javascript - How to get "computed" text content of an HTML node (whitespace adjusted) -

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i want able "computed" text content of html node, i.e. rendered browser.

example: consider following html:

<html>     <body>         <p>a             b             c          d             e             f &nbsp; g             <div>1</div><div>2</div>             <a>3</a><a>4</a>             <button onclick="javascript:alert(document.body.textcontent)">click  me</button>         </p>         <pre>h            i</pre>     </body> </html>

here's picture of how above html renders in chrome 41.0.2272.101 m on windows 7:

enter image description here

is there simple, or relatively simple, way approximate text of <body> node, example, in way captures fact html node boundaries "generate" whitespace (like boundary between <div> nodes in above example)?

i approximation of text of <body> node string like:

a b c d e f   g  1 2 34 click me h


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