1.背景圖如何才能完美適配視口
讓背景圖適配視口很容易,需要使用下面 CSS 即可:
body {
background-image: url('https://images.unsplash.com/photo-1573480813647-552e9b7b5394?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2253&q=80');
background-repeat: no-repeat;
background-position: center;
background-attachment: fixed;
background-size: cover;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
}
事例源碼:https://codepen.io/duomly/pen...點擊預覽
2.如何在CSS中使用多個背景圖片?
如果我想在背景中添加一張以上的圖片怎麼辦?CSS3 中可以直接 指定多個背景路徑,如下所示:
body {
background-image: url(https://image.flaticon.com/icons/svg/748/748122.svg), url(https://images.unsplash.com/photo-1478719059408-592965723cbc?ixlib=rb-1.2.1&auto=format&fit=crop&w=2212&q=80);
background-position: center, top;
background-repeat: repeat, no-repeat;
background-size: contain, cover;
}
事例源碼:https://codepen.io/duomly/pen...點擊預覽
3.如何創建一個三角形的背景圖像
另一個很酷的背景特效就是三角形背景,當我們想展示某些完全不同的選擇(例如白天和黑夜或冬天和夏天)時,這種特效就更加棒。
思路是這樣的,首先創建兩個div
,然後將兩個背景都添加到其中,然後,第二個div
使用clip-path
屬性畫出三角形。
html
<body>
<div class="day"></div>
<div class="night"></div>
</body>
css
body {
margin: 0;
padding: 0;
}
div {
position: absolute;
height: 100vh;
width: 100vw;
}
.day {
background-image: url("https://images.unsplash.com/photo-1477959858617-67f85cf4f1df?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2613&q=80");
background-size: cover;
background-repeat: no-repeat;
}
.night {
background-image: url("https://images.unsplash.com/photo-1493540447904-49763eecf55f?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2250&q=80");
background-size: cover;
background-repeat: no-repeat;
clip-path: polygon(100vw 0, 0% 0vh, 100vw 100vh);
}
源碼:https://codepen.io/duomly/pen...點擊預覽
4.如何在背景圖像上添加疊加漸變?
有時我們想在背景上添加一些文字,但有的圖片太亮,導致字看不清楚,所以這裏我們就需要讓背景圖疊加一些暗樂來突出文字效果。
例如,可以通過添加粉紅橙色漸變或紅色至透明漸變來增強日落圖像,這些情況下使用疊加的漸變就很容易做到。
css
body {
background-image:
linear-gradient(4deg, rgba(38,8,31,0.75) 30%, rgba(213,49,127,0.3) 45%, rgba(232,120,12,0.3) 100%),
url("https://images.unsplash.com/photo-1503803548695-c2a7b4a5b875?ixlib=rb-1.2.1&auto=format&fit=crop&w=2250&q=80");
background-size: cover;
background-repeat: no-repeat;
background-attachment: fixed;
background-position: center
}
源碼:https://codepen.io/duomly/pen...點擊預覽
5.如何創建一個顏色動態變化的背景
如果你很多顏色,你想確認哪種顏色更適合背景圖片的顏色,剛動態更改背景顏色的技巧就很有用。
css
HTML CSSResult
EDIT ON
@keyframes background-overlay-animation {
0% {
background-image:
linear-gradient(4deg, rgba(255,78,36,0.3) 50%, rgba(255,78,36,0.3) 100%), url("https://images.unsplash.com/photo-1559310589-2673bfe16970?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2250&q=80");
}
25% {
background-image:
linear-gradient(4deg, rgba(213,49,127,0.3) 50%, rgba(213,49,127,0.3) 100%), url("https://images.unsplash.com/photo-1559310589-2673bfe16970?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2250&q=80");
}
50% {
background-image:
linear-gradient(4deg, rgba(36,182,255,0.3) 50%, rgba(36,182,255,1) 100%),
url("https://images.unsplash.com/photo-1559310589-2673bfe16970?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2250&q=80");
}
100% {
background-image:
linear-gradient(4deg, rgba(0,255,254,0.3) 50%, rgba(0,255,254,0.3) 100%),
url("https://images.unsplash.com/photo-1559310589-2673bfe16970?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2250&q=80");
}
}
@-webkit-keyframes background-overlay-animation {
0% {
background-image:
linear-gradient(4deg, rgba(255,78,36,0.3) 50%, rgba(255,78,36,0.3) 100%)
url("https://images.unsplash.com/photo-1559310589-2673bfe16970?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2250&q=80");
}
25% {
background-image:
linear-gradient(4deg, rgba(213,49,127,0.3) 50%, rgba(213,49,127,0.3) 100%),
url("https://images.unsplash.com/photo-1559310589-2673bfe16970?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2250&q=80");
}
50% {
background-image:
linear-gradient(4deg, rgba(36,182,255,0.3) 50%, rgba(36,182,255,1) 100%),
url("https://images.unsplash.com/photo-1559310589-2673bfe16970?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2250&q=80");
}
100% {
background-image:
linear-gradient(4deg, rgba(0,255,254,0.3) 50%, rgba(0,255,254,0.3) 100%),
源碼:https://codepen.io/duomly/pen...點擊預覽
大家都說簡歷沒項目寫,我就幫大家找了一個項目,還附贈【搭建教程】。
6. 如何製作網格背景圖像?
有時候會遇到一些需要有藝術或者攝影類的項目,他們一般要求網站要有藝術信息,要有創意。網絡的背景就挺有創意的,效果如下:
HTML
<body>
<div class="container">
<div class="item_img"></div>
<div class="item"></div>
<div class="item_img"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item_img"></div>
<div class="item"></div>
<div class="item_img"></div>
<div class="item"></div>
<div class="item"></div>
<div class="item_img"></div>
<div class="item"></div>
<div class="item_img"></div>
<div class="item"></div>
<div class="item_img"></div>
<div class="item"></div>
</div>
</body>
scss
body {
margin: 0;
padding: 0;
}
.container {
position: absolute;
width: 100%;
height: 100%;
background: black;
display: grid;
grid-template-columns: 25fr 30fr 40fr 15fr;
grid-template-rows: 20fr 45fr 5fr 30fr;
grid-gap: 20px;
.item_img {
background-image: url('https://images.unsplash.com/photo-1499856871958-5b9627545d1a?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2207&q=80');
background-repeat: no-repeat;
background-position: center;
background-attachment: fixed;
background-size: cover;
}
}
源碼:https://codepen.io/duomly/pen...點擊預覽
7.如何將背景圖像設置爲文本顏色?
使用background-image
與 background-clip
,可以實現背景圖像對文字的優美效果。 在某些情況下,它可能非常有用,尤其是當我們想創建一個較大的文本標題而又不如普通顏色那麼枯燥的情況。
HTML
<body>
<h1>Hello world!</h1>
</body>
SCSS
body {
display: flex;
align-items: center;
justify-content: center;
flex-direction: column;
width: 100%;
text-align: center;
min-height: 100vh;
font-size: 120px;
font-family:Arial, Helvetica, sans-serif;
}
h1 {
background-image: url("https://images.unsplash.com/photo-1462275646964-a0e3386b89fa?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2600&q=80");
background-clip: text;
-webkit-background-clip: text;
color: transparent;
}