Best Way to Implement Background Image on HTML or Body

Best way to implement background image on HTML or body

body{
    background-image:url('../images/background.jpg');
    background-attachment:fixed;
    background-repeat: no-repeat;
    background-size: cover;
}

This would be the best way, you could apply it to the HTML, it really depends on what you prefer...

background-image:url('../images/background.jpg');

Assuming your css file is in a different map, you do ../ to go to the map in which your css folder is placed, then you go into the images file and select the image.

background-attachment:fixed;

When setting a background-image I personally like to use this, it makes it so that when a user scrolls, the background-image maintains it's current position.

background-repeat: no-repeat;

When using this setting, it makes it so that the image won't repeat, in case it is too small or just won't cover the whole background.

background-size: cover;

When you apply this you will set the background-size to cover, combined with no-repeat and attachment: fixed it makes for a good way to style your background image

How to add Background Image in CSS and HTML

Try using the background-image tag. Use min-height: 100%; to make the image fit the entire page.

<h1>Title</h1>

<style>
h1 {
color: #FFFFFF
}

body {
min-height: 100%;
background-image: url(/*The link goes here*/);
}

</style>

CSS property background-image work for body and not for class

The default value of the height property is auto for all elements. Since there is no element present in the div element so the height of the div element is 0 in your case, so the image is not fit in the div element.

You can set the height of the div element to auto or any pixel value(if the value exceeds it will overflow ).

height: auto; or height: 20px:

@Edited:

According to the official docs, The background of the root element becomes the canvas background and its background painting area extends to cover the entire canvas.

The HTML element is the root element. Now, according to your case, you have set the background image to body element and not in HTML element. Thanks to background propagation it will check the background for the root element first and if it is not there then it will propagate to body element background. As you have set the background image to body so the background image will apply to whole canvas.

Tip: Canvas size is infinite but user agent set its size to the target device.

Applying a background to html and/or body

This is correct behavior.¹ In standards mode, body, as well as html, doesn't immediately take up the entire height of the viewport, even though it appears so when you only apply a background to the latter. In fact, the html element will take on the background of body if you don't give it its own background, and html will pass this on to the canvas:

The background of the root element becomes the background of the canvas and its background painting area extends to cover the entire canvas, although any images are sized and positioned relative to the root element as if they were painted for that element alone. (In other words, the background positioning area is determined as for the root element.) If the root's ‘background-color’ value is ‘transparent’, the canvas's background color is UA dependent. The root element does not paint this background again, i.e., the used value of its background is transparent.

For documents whose root element is an HTML HTML element or an XHTML html element: if the computed value of ‘background-image’ on the root element is ‘none’ and its ‘background-color’ is ‘transparent’, user agents must instead propagate the computed values of the background properties from that element's first HTML BODY or XHTML body child element. The used values of that BODY element's background properties are their initial values, and the propagated values are treated as if they were specified on the root element. It is recommended that authors of HTML documents specify the canvas background for the BODY element rather than the HTML element.

That said, however, you can superimpose any background image over a background color on a single element (either html or body), without having to rely on two elements — simply use background-color and background-image or combine them in the background shorthand property:

body {
    background: #ddd url(background.png) center top no-repeat;
}

If you wish to combine two background images, you need to rely on multiple backgrounds. There are chiefly two days to do this:

In CSS2, this is where styling both elements comes in handy: simply set a background image to html and another image to body which you wish to superimpose over the first. To ensure the background image on body displays at full viewport height, you need to apply height and min-height respectively as well:
```
html {
    height: 100%;
    background: #ddd url(background1.png) repeat;
}

body {
    min-height: 100%;
    background: transparent url(background2.png) center top no-repeat;
}
```
Incidentally, the reason why you have to specify height and min-height to html and body respectively is because neither element has any intrinsic height. Both are height: auto by default. It is the viewport that has 100% height, so height: 100% is taken from the viewport, then applied to body as a minimum to allow for scrolling of content.
In CSS3, the syntax has been extended so you can declare multiple background values in a single property, eliminating the need to apply backgrounds to multiple elements (or adjust height/min-height):
```
body {
    background: url(background2.png) center top no-repeat, 
                #ddd url(background1.png) repeat;
}
```
The only caveat is that in a single multi-layered background, only the bottommost layer may have a background color. You can see in this example that the transparent value is missing from the upper layer.
And don't worry — the behavior specified above with propagating background values works exactly the same even if you use multi-layered backgrounds.

If you need to support older browsers, though, you'll need to go with the CSS2 method, which is supported all the way back to IE7.

My comments under this other answer explain, with an accompanying fiddle, how body is actually offset from html by default margins even though it looks like it's being padded out instead, again owing to this seemingly strange phenomenon.

¹ _{This may have its roots in setting the HTML background and bgcolor attributes of body causing the background attribute to apply to the entire viewport. More on that here.}

Background-image in body?

<body style="background-image: url(#);">

When to use IMG vs. CSS background-image?

Proper uses of IMG

Use IMG if you intend to have
people print your page and you want the image to be included by default.
—JayTee
Use IMG (with alt text) when the image has an important semantic meaning, such as a warning icon. This ensures that the meaning of the image can be communicated in all user-agents, including screen readers.

Pragmatic uses of IMG

Use IMG plus alt attribute if the image
is part of the content such as a logo or diagram or person (real person, not stock photo people).
—sanchothefat
Use IMG if you rely on browser scaling to render an image in proportion to text size.
Use IMG
for multiple overlay images in IE6.
Use IMG with a z-index in order
to stretch a background image to fill its entire window.
Note, this is no longer true with CSS3 background-size; see #6 below.
Using img instead of background-image can dramatically improve performance of animations over a background.

When to use CSS background-image

Use CSS background images if the
image is not part of the content.
—sanchothefat
Use CSS background images when
doing image-replacement of text eg. paragraphs/headers.
—sanchothefat
Use background-image if you intend to have
people print your page and you do not want the image to be included by default.
—JayTee
Use background-image if you need to improve download times, as
with CSS sprites.
Use background-image if you need for only a portion of the image to be visible, as with CSS sprites.
Use background-image with background-size:cover in order to stretch a background image to fill its entire window.

Best Way to Implement Background Image on HTML or Body