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  • 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  • in HTML5, the align attribute is obsolete and instead we will use a stylesheet.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.

The HTML image tag is normally an inline element, but sometimes we want to float text around

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HTML教程。圍繞著圖片的文字流 - lynda.com (HTML tutorial: Flowing text around an image | lynda.com)

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    Pan-Shy Gang 發佈於 2021 年 01 月 14 日
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