basic terms in css

1. Document flow: The default arrangement of page elements, arranged in sequence according to the order of the elements in the html document, from left to right, top to bottom;

2. Block element: occupies one line by default , arranged in the vertical direction, the width and height can be set, for example:dc6dce4a544fdca2df29d5ac0ea9906b,e388a4556c0f65e1904146cc1a846bee,c1a436a314ed609750bd7c7d319db4daff9c23ada1bcecdd1a0fb5d5a0f18437...;

3. Inline elements: Default is in one line Arranged in the horizontal direction, the width and height are determined by the content and cannot be set. For example, 45a2772a6b6107b401db3c9b82c049c23499910bf9dac5ae3c52d5ede7383485907fae80ddef53131f3292ee4f81644b...;

4. Replace elements: The content of the element is determined by the label. attribute to set, the label is actually a placeholder, for example f8d9cde947de1719581060b617c87f2114b862228af3b93cec3de977706136b3

5. Non-replacement element: The element content contains the current In tags, such ase388a4556c0f65e1904146cc1a846bee,4a249f0d628e2318394fd9b75b4636b1,2cdf5bf648cf2f33323966d7f58a7f3f

6. How to distinguish replacement and non-replacement elements?

6-1. Replacement elements are because of the element content It comes from external resources, so most of them only need one tag, because there are many single tags, but there are exceptions, such as:

39000f942b2545a5315c57fa3276f2203f1c4e4b6b16bbbd69b2ee476dc4f83a39000f942b2545a5315c57fa3276f220... Most of these tags have src, indicates the resource path to be imported. If there is content in the tag, it is either invalid,

or it is just the introduction of a resource.

6-2. Non-replacement elements, whose content is directly written by the user in the tag, such as e388a4556c0f65e1904146cc1a846bee, 684271ed9684bde649abda8831d4d355 and other text tags, are the most common non-replacement elements

    
    




div标签是最简单最常用的块标签

div标签是最简单最常用的块标签

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