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JsonSyntaxHightLight

Html:

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<head>


<style>
pre {outline: 1px solid #ccc; padding: 5px; margin: 5px; }
.string { color: green; }
.number { color: darkorange; }
.boolean { color: blue; }
.null { color: magenta; }
.key { color: red; }
</style>

</head>
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<body>
<font color="red">ddd</font>
<pre>{
<span class="key">"a":</span> <span class="number">1</span>,
<span class="key">"b":</span> <span class="string">"foo"</span>,
<span class="key">"c":</span> [
<span class="boolean">false</span>,
<span class="string">"false"</span>,
<span class="null">null</span>,
<span class="string">"null"</span>,
{
<span class="key">"d":</span> {
<span class="key">"e":</span> <span class="number">130000</span>,
<span class="key">"f":</span> <span class="string">"1.3e5"</span>
}
}
]
}</pre>
<script type="text/javascript">
function output(inp) {
document.body.appendChild(document.createElement('pre')).innerHTML = inp;
}

function syntaxHighlight(json) {
json = json.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>');
return json.replace(/("(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g, function (match) {
var cls = 'number';
if (/^"/.test(match)) {
if (/:$/.test(match)) {
cls = 'key';
} else {
cls = 'string';
}
} else if (/true|false/.test(match)) {
cls = 'boolean';
} else if (/null/.test(match)) {
cls = 'null';
}
return '<span class="' + cls + '">' + match + '</span>';
});
}

var obj = {a:1, 'b':'foo', c:[false,'false',null, 'null', {d:{e:1.3e5,f:'1.3e5'}}]};
var str = JSON.stringify(obj, undefined, 4);

console.log(obj);
console.log(str);

//output(str);

console.log(syntaxHighlight(str))

output(syntaxHighlight(str));
</script>

</body>
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