字幕列表 影片播放 列印英文字幕 The HTML image tag is normally an inline element, but sometimes we want to float text around an image. Here is how this is done. Let's start by making a working copy of images.html and I am going to name this images-working.html and open it in my text editor. Here you see just a simple HTML file. It's got an image and it's got some paragraphs with some Lorem Ipsum in them, and if we open this in a browser, you will see that it looks like that. The image is standing by itself, but that's not because it's a block level element. It's not. It's an inline level element, but it just doesn't have any text around it. It's here separate from the text in the paragraph. So the paragraph actually begins after it which is why it displays the way that it does on the screen. Now if I want this text to flow around the image, there is a couple of different ways that I can do this. In old HTML4 and earlier this was done with an align attribute. I would say align="left" like that, and I could put this back on the line there if I like, but of course HTML ignores all of that whitespace that doesn't actually matter. And if I save this and reload in the browser, you'll see that now the text flows around the image. There is no margin between them. It's not very attractive, but this is how it used to be done and there are other attributes to put some space between them, and it was all a little bit cumbersome and didn't work very well. Now this still works and you're certainly allowed to do it this way. All the modern browsers support legacy code, but there is a correct way to do it, and technically in HTML5, the align attribute is obsolete and instead we will use a stylesheet. So I am just going to put a style right here in the HTML for this tag and I am going to say float: left, like that. When I save that and reload it in the browser, you see it accomplishes exactly the same thing. And if I like, I can say float: right, and reload, and now it floats off to the right. But because the paragraph is flushed left, I am going to leave it on the left so that we can see this ugly border right here, and we can see that that's not working very well. I am going to show you what we can do with this. Again using CSS, this becomes very easy. I can say margin-right: 10px and I can say margin-bottom: 5px, and when we load this up in the browser, we see now we have a nice little margin around the image. I can even put a little border around it. I can say border: solid black 1px, and give it a padding of 2 pixels so there is a little space between the border and the image, and when I reload it, now we have a rather attractive looking image with a nice little border around it and a good amount of margin around it as well. So you can easily do a lot of things to make this image look good. It's worth noting that any time you add a float, either with the align attribute or with the float property in CSS, that the image actually converts to being a block level element. So now it is block level. It is no longer inline. Of course this is a lot of stuff to type and if you are going to type this much, you are going to want to be able to reuse it, so I am going to go ahead and copy this and I am going to come up here and I am going to create a style, and I am going to call this style float-img. I am going to put a dot in front of it to make it a class and I'll take all that stuff that I copied and I am just going to--and now we have a nice class for this float image and I can come down here and I can take all of this and I can just say class="float-img" like that, and confirm that that's what I named it and save this and reload it in the browser, and you see that it looks exactly the same. Now if I want to, I can make it float right, and there it is, and if I want to, I can come down here and I can take all of this and I can copy it, and have another image, say this one will be paper, picture of paper, and I can say "Running with this is recommended", and we come over here and load it in the browser. Well notice it's not quite exactly right. We now have two of them and one of them is to the left of it and the wrapping around isn't right. That's because they're both floating right, and the way to fix this and we are going to talk about this a little bit more later, but we can say clear: right and then each one of these floats will start on a line by itself, and so now it's doing exactly what it is that we meant for it to do, and I can change this margin-right to margin-left so that that looks better, and now it's floating right and it's got a nice little margin next to it. So you can see that formatting images for display with CSS is easy and powerful. For more foregrounding options, see my CSS for Developers course here on the lynda.com online training library.
B1 中級 HTML教程。圍繞著圖片的文字流 - lynda.com (HTML tutorial: Flowing text around an image | lynda.com) 40 12 Pan-Shy Gang 發佈於 2021 年 01 月 14 日 更多分享 分享 收藏 回報 影片單字