element.contentEditable
ようわからん
by textboxio
HTML
<div>edit me</div>
<div contenteditable="true"><p>
edit me
</p></div>
<div contenteditable>edit me</div>
<div contenteditable="false">edit me</div>
<textarea>edit me</textarea>
<textarea contenteditable="true">edit me</textarea>
<textarea contenteditable>edit me</textarea>
<textarea contenteditable="false">edit me</textarea>
JavaScript
var div = document.getElementsByTagName("div");
var ta = document.getElementsByTagName("textarea");
console.log(div[0].contentEditable); //inherit
console.log(div[1].contentEditable); //true
console.log(div[2].contentEditable); //true
console.log(div[3].contentEditable); //false
console.log(ta[0].contentEditable); //inherit
console.log(ta[1].contentEditable); //true
console.log(ta[2].contentEditable); //true
console.log(ta[3].contentEditable); //false