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utils201708.js
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utils201708.js
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//->utils：common method libraries used in projects
var
utils
=
(
function
(
)
{
var
isHighVersion
=
'getComputedStyle'
in
window
;
//->toArray：converts a like array into an array
function
toArray
(
likeAry
)
{
var
ary
=
[
]
;
if
(
isHighVersion
)
{
ary
=
[
]
.
slice
.
call
(
likeAry
)
;
}
else
{
for
(
var
i
=
0
;
i
<
likeAry
.
length
;
i
++
)
{
ary
[
ary
.
length
]
=
likeAry
[
i
]
;
}
}
return
ary
;
}
//->toJSON：converts a string to a JSON object
function
toJSON
(
str
)
{
return
'JSON'
in
window
?
JSON
.
parse
(
str
)
:
eval
(
'('
+
str
+
')'
)
;
}
//->getCss：gets the style property value of the element
function
getCss
(
curEle
,
attr
)
{
var
val
=
null
;
if
(
isHighVersion
)
{
val
=
window
.
getComputedStyle
(
curEle
,
null
)
[
attr
]
;
}
else
{
if
(
attr
.
toLowerCase
(
)
===
'opacity'
)
{
val
=
curEle
.
currentStyle
[
'filter'
]
;
reg
=
/
^
a
l
p
h
a
\(
o
p
a
c
i
t
y
=
(
.
+
)
\)
$
/
i
;
val
=
reg
.
test
(
val
)
?
reg
.
exec
(
val
)
[
1
]
/
100
:
1
;
}
else
{
val
=
curEle
.
currentStyle
[
attr
]
;
}
}
var
temp
=
parseFloat
(
val
)
;
val
=
isNaN
(
temp
)
?
val
:
temp
;
return
val
;
}
//->setCss：sets the style property value of an element
function
setCss
(
curEle
,
attr
,
value
)
{
if
(
attr
.
toLowerCase
(
)
===
'opacity'
)
{
curEle
.
style
.
opacity
=
value
;
curEle
.
style
.
filter
=
'alpha(opacity='
+
(
value
*
100
)
+
')'
;
return
;
}
var
unitReg
=
/
^
(
z
I
n
d
e
x
|
f
o
n
t
W
e
i
g
h
t
)
$
/
i
;
if
(
!
isNaN
(
value
)
&&
!
unitReg
.
test
(
attr
)
)
{
value
+=
'px'
;
}
curEle
[
'style'
]
[
attr
]
=
value
;
}
//->setGroupCss：sets the style attribute values of elements in batch settings
function
setGroupCss
(
curEle
,
options
)
{
if
(
Object
.
prototype
.
toString
.
call
(
options
)
!==
'[object Object]'
)
return
;
for
(
var
attr
in
options
)
{
if
(
options
.
hasOwnProperty
(
attr
)
)
{
setCss
(
curEle
,
attr
,
options
[
attr
]
)
;
}
}
}
//->css：the style attributes of the operation element include settings individually, batch settings, access styles, and so on
function
css
(
)
{
var
arg
=
arguments
,
len
=
arg
.
length
,
fn
=
getCss
;
if
(
len
>=
3
)
fn
=
setCss
;
if
(
len
===
2
&&
typeof
arg
[
1
]
===
'object'
)
fn
=
setGroupCss
;
return
fn
.
apply
(
null
,
arg
)
;
}
//->offset：gets the offset of the current element distance BODY => {left:xxx,top:xxx}
function
offset
(
curEle
)
{
var
l
=
curEle
.
offsetLeft
,
t
=
curEle
.
offsetTop
,
p
=
curEle
.
offsetParent
;
while
(
p
&&
p
!==
document
.
body
)
{
if
(
!
/
M
S
I
E
8
/
i
.
test
(
navigator
.
userAgent
)
)
{
l
+=
p
.
clientLeft
;
t
+=
p
.
clientTop
;
}
l
+=
p
.
offsetLeft
;
t
+=
p
.
offsetTop
;
p
=
p
.
offsetParent
;
}
return
{
left
:
l
,
top
:
t
}
;
}
//->win：operate the box model properties about the browser
function
win
(
attr
,
value
)
{
if
(
typeof
value
!==
'undefined'
)
{
document
.
documentElement
[
attr
]
=
value
;
document
.
body
[
attr
]
=
value
;
return
;
}
return
document
.
documentElement
[
attr
]
||
document
.
body
[
attr
]
;
}
//->prev：gets the last brother element node
function
prev
(
curEle
)
{
if
(
isHighVersion
)
{
return
curEle
.
previousElementSibling
;
}
var
p
=
curEle
.
previousSibling
;
while
(
p
&&
p
.
nodeType
!==
1
)
{
p
=
p
.
previousSibling
;
}
return
p
;
}
//->next：gets the next brother element node
function
next
(
curEle
)
{
if
(
isHighVersion
)
return
curEle
.
nextElementSibling
;
var
n
=
curEle
.
nextSibling
;
while
(
n
&&
n
.
nodeType
!==
1
)
{
n
=
n
.
nextSibling
;
}
return
n
;
}
//->prevAll：gets all brother element nodes
function
prevAll
(
curEle
)
{
var
ary
=
[
]
,
p
=
curEle
.
previousSibling
;
while
(
p
)
{
if
(
p
.
nodeType
===
1
)
{
ary
.
unshift
(
p
)
;
}
p
=
p
.
previousSibling
;
}
return
ary
;
}
//->nextAll：gets all the brother element nodes
function
nextAll
(
curEle
)
{
var
ary
=
[
]
,
n
=
curEle
.
nextSibling
;
while
(
n
)
{
if
(
n
.
nodeType
===
1
)
{
ary
.
push
(
n
)
;
}
n
=
n
.
nextSibling
;
}
return
ary
;
}
//->siblings：gets all sibling element nodes
function
siblings
(
curEle
)
{
return
prevAll
(
curEle
)
.
concat
(
nextAll
(
curEle
)
)
;
}
//->index：gets the index of the current element
function
index
(
curEle
)
{
return
prevAll
(
curEle
)
.
length
;
}
//->firstChild：gets the first element child node of the current container
function
firstChild
(
curEle
)
{
if
(
isHighVersion
)
return
curEle
.
firstElementChild
;
var
f
=
curEle
.
firstChild
;
while
(
f
&&
f
.
nodeType
!==
1
)
{
f
=
f
.
nextSibling
;
}
return
f
;
}
//->lastChild：gets the last element child node of the current container
function
lastChild
(
curEle
)
{
if
(
isHighVersion
)
return
curEle
.
lastElementChild
;
var
l
=
curEle
.
lastChild
;
while
(
l
&&
l
.
nodeType
!==
1
)
{
l
=
l
.
previousSibling
;
}
return
l
;
}
//->children：gets all element child nodes of the container
function
children
(
curEle
,
tag
)
{
var
ary
=
[
]
,
nodeList
=
curEle
.
childNodes
;
for
(
var
i
=
0
;
i
<
nodeList
.
length
;
i
++
)
{
var
cur
=
nodeList
[
i
]
;
if
(
cur
.
nodeType
===
1
)
{
if
(
typeof
tag
!==
'undefined'
)
{
cur
.
tagName
.
toUpperCase
(
)
===
tag
.
toUpperCase
(
)
?
ary
.
push
(
cur
)
:
null
;
continue
;
}
ary
.
push
(
cur
)
;
}
}
return
ary
;
}
//->byClass：getElementsByClassName compliant processing, in the specified context, gets the elements that have these style classes by passing the style name class name
function
byClass
(
strClass
,
context
)
{
context
=
context
||
document
;
if
(
isHighVersion
)
return
[
]
.
slice
.
call
(
context
.
getElementsByClassName
(
strClass
)
)
;
strClass
=
strClass
.
replace
(
/
^
\s
+
|
\s
+
$
/
g
,
''
)
.
split
(
/
\s
+
/
g
)
;
var
tagList
=
context
.
getElementsByTagName
(
'*'
)
,
result
=
[
]
;
for
(
var
i
=
0
;
i
<
tagList
.
length
;
i
++
)
{
var
item
=
tagList
[
i
]
,
itemClass
=
item
.
className
;
var
isMatch
=
true
;
for
(
var
k
=
0
;
k
<
strClass
.
length
;
k
++
)
{
var
reg
=
new
RegExp
(
'(^| +)'
+
strClass
[
k
]
+
'( +|$)'
)
;
if
(
!
reg
.
test
(
itemClass
)
)
{
isMatch
=
false
;
break
;
}
}
isMatch
?
result
.
push
(
item
)
:
null
;
}
return
result
;
}
//->hasClass：verify that the current element has a style name
function
hasClass
(
curEle
,
strClass
)
{
strClass
=
strClass
.
replace
(
/
^
\s
+
|
\s
+
$
/
g
,
''
)
.
split
(
/
\s
+
/
g
)
;
var
isMatch
=
true
,
originalClass
=
curEle
.
className
;
for
(
var
i
=
0
;
i
<
strClass
.
length
;
i
++
)
{
var
item
=
strClass
[
i
]
;
var
reg
=
new
RegExp
(
'(^| +)'
+
item
+
'( +|$)'
)
;
if
(
!
reg
.
test
(
originalClass
)
)
{
isMatch
=
false
;
break
;
}
}
return
isMatch
;
}
//->addClass：increase the element's style name class name
function
addClass
(
curEle
,
strClass
)
{
strClass
=
strClass
.
replace
(
/
^
\s
+
|
\s
+
$
/
g
,
''
)
.
split
(
/
\s
+
/
g
)
;
for
(
var
i
=
0
;
i
<
strClass
.
length
;
i
++
)
{
var
item
=
strClass
[
i
]
;
if
(
hasClass
(
curEle
,
item
)
)
continue
;
curEle
.
className
+=
' '
+
item
;
}
curEle
.
className
=
curEle
.
className
.
replace
(
/
^
\s
+
|
\s
+
$
/
g
,
''
)
.
replace
(
/
\s
+
/
g
,
' '
)
;
}
//->removeClass：removes the name of the element's style class name
function
removeClass
(
curEle
,
strClass
)
{
strClass
=
strClass
.
replace
(
/
^
\s
+
|
\s
+
$
/
g
,
''
)
.
split
(
/
\s
+
/
g
)
;
var
originalClass
=
curEle
.
className
.
replace
(
/
\s
+
/
g
,
' '
)
;
for
(
var
i
=
0
;
i
<
strClass
.
length
;
i
++
)
{
var
item
=
strClass
[
i
]
,
reg
=
new
RegExp
(
'(^| )'
+
item
+
'( |$)'
,
'g'
)
;
reg
.
test
(
originalClass
)
?
originalClass
=
originalClass
.
replace
(
reg
,
' '
)
:
null
;
}
curEle
.
className
=
originalClass
.
replace
(
/
^
\s
+
|
\s
+
$
/
g
,
''
)
.
replace
(
/
\s
+
/
g
,
' '
)
;
}
//->append：appends elements at the end of the container
function
append
(
curEle
,
parent
)
{
parent
.
appendChild
(
curEle
)
;
}
//->prepend：appends elements to the beginning of the container
function
prepend
(
curEle
,
parent
)
{
var
first
=
firstChild
(
parent
)
;
first
?
parent
.
insertBefore
(
curEle
,
first
)
:
parent
.
appendChild
(
curEle
)
;
}
//->insertBefore：before appending to the specified element
function
insertBefore
(
curEle
,
oldEle
)
{
oldEle
.
parentNode
.
insertBefore
(
curEle
,
oldEle
)
;
}
//->insertAfter：after appending to the specified element
function
insertAfter
(
curEle
,
oldEle
)
{
var
nex
=
next
(
oldEle
)
,
p
=
oldEle
.
parentNode
;
nex
?
p
.
insertBefore
(
curEle
,
nex
)
:
p
.
appendChild
(
curEle
)
;
}
return
{
toArray
:
toArray
,
toJSON
:
toJSON
,
css
:
css
,
offset
:
offset
,
win
:
win
,
prev
:
prev
,
next
:
next
,
prevAll
:
prevAll
,
nextAll
:
nextAll
,
siblings
:
siblings
,
index
:
index
,
firstChild
:
firstChild
,
lastChild
:
lastChild
,
children
:
children
,
byClass
:
byClass
,
hasClass
:
hasClass
,
addClass
:
addClass
,
removeClass
:
removeClass
,
append
:
append
,
prepend
:
prepend
,
insertBefore
:
insertBefore
,
insertAfter
:
insertAfter
}
}
)
(
)
;
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