使用 js 美化 json

//json美化

varformatJson=function(json,options){

varreg=null,

formatted='',

pad=0,

PADDING=' ';// one can also use '\t' or a different number of spaces

// optional settings

options=options|| {};

// remove newline where '{' or '[' follows ':'

options.newlineAfterColonIfBeforeBraceOrBracket=(options.newlineAfterColonIfBeforeBraceOrBracket===true)?true:false;

// use a space after a colon

options.spaceAfterColon=(options.spaceAfterColon===false)?false:true;

// begin formatting...

if(typeofjson!=='string'){

// make sure we start with the JSON as a string

json=JSON.stringify(json);

}else{

// is already a string, so parse and re-stringify in order to remove extra whitespace

json=JSON.parse(json);

json=JSON.stringify(json);

}

// add newline before and after curly braces

reg=/([\{\}])/g;

json=json.replace(reg,'\r\n$1\r\n');

// add newline before and after square brackets

reg=/([\[\]])/g;

json=json.replace(reg,'\r\n$1\r\n');

// add newline after comma

reg=/(\,)/g;

json=json.replace(reg,'$1\r\n');

// remove multiple newlines

reg=/(\r\n\r\n)/g;

json=json.replace(reg,'\r\n');

// remove newlines before commas

reg=/\r\n\,/g;

json=json.replace(reg,',');

// optional formatting...

if(!options.newlineAfterColonIfBeforeBraceOrBracket){

reg=/\:\r\n\{/g;

json=json.replace(reg,':{');

reg=/\:\r\n\[/g;

json=json.replace(reg,':[');

}

if(options.spaceAfterColon){

reg=/\:/g;

json=json.replace(reg,':');

}

$.each(json.split('\r\n'),function(index,node){

vari=0,

indent=0,

padding='';

if(node.match(/\{$/)||node.match(/\[$/)){

indent=1;

}else if(node.match(/\}/)||node.match(/\]/)){

if(pad!==0){

pad-=1;

}

}else{

indent=0;

}

for(i=0;i<pad;i++){

padding+=PADDING;

}

formatted+=padding+node+'\r\n';

pad+=indent;

});

returnformatted;

};