Question

如何使用css / html实现以下水印文本（“howbloggerz”）？

Answer 1

这与Daerik的答案非常相似，但我想避免使用额外的元素，并自动生成水印文本。

＆＃13;

Array.from(document.querySelectorAll('.watermarked')).forEach(function(el) {
  el.dataset.watermark = (el.dataset.watermark + ' ').repeat(300);
});

＆＃13;

.watermarked {
  position: relative;
  overflow: hidden;
}

.watermarked img {
  width: 100%;
}

.watermarked::before {
  position: absolute;
  top: -75%;
  left: -75%;
  
  display: block;
  width: 150%;
  height: 150%;
  
  transform: rotate(-45deg);
  content: attr(data-watermark);
  
  opacity: 0.7;
  line-height: 3em;
  letter-spacing: 2px;
  color: #fff;
}

＆＃13;

<div class="watermarked" data-watermark="howbloggerz">
  <img src="http://www.w3schools.com/css/img_fjords.jpg">
</div>

＆＃13;

Answer 2

设置容器的大小，并使用绝对定位浮动文本，同时旋转transforming文本。

#watermark {
  height: 450px;
  width: 600px;
  position: relative;
  overflow: hidden;
}
#watermark img {
  max-width: 100%;
}
#watermark p {
  position: absolute;
  top: 0;
  left: 0;
  color: #fff;
  font-size: 18px;
  pointer-events: none;
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
}

<div id="watermark">
  <img src="http://www.topchinatravel.com/pic/city/dalian/attraction/people-square-1.jpg">
  <p>This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark. This is a watermark.</p>
</div>

注意：对于重复文字，我建议使用JavaScript或jQuery。

Answer 3

CSS:-
.watermarked::before {
    position: fixed;
    top: -75%;
    left: -75%;

    display: block;
    width: 300%;
    height: 300%;

    transform: rotate(-45deg);
    content: attr(data-watermark);

    font-size: 30px;
    opacity: 0.15;
    line-height: 4em;
    letter-spacing: 2px;
    color: #ff0523;
    z-index:-1;
}

HTML:-
<div class="watermarked" data-watermark="Watermark.."></div>

SCRIPT:-

<script>        
Array.from(document.querySelectorAll('.watermarked')).forEach(function(el) {
        el.dataset.watermark = (el.dataset.watermark + ' ').repeat(10000);
    });
</script>

水印位置应固定并显示＆amp;高度应该是你的屏幕尺寸。然后水印将打印在你的整个报告或其他什么。

Answer 4

我现在正在使用svg作为背景图像。普通CSS：

body {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' version='1.1' height='100px' width='100px'><text transform='translate(20, 100) rotate(-45)' fill='rgb(245,45,45)' font-size='20'>watermark</text></svg>");
}

<body style="width:100%;height:100%"></body>

设置背景的Javascript：

function watermark(text) {
  var body = document.getElementsByTagName('body')[0];
  var bg = "url(\"data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' version='1.1' height='100px' width='100px'>" +
    "<text transform='translate(20, 100) rotate(-45)' fill='rgb(245,45,45)' font-size='20' >" + text + "</text></svg>\")";
  body.style.backgroundImage = bg
}

//for this test
var input = document.getElementById('a');
watermark(input.value);
input.addEventListener('input', function(evt) {
  watermark(this.value);
});

<body style="width:100%;height:100%">
  <input id="a" value="change me" />
</body>

Answer 5

如果仅是在图像上放置文本，则这是另一个可能的css选项，它带有drop-shadow和一个伪（text-shadow也适用）

.watermarked:after {/* draw the watermark at screen*/
  color: rgba(0, 0, 0, 0.4);
  content: 'watermarked watermarked watermarked';
  word-spacing: 3em;
  transform: rotate(-60deg);
  filter: 
  drop-shadow(2em 3em  #000) 
  drop-shadow(4em 6em  #000) 
  drop-shadow(8em 12em #000) 
  drop-shadow(-15em -24em #000)
  ;
}

/* makeup */
.watermarked {
  width: max-content;
  border: solid;
  display: grid;
  overflow: hidden;
}

img,
.watermarked:after {
  grid-row: 1;
  grid-column: 1;
  margin: auto;
}

<div class="watermarked" data-watermark="howbloggerz">
  <img src="http://www.w3schools.com/css/img_fjords.jpg">
</div>

Answer 6

     Array.from(document.querySelectorAll('.watermarked')).forEach(function(el) {
        el.dataset.watermark = (el.dataset.watermark + ' ').repeat(300);
    });

.watermarked::before {
    position: fixed;
    top: -75%;
    left: -75%;

    display: block;
    width: 300%;
    height: 300%;

    transform: rotate(-45deg);
    content: attr(data-watermark);

    font-size: 30px;
    opacity: 0.75;
    line-height: 4em;
    letter-spacing: 2px;
    color: #cccccc;
}

<html>
<head>
<title>
Form and Watermarks
</title>
</head>
<body>

<h1>Form Demo</h1>
<form method="post">
    First Name: <input name="first" type="text" /><br>
    Last name: <input name="last" type="text" />
    <br />
    <input name="Submit" type="submit" value="submit" />
</form>

<div class='watermarked' data-watermark='watermark..' ></div>

</body>
</html>

效果很好，但不适用于 html 表单。表单元素被禁用。看看这个。

水印文本重复对角css / html

6 个答案: