that, which could then be used to style multiple elements without having to repeat the modifications. If no color is assigned to the em element, the emphasized word "illustrate" inherits the color of the parent element, p.

The style sheet p has the color pink, hence, the em element is likewise pink:. One common way to format CSS for readability is to indent each property and give it its own line. In addition to formatting CSS for readability, shorthand properties can be used to write out the code faster, which also gets processed more quickly when being rendered: [19].

There are five possible values of the position property. If an item is positioned in any way other than static , then the further properties top , bottom , left , and right are used to specify offsets and positions.

The element having position static is not affected by the top , bottom , left or right properties. The float property may have one of three values. Absolutely positioned or fixed items cannot be floated. Other elements normally flow around floated items, unless they are prevented from doing so by their clear property.

CSS, on the other hand, let a document's style be influenced by multiple style sheets by way of "cascading" styles. As HTML grew, it came to encompass a wider variety of stylistic capabilities to meet the demands of web developers. This evolution gave the designer more control over site appearance, at the cost of more complex HTML. Variations in web browser implementations, such as ViolaWWW and WorldWideWeb , [27] made consistent site appearance difficult, and users had less control over how web content was displayed.

The style sheets could therefore not be linked to documents on the web. Improving web presentation capabilities was a topic of interest to many in the web community and nine different style sheet languages were proposed on the www-style mailing list.

It organized a workshop toward that end chaired by Steven Pemberton. Lie and Bos were the primary technical staff on this aspect of the project, with additional members, including Thomas Reardon of Microsoft, participating as well. It was published as a W3C Recommendation on May 12, CSS level 3, which was started in , is still under development as of This meant that already published standards like CSS 2.

The CSS 1 specification was completed in Microsoft's Internet Explorer 3 [23] was released in that year, featuring some limited support for CSS. IE 4 and Netscape 4. It was more than three years before any web browser achieved near-full implementation of the specification. Internet Explorer 5. Other browsers followed soon afterward, and many of them additionally implemented parts of CSS 2. However, even when later "version 5" web browsers began to offer a fairly full implementation of CSS, they were still incorrect in certain areas and were fraught with inconsistencies, bugs and other quirks.

Microsoft Internet Explorer 5.

How to change background image opacity using CSS

Instead of using a color, you can use an image as background to an element, by specifying the image location URL:. The default value is border-box , which extends up to the border outer edge. When using an image as background you will want to set the position of the image placement using the background-position property: left , right , center are all valid values for the X axis, and top , bottom for the Y axis:. If the image is smaller than the background, you need to set the behavior using background-repeat.

CSS background-position Property

Tailwind lets you conditionally apply utility classes in different states using variant modifiers. For example, use hover:bg-gradient-to-r to only apply the bg-gradient-to-r utility on hover. You can also use variant modifiers to target media queries like responsive breakpoints, dark mode, prefers-reduced-motion, and more. For example, use md:bg-gradient-to-r to apply the bg-gradient-to-r utility at only medium screen sizes and above. To learn more, check out the documentation on Responsive Design , Dark Mode and other media query modifiers. By default, Tailwind includes background image utilities for creating linear gradient backgrounds in eight directions. You can add your own background images by editing the theme. Learn more about customizing the default theme in the theme customization documentation. Learn more about arbitrary value support in the arbitrary values documentation. Tailwind CSS home page v3.

How to Implement a Background Image in HTML

Jakob Jenkov Last update: Here is an example:. The URL of the image to be displayed as background image is referenced inside the url '' declaration. Here is how a div element would look when rendered with the above background-image CSS property value applied I have added a dotted border to show you the boundaries of the div element :. As you can see, the text inside the div element is written on top of the background image.

Creating Image Overlays with CSS Multiple Backgrounds

CSS is designed to enable the separation of presentation and content, including layout , colors , and fonts. Separation of formatting and content also makes it feasible to present the same markup page in different styles for different rendering methods, such as on-screen, in print, by voice via speech-based browser or screen reader , and on Braille-based tactile devices. CSS also has rules for alternate formatting if the content is accessed on a mobile device. The name cascading comes from the specified priority scheme to determine which style rule applies if more than one rule matches a particular element. This cascading priority scheme is predictable.

The Best Looking CSS Animated Background Examples

The background-position CSS property sets the initial position for each background image. The position is relative to the position layer set by background-origin. It can be defined using one to four values. If two non-keyword values are used, the first value represents the horizontal position and the second represents the vertical position. If only one value is specified, the second value is assumed to be center. If three or four values are used, the length-percentage values are offsets for the preceding keyword value s. The second and fourth values are offsets for the preceding X and Y keyword values:.

CSS Code to Add Image Which Covers Half of Page Background

CSS3 offers the ability to include multiple background images for a given element - use a comma-delimited list to specify as many as you like:. In the example above, background image img1. Excess position or repeat values are ignored; that is, for an element for which three background images are specified and for which, say, four background-position values are set, the fourth set of position values would be ignored. If too few position or repeat values i.

And then you set the following CSS rule for the bg-doge class the image used for this example is downloaded from Unsplash :. This is because the opacity property applies to everything inside the container element. The pseudo selector :before above is used to create the background image. The absolute position and the top, left, bottom, right values are applied so that the pseudo-element has the same size as its parent. The z-index of the pseudo-element is set to -1 to position it at the bottom of the order.

The changes brought by the various CSS3 modules are pretty exciting for designers and front-end developers. Decreases in bandwidth and HTTP requests, faster maintenance and using real fonts instead of images are all big pluses on the SEO and accessibility fronts. But one area that seems a bit neglected is the new background properties. Oh sure, gradients are all the rage — and rightly so — but there are some super-handy bits you may not have investigated thoroughly. Maybe they seem more utilitarian and don't have the swagger of box-shadow and border-radius, but in this tutorial I intend to change your mind.

The CSS background-position property defines the initial position of the background-image for an element. It defines the vertical position of the background-image. It can be one of the following:. We will discuss the background-position property below, exploring examples of how to use this property in CSS.