HTML and CSS Reference
In-Depth Information
d.
Next you'll examine all of the attribute nodes for the element specified by
the
elemNode
parameter. Create a
for
loop to go through the nodes in the
attributes
collection for the
elemNode
parameter. Each time through the loop
increase the value of the
nodeCount
and
attCount
variables by 1. Also add the
following text string to the value of the
elemText
variable
att
='
value
'
where
att
is the node name of the attribute node and
value
is the node value of
the attribute node.
e. After the
for
loop completes, append the text string
>
to the value of the
elemText
variable.
f. Create a new text node named
elemtextnode
containing the text of the
elemText
variable.
g. Append
elemTextNode
to
spanElem
; append
spanElem
to
liElem
; and finally,
append
liElem
to
nestedList
.
7. Create the
writetextli()
function. The purpose of this function is to create a single
list item for the node tree diagram based on the contents of a text node. The structure
of the list item will be one of the two structures shown in Figure 14-69.
Figure 14-69
list item displaying information about a text node
LI
LI
“
+--
”
“
+--
”
SPAN
SPAN
class=
“
wsLI
“
class=
“
textLI
“
#text
text node value
The function has two parameters:
textnode
, which represents the text node from the
source document on which the list item is based, and
nestedlist
, which represents the
nested list that the list item will be appended to. Add the following commands to the
function:
a. Create the
lielem
variable for a list item element node containing the text
string
+--
.
b. Create the
spanelem
variable for a
span
element node.
c. Store the node value of the
textNode
parameter in the variable
textstring
.
d. Jorge has provided a function named isWhiteSpaceNode() to determine whether
a text node represents white space or not. Call the isWhiteSpaceNode() function
using
textstring
as the parameter value.
e. If the isWhiteSpaceNode() function returns the value
true
, then: i) increase the
value of the
wsCount
variable by 1; ii) set the class name of
spanElem
to
wsli
;
and iii) set the inner HTML of
spanElem
to the text string
#text
.
f. If the isWhiteSpaceNode() function returns the value
false
, then: i) set the class
name of
spanElem
to
textli
; and ii) set the inner HTML of
spanElem
to the value
of the
nodevalue
property for the
textNode
parameter.
g. Append the
spanElem
node to the
liElem
node, and then append the
liElem
node
to the
nestedList
parameter.
8. Create the
maketree()
function. The purpose of this function is to recursively gener-
ate all of the nested lists contained in the node tree diagram. The function has two
