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CSS background image positioning exercise (ii): Percentage of background-position

Source: Internet
Author: User
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Background-position:x y;

The percent positioning is not intuitively visible and needs to be calculated.

Background-position percent Calculation formula:

(Container width-width of background image) *x%=xpx
(Container height-height of background image) *y%=ypx

The pictures we used in the previous section can also continue to do exercises:

<!DOCTYPE HTML><HTMLLang= "en"><Head>    <MetaCharSet= "UTF-8">    <title>Background positioning exercises</title>    </Head><Body><stylerel= "stylesheet"type= "Text/css">. Box1,. Box2,. Box3,. Box4,.box5,. box6,. box7,. box8,.box9{float: Left;width:100px;Height:100px;background:#666 URL (18.png) no-repeat;Margin-left:10px;}/*(100px-400px) *x%=-300px; then x=100 (100px-400px) *y%=0; then y=0*/. Box1{background-position:100% 0%}/*(100px-400px) *x%=-200px; then x=66.6666 (100px-400px) *y%=0; then y=0*/. Box2{background-position:66.6666% 0%}/*(100px-400px) *x%=-100px; then x=33.3333 (100px-400px) *y%=0; then y=0*/. Box3{background-position:33.3333% 0%}/*(100px-400px) *x%=0px; then x=0 (100px-400px) *y%=0px; then y=0*/. Box4{background-position:0% 0%}/*(100px-400px) *x%=0px; then x=0 (100px-400px) *y%=-100px; then y=33.3333*/. Box5{background-position:0% 33.3333%}/*(100px-400px) *x%=0px; then x=0 (100px-400px) *y%=-200px; then y=66.66*/. box6{background-position:0% 66.6666%}/*(100px-400px) *x%=0px; then x=0 (100px-400px) *y%=-300px; then y=100*/. box7{background-position:0% 100%}/*(100px-400px) *x%=-300px; then x=100 (100px-400px) *y%=-200px; then y=100*/. Box8{background-position:100% 66.6666%}/*(100px-400px) *x%=-300px; then x=100 (100px-400px) *y%=-300px; then y=100*/. Box9{background-position:100% 100%}    </style>    <Divclass= "Box1"></Div>    <Divclass= "Box2"></Div>    <Divclass= "Box3"></Div>    <Divclass= "Box4"></Div>    <Divclass= "Box5"></Div>    <Divclass= "Box6"></Div>    <Divclass= "BOX7"></Div>    <Divclass= "Box8"></Div>    <Divclass= "Box9"></Div></Body></HTML>

Preview Effect:

It is therefore not difficult to draw the equivalent notation of background-position:

Left Top,top left, 0 0 equivalent to 0% 0%

Center Center is equivalent to 50% 50%

Bottom Right,right bottom equivalent to 100% 100%

Center Right,right Center is equivalent to 100% 50%

Bottom center, center bottom equivalent to 50% 100%

Left Center,center left equivalent to 0% 50%

Bottom Left,left bottom equivalent to 0% 100%

......

CSS background image positioning exercise (ii): Percentage of background-position

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Related Keywords:
parallax css background image scroll background image css background image scroll css css background image scroll slower how to scroll background image in css how to find background image of website css image position

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