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Introduction to the related attributes of iframe, frame and frameset in html framework_html/css_WEB-ITnose
Introduction to the related attributes of iframe, frame and frameset in html framework_html/css_WEB-ITnose
Questions
1. Do you know the difference between iframe and frame?
2. Have you used frameset and other related attributes?
The difference between iframe and frame
I don’t know if you have used the frameset attribute in your project. The frameset attribute was used by me in the production of an online customer service system last year, because the customer service system requires There is a fixed layout, one on top, one on the bottom, etc. At that time, frameset and frame were used. After I used these attributes, I understood the difference between iframe and frame. Because before this, I generally didn’t use frames in my projects, and if I did, I would use iframes.
Let’s talk about the specific differences! The following points are summarized.
1. Frame cannot be used independently of frameSet, iframe can;
2. Frame cannot be placed in body;
The following can be displayed normally:
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The following cannot be displayed normally:
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On the contrary, if the iframe is placed under the frameSet attribute, it must be placed in the body
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3. iframe is an html tag and can be used anywhere in html, but frame cannot.
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The frame must be nested in the frameSet and cannot be used in tags such as table.
4. The height of the frame can only be controlled through frameSet; iframe can be controlled by itself and cannot be controlled through frameSet
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5. If in the same If the page uses more than two iframes, it can be displayed normally in IE, but only the first one can be displayed in Firefox; if more than two frames are used, it can be displayed normally in both IE and Firefox
Introduction to frameset related attributes
border Set the border thickness of the frame.
bordercolor Set the border color of the frame.
frameborder Set whether to display the frame border. The setting values are only 0 and 1; 0 means no border, 1 means to display the border.
cols
Split the page vertically. There are three numerical expression methods: "30%, 30 (or 30px),"; the number of values represents the number of divided windows and the values are separated by ",". "30%" means that the frame area occupies 30% of the entire browser page area; "30" means that the horizontal width of the area is 30 pixels; "" means that the area occupies the remaining page space. For example: cols="25%,200,*" means to divide the page into three parts, the left part accounts for 25% of the page, the middle horizontal width is 200 pixels, and the rest of the page is the right part.
rows Split the page horizontally. The numerical representation method and meaning are the same as cols.
framespacing Sets the reserved space distance between frames.
Usage
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The layout and the renderings of each part of the js selection are as follows:
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