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Convert JavaScript offsetparent

Source: Internet
Author: User
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The element in TD treats the first absolute/relative location hierarchy parent as offsetparent. If it is not found, it should be discussed in three cases.

1. If the element is not absolutely/relative located, TD will be treated as offsetparent

2. If the element is absolute/relative located and the table is not absolute/relative located, the body is treated as offsetparent.

3. If the element is absolute/relative and the table is absolute/relative, the table is treated as offsetparent.

Let's take a look at the sample code.

1. <body>
<Table border = 1 align = right>
<Tr>
<TD id = ocell> <Div id = "parentdiv" style = "position: relative "> parentdiv <Div id =" Sondiv "> Sondiv </div> </TD>
</Tr>
</Table>

Running result parentdiv. offsetparent. tagname is "body"

Sondiv. offsetparent. ID is "parentdiv"

2. <body>
<Table border = 1 align = right>
<Tr>
<TD id = ocell> <Div id = "parentdiv" style = "position: relative"> parentdiv <Div id = "Sondiv" style = "position: relative "> Sondiv </div> </TD>
</Tr>
</Table>

Running result parentdiv. offsetparent. tagname is "body"

Sondiv. offsetparent. ID is "parentdiv"

3. <body>
<Table border = 1 align = right>
<Tr>
<TD id = ocell> <Div id = "parentdiv"> parentdiv <Div id = "Sondiv" style = "position: relative "> Sondiv </div> </TD>
</Tr>
</Table>

Running result parentdiv. offsetparent. tagname is "TD"

Sondiv. offsetparent. tagname is "body"

4. <body>
<Table border = 1 align = right>
<Tr>
<TD id = ocell> <Div id = "parentdiv"> parentdiv <Div id = "Sondiv"> Sondiv </div> </TD>
</Tr>
</Table>

Running result parentdiv. offsetparent. tagname is "TD"

Sondiv. offsetparent. tagname is "TD"

5. <body>
<Table border = 1 align = right style = "position: relative">
<Tr>
<TD id = ocell> <Div id = "parentdiv" style = "position: relative"> parentdiv <Div id = "Sondiv" style = "position: relative "> Sondiv </div> </TD>
</Tr>
</Table>

Running result parentdiv. offsetparent. tagname is "table"

Sondiv. offsetparent. tagname is "parentdiv"

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