blur方法用来移除当前元素所获得的键盘焦点.
element.blur()
blur
HTMLElement
contentEditable
contextMenu
dataset
dir
hidden
innerText
isContentEditable
lang
nonce
offsetHeight
offsetLeft
offsetParent
offsetTop
offsetWidth
onabort
onanimationcancel
onanimationend
onanimationiteration
onauxclick
onblur
oncancel
oncanplay
oncanplaythrough
onchange
onclick
onclose
oncontextmenu
oncopy
oncuechange
oncut
ondblclick
ondurationchange
onended
onerror
onfocus
ongotpointercapture
oninput
oninvalid
onkeydown
onkeypress
onkeyup
onload
onloadeddata
onloadedmetadata
onloadend
onloadstart
onlostpointercapture
onmousedown
onmouseenter
onmouseleave
onmousemove
onmouseout
onmouseover
onmouseup
onpaste
onpause
onplay
onpointercancel
onpointerdown
onpointerenter
onpointerleave
onpointermove
onpointerout
onpointerover
onpointerup
onreset
onresize
onscroll
onselect
onselectionchange
onselectstart
onsubmit
ontouchcancel
ontouchstart
ontransitioncancel
ontransitionend
onwheel
outerText
style
tabIndex
title
blur()
click
focus
forceSpellCheck()
Element
Node
EventTarget