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future-builder007
javascript-Pattern
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javascript-Pattern
/
函数节流.html
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47 lines (39 loc) · 1.13 KB
master
Breadcrumbs
javascript-Pattern
/
函数节流.html
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<!DOCTYPE html
>
<
html
lang
="
en
"
>
<
head
>
<
meta
charset
="
UTF-8
"
>
<
meta
name
="
viewport
"
content
="
width=device-width, initial-scale=1.0
"
>
<
meta
http-equiv
="
X-UA-Compatible
"
content
="
ie=edge
"
>
<
title
>
Document
</
title
>
</
head
>
<
body
>
<
script
>
var
throttle
=
function
(
fn
,
interval
)
{
var
_self
=
fn
;
// 保存需要被延迟执行的函数引用
var
timer
=
null
;
// 定时器
var
firstTime
=
true
;
// 是否是第一次调用
return
function
(
)
{
var
args
=
arguments
;
var
_me
=
this
;
if
(
firstTime
)
{
// 如果是第一次调用,不需要延迟执行
_self
.
apply
(
_me
,
args
)
;
return
firstTime
=
false
;
}
if
(
timer
)
{
// 如果定时器还在,说明前一次延迟执行还没有完成
return
false
;
}
timer
=
setTimeout
(
function
(
)
{
// 延迟一段时间执行
clearTimeout
(
timer
)
;
timer
=
null
;
_self
.
apply
(
_me
,
args
)
}
,
interval
||
500
)
}
}
window
.
onresize
=
throttle
(
function
(
)
{
console
.
log
(
1
)
}
,
500
)
</
script
>
</
body
>
</
html
>
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