開発ツールでの対話例

(ブラウザの)開発ツールでの対話例

> 2*3
<- 6

> window
<- Window ▶{frames: Window, postMessage: ƒ, blur: ƒ, focus: ƒ, close: ƒ, …}

> window.document	
<- ▶#document

> document
<- ▶#document

> document.head
<- ▶<head>...</head>

> document.getElementsByTagName('h4')
<- (4)
   ▶ [h4#section, h4#javascript, h4#a-, h4#b-div, section: h4#section, javascript: h4#javascript, a-: h4#a-, b-div: h4#b-div]

> var x1= document.getElementsByTagName('h4')[0]
<- undefined

> x1
<- <h4 id="section">概要</h4>

> x1.textContent="ふぁいおえｊふぁいううぇふぃあううぇふぃあうｗｈｆ"
<- "ふぁいおえｊふぁいううぇふぃあううぇふぃあうｗｈｆ"