1、延遲函式delay
const delay = ms =
> new promise((resolve, reject)
=> settimeout(resolve, ms))
const getdata = status =
> new promise((resolve, reject)
=>
) const getres = async (data)
=>
catch (error)
} getres(true) // 隔了1秒
const listchunk =
(list, size = 1, cachelist =
)=>
while
(tmp.length)
return cachelist }
console.log(listchunk(
[1, 2, 3, 4, 5, 6, 7, 8, 9]
)) // [
[1], [2], [3], [4], [5], [6], [7], [8], [9]
] console.log(listchunk(
[1, 2, 3, 4, 5, 6, 7, 8, 9], 3)) // [
[1, 2, 3], [4, 5, 6], [7, 8, 9]
] console.log(listchunk(
[1, 2, 3, 4, 5, 6, 7, 8, 9], 0)) // [
] console.log(listchunk(
[1, 2, 3, 4, 5, 6, 7, 8, 9], -1)) // [
]
const intersection =
(list, ...args)
=> list.filter(item =
> args.every(list =
> list.includes(item)))
console.log(intersection(
[2, 1], [2, 3]
)) // [2]
console.log(intersection(
[1, 2], [3, 4]
)) // [
]
const curring = fn =
>
= fn
const curried =
(...args)
=>
return curried }
const listmerge =
(a, b, c)
=>
[a, b, c]
const curried = curring(listmerge)
console.log(curried(1)
(2)(3)) // [1, 2, 3]
console.log(curried(1, 2)
(3)) // [1, 2, 3]
console.log(curried(1, 2, 3)) // [1, 2, 3]
const trimstart = str =
> str.replace(new regexp(
'^([\\s]*)(.*)$'
), '$2'
) console.log(trimstart(
' abc '
)) // abc
console.log(trimstart(
'123 '
)) // 123
const trimend = str =
> str.replace(new regexp(
'^(.*?)([\\s]*)$'
), '$1'
) console.log(trimend(
' abc '
)) // abc
console.log(trimend(
'123 '
)) // 123
const getindex = el =
>
let index = 0
dowhile
(el = el.previouselementsibling)
;return index
}
const getoffset = el =
>
= el.getboundingclientrect(
) const
= document.body
return
}
const datatype = obj =
> object.prototype.tostring.call(obj).replace(/^\[object (.+)\]$/, '$1'
).tolowercase(
);
const ismobile =()
=>
'ontouchstart'
in window
const fade =
(el, type
='in')}
tick(
)}
const datapattern =
(str, format
='-')=
>
const datereg = new regexp(
`^(\\d
)$(\\d
)$(\\d
)$`)
const [, month, day, year]
= datereg.exec(str)
return new date(
`$, $ $`)
} console.log(datapattern(
'12-25-1995'
)) // mon dec 25 1995 00:00:00 gmt+0800 (中國標準時間)
const html = document.queryselector(
'html'
) html.oncopy =()
=>
false
html.onpaste =()
=>
false
const input = document.queryselector(
'input[type="text"]'
) const cleartext = target =
>
= target
target.value = value.replace(/[^\u4e00-\u9fa5]/g, '')}
input.onfocus =()
=>
input.onkeyup =()
=>
input.onblur =()
=>
input.oninput =()
=>
const removehtml =
(str ='')
=> str.replace(/<
[\/\!
]*[^<
>
]*>/ig, ''
) console.log(removehtml(
'')) // 哈哈哈哈《呵呵呵
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