write html/text to any node

annotated.js

function(
  a, // dom node: only document, element, text, comment, or attribute supported
  b, // text or html to write
  c
){
  c = a.nodeType;    // get the node type
  c > 8              // if it's the document
    ? a.close(       // close the document after
        a.open(),    // opening it and
        a.write(b)   // writing the html,
      )
    : a[             // otherwise, on the node
      [              // get the appropriate property,
        ,            // (elided placeholder for 0)
        "innerHTML", // "innerHTML" for nodeType==1 (elements),
        "value"      // "value" for nodeType==2 (attributes),
      ][c]           // based on the nodeType,
      || "nodeValue" // or use "nodeValue" (comments and text nodes),
    ] = b            // and set the text or html.
}

index.js

function(a,b,c){c=a.nodeType;c>8?a.close(a.open(),a.write(b)):a[[,"innerHTML","value"][c]||"nodeValue"]=b}

LICENSE.txt

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

package.json

{
  "name": "write",

  "description": "write html/text to any node",

  "keywords": [
    "innerHTML",
    "write",
    "attribute",
    "DOM"
  ]
}

Consider adding:

c == 1 && "value" in a ? c = 2 : 0 //If the element has the 'value' property, force it into an attribute type

to support setting the value of an input element?