Seyi Adebajo theseyi

## json.md

      
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                theseyi
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              August 29, 2015 14:09
                — forked from tmcw/json.md
            
          
    Moral Concerns

JSONP is not actually JSON with padding, it's Javascript code that's executed. JSON is not a real subset of Javascript and the way it is not is important to us: via UTFGrid, we are all UTF-8 masters.
JSONP is not safe: it's Javascript that's executed. It's trivial to XSS with JSONP, because JSONP is XSS. Just have a call like mapbox.load('foo.tilejson', …) and if foo.tilejson gets replaced with destroyYoursite(), it gets run. Compare to JSON.parse, which is, on purpose, not eval.
Practical Concerns

JSONP is questionable in terms of performance. To be fast, you want to have the same callback all the time so that you can cache the response. But this leads to a page like

  
## demo.html
<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        <title>Styling radios &amp; checkboxes using CSS3</title>
        <link rel="stylesheet" media="screen" href="styles.css" >
    </head>

    <body>
        <h1>Styling radios &amp; checkboxes using CSS3</h1>
	<!doctype html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>Styling radios & checkboxes using CSS3</title>
	<link rel="stylesheet" media="screen" href="styles.css" >
	</head>

	<body>
	<h1>Styling radios & checkboxes using CSS3</h1>