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JavaScript
JavaScript
JavaScript
, !
alert
"use strict"
( ) ?
: alert, prompt, confirm
,
: if, '?'
if ( )
JavaScript
'if' '?'
'if..else' '?'
alert ()?
alert ()?
alert ()?
alert ()?
?
(||=, &&=)?
"if"
: '??', '??='
?
?
??, ??=
while for
while?
for?
for while
,
"switch"
"if", "switch"
"if" "switch"
"else"?
, '?' '||'
min(a, b)
pow(x,n)
Function Expression
,
-
JavaScript
-
c Mocha
?
:
, object
-?
2
, "this"
"this"
, "new"
-
, new Calculator
new Accumulator
'?.'
Symbol
?
6.35.toFixed(1) == 6.3?
min max
min max
?
border-left-width borderLeftWidth
" "
Map Set
WeakMap WeakSet
" "
Object.keys, values, entries
?
?
?
?
JSON, toJSON
JSON,
,
?
?
?
if
?
"var"
, NFE
"new Function"
: setTimeout setInterval
setTimeout?
, call/apply
-
debounce
(throttling)
bind
bind
, "this"
,
-
,
?
?
F.prototype
"prototype"
"f.defer(ms)"
"defer()"
, __proto__
toString
:
?
: "instanceof"
instanceof
, "try..catch"
Finally ?
, Error
SyntaxError
, async/await
:
"" ?
: then catch
:
setTimeout
Promise API
Async/await
, async/await
, async/await
async ""
,
,
Proxy Reflect
Observable
Eval:
Eval-
"this"
,
^, |, &?
?
BigInt
,
Intl: JavaScript
WeakRef FinalizationRegistry
: , ,
,
DOM-
DOM-
DOM
: getElement*, querySelector*
: ,
nodeType?
DOM- "document"?
createTextNode vs innerHTML vs textContent
"aaa"?
setInterval
HTML
CSS- width clientWidth
( )
( )
?
""
return false?
: mouseover/out, mouseenter/leave
""
Drag'n'Drop
: keydown keyup
/
,
: focus/blur
div
TD
,
: change, input, cut, copy, paste
: submit
: DOMContentLoaded, load, beforeunload, unload
: async, defer
: onload onerror
MutationObserver:
Selection Range
:
?
?
window
clickjacking
ArrayBuffer,
TextDecoder TextEncoder
Blob
File FileReader
Fetch
GitHub
FormData
Fetch:
Fetch:
Fetch:
Origin?
Fetch API
URL
XMLHttpRequest
WebSocket
Server Sent Events
, document.cookie
LocalStorage, sessionStorage
IndexedDB
CSS-
(CSS)
(CSS)
JavaScript-
,
-
(Custom Elements)
" "
Shadow DOM
"template"
DOM,
DOM
DOM
:
: "u" \p{...}
: ^ $
^$
^ $, "m"
: \b
,
[...]
Java[^script]
hh:mm hh-mm
+, *, ? {n}
"..." ?
HTML-
/d+? d+?/
HTML-
HTML-
MAC-
#abc #abcdef
: \N \k<>
() |
BB-
, "y"
RegExp String
CSS JavaScript-
: px, em, rem
display
float
inline-block float
(CSS)
,
position
(CSS)
+
vertical-align + table-cell + position = ?
font-size line-height
white-space
outline
box-sizing
margin
margin?
INPUT
IMG
overflow
height %
?
,
,
CSS-
CSS
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