如何在脚本中设置图像高度

问题描述 投票:1回答:3

我正在尝试创建一个横幅,在每次刷新时显示随机图像。我已经设法让它工作,但我需要将图像的高度更改为139px,而不是让它们以完整大小显示。如何在随机加载图像的脚本中设置图像的高度?

我15年前在学校学习了代码,所以我现在对它的理解基本上是0,所以我很容易迷失!可能有更好的方法来加载随机图像,但这是我唯一能够开始工作的方法。

<div style="position:absolute;top:0;left:1072;height:139px;overflow:hidden;" class="banner3"></div>

<script>
      var randomImage = {
        paths: [
          "c1.png",
          "c2.png",
          "c3.png",
		  "c4.png",
		  "c5.png",
		  "c6.png",
		  "c7.png",
        ],
        generate: function(){
          var path = randomImage.paths[Math.floor(Math.random()*randomImage.paths.length)];
          var img = new Image();
          img.src = path;
          $("div.banner3").html(img);

        }
      }
      randomImage.generate();
	 
</script>
css image tags resize
3个回答
0
投票

使用document.createElement而不是image,如下所示:

var randomImage = {
    paths: [
      "c1.png",
      "c2.png",
      "c3.png",
      "c4.png",
      "c5.png",
      "c6.png",
      "c7.png",
    ],
    generate: function(){
      var path = randomImage.paths[Math.floor(Math.random()*randomImage.paths.length)];
      var img = document.createElement('img');
      img.src = path;

      img.height = DESIRED HEIGHT

      $("div.banner3").html(img);

    }
  }
  randomImage.generate();

0
投票

你可以试试这个:

var path = randomImage.paths[Math.floor(Math.random()*randomImage.paths.length)];
var img = new Image();
img.src = path; 

在此之后你可以添加:

img.style.height = '139px';

然后将其设置为html:

$("div.banner3").html(img);

0
投票

你可以用CSS做到这一点:

var randomImage = {
  paths: [ "https://picsum.photos/id/1/300/300",
          "https://picsum.photos/id/2/300/300",
          "https://picsum.photos/id/3/300/300",
          "https://picsum.photos/id/4/300/300",
          "https://picsum.photos/id/5/300/300",
          "https://picsum.photos/id/6/300/300",
          "https://picsum.photos/id/7/300/300" ],
  generate: function(){
    var path = randomImage.paths[Math.floor(Math.random()*randomImage.paths.length)];
    var img = new Image();
    img.src = path;
    $("div.banner3").html(img);
  }
}

randomImage.generate();
.banner3 {
  position: absolute;
  top: 0;
  left: 0;
  height: 139px;
  overflow: hidden
}
.banner3 img {
  height: 139px
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="banner3"></div>
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