简单实现JSON字符串的可视化

JSON.stringify(value [, replacer] [, space])

<script type="text/javascript" >

$(document).ready(function() {
var obj = {
num: 1234,
str: '字符串',
arr: [1, 2, 3, 4, 5, 6],
obj: {
name: 'tom',
age: 10,
like: ['a', 'b']
}
};
var str = JSON.stringify(obj, undefined, 4);
alert(str);
output(syntaxHighlight(str));
});

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>';
});
}

</script>