element.js
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/* @flow */
import { inBrowser } from 'core/util/env'
import { makeMap } from 'shared/util'
export const namespaceMap = {
svg: 'http://www.w3.org/2000/svg',
math: 'http://www.w3.org/1998/Math/MathML'
}
export const isHTMLTag = makeMap(
'html,body,base,head,link,meta,style,title,' +
'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
'embed,object,param,source,canvas,script,noscript,del,ins,' +
'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
'output,progress,select,textarea,' +
'details,dialog,menu,menuitem,summary,' +
'content,element,shadow,template,blockquote,iframe,tfoot'
)
// this map is intentionally selective, only covering SVG elements that may
// contain child elements.
export const isSVG = makeMap(
'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
true
)
export const isPreTag = (tag: ?string): boolean => tag === 'pre'
export const isReservedTag = (tag: string): ?boolean => {
return isHTMLTag(tag) || isSVG(tag)
}
export function getTagNamespace (tag: string): ?string {
if (isSVG(tag)) {
return 'svg'
}
// basic support for MathML
// note it doesn't support other MathML elements being component roots
if (tag === 'math') {
return 'math'
}
}
const unknownElementCache = Object.create(null)
export function isUnknownElement (tag: string): boolean {
/* istanbul ignore if */
if (!inBrowser) {
return true
}
if (isReservedTag(tag)) {
return false
}
tag = tag.toLowerCase()
/* istanbul ignore if */
if (unknownElementCache[tag] != null) {
return unknownElementCache[tag]
}
const el = document.createElement(tag)
if (tag.indexOf('-') > -1) {
// http://stackoverflow.com/a/28210364/1070244
return (unknownElementCache[tag] = (
el.constructor === window.HTMLUnknownElement ||
el.constructor === window.HTMLElement
))
} else {
return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
}
}
export const isTextInputType = makeMap('text,number,password,search,email,tel,url')