1. The difference between inline elements and block-level elements
1. Inline elements will not occupy the entire line and are arranged in a straight line. They are all on the same line, arranged horizontally;
Block-level elements will occupy one line, arranged vertically.
2. Block-level elements can contain inline elements and block-level elements; inline elements cannot contain block-level elements.
3. The difference between the attributes of inline elements and block-level elements is mainly due to the box model attributes. The width setting of inline elements is invalid, the height is invalid (line-height can be set), and the margin up and down is invalid. , padding up and down is invalid.
2. Conversion of inline elements and block-level elements
Conversion of inline elements For block elements: display:block;
Block elements are converted into inline elements ： display:inline;
##3. Question extension
Question description: Why can the width and height of inline elements such as img and input be set?
Detailed answer:
Elements are the basis of the document structure. In CSS, each element generates a box (box, also translated as "box") that contains the content of the element. But different elements will be displayed differently. For example, and are different, and and are also different. Different types are specified for different elements in the document type definition (DTD), which is one of the reasons why DTD is important to documents. 1. Replaceable and non-replaceable elements tag, but if you view the (X)HTML code, you cannot see the actual content of the image; another example Determine whether to display an input box, radio button, etc. based on the type attribute of the tag. (X)
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