我如何以易于阅读(供人类阅读)的格式显示JSON?我主要寻找缩进和空白,甚至是颜色/字体样式等。
当前回答
这里有一些东西来修饰这个老掉牙但很好的问题。如果您想将格式化的对象转储到控制台,但它仍像一团包裹的乱麻一样转储,隐藏字符如下???
'{\n "_id": "630577bba145ff4f1",\n "role": "user"}'
但你想要这种可爱??:
{
"_id": "630557672d877bba145ff4f1",
"role": "user"
}
诀窍是将JSON.stringify()包装在console.log()语句中。如果你讨厌打字,尝试构建代码段来完成繁重的工作。。。
如果您正在处理大型对象,这非常有用。
在浏览器开发工具中的“代码段”部分添加一个代码段,如下所示(更多…):
let o = <object to print>
console.log(JSON.stringify(o, null, 4))
console.log(o)
然后简单地替换为对象(可以从当前上下文中获得)并运行代码段。
其他回答
下面是一个用React编写的简单JSON格式/颜色组件:
const HighlightedJSON = ({ json }: Object) => {
const highlightedJSON = jsonObj =>
Object.keys(jsonObj).map(key => {
const value = jsonObj[key];
let valueType = typeof value;
const isSimpleValue =
["string", "number", "boolean"].includes(valueType) || !value;
if (isSimpleValue && valueType === "object") {
valueType = "null";
}
return (
<div key={key} className="line">
<span className="key">{key}:</span>
{isSimpleValue ? (
<span className={valueType}>{`${value}`}</span>
) : (
highlightedJSON(value)
)}
</div>
);
});
return <div className="json">{highlightedJSON(json)}</div>;
};
看到它在这个CodePen中工作:https://codepen.io/benshope/pen/BxVpjo
希望这有帮助!
基于@user123444555621,稍显现代。
const clsMap = [
[/^".*:$/, "key"],
[/^"/, "string"],
[/true|false/, "boolean"],
[/null/, "key"],
[/.*/, "number"],
]
const syntaxHighlight = obj => JSON.stringify(obj, null, 4)
.replace(/&/g, '&')
.replace(/</g, '<')
.replace(/>/g, '>')
.replace(/("(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g, match => `<span class="${clsMap.find(([regex]) => regex.test(match))[1]}">${match}</span>`);
您还可以在js中指定颜色(不需要CSS)
const clsMap = [
[/^".*:$/, "red"],
[/^"/, "green"],
[/true|false/, "blue"],
[/null/, "magenta"],
[/.*/, "darkorange"],
]
const syntaxHighlight = obj => JSON.stringify(obj, null, 4)
.replace(/&/g, '&')
.replace(/</g, '<')
.replace(/>/g, '>')
.replace(/("(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g, match => `<span style="color:${clsMap.find(([regex]) => regex.test(match))[1]}">${match}</span>`);
和更少正则表达式的版本
const clsMap = [
[match => match.startsWith('"') && match.endsWith(':'), "red"],
[match => match.startsWith('"'), "green"],
[match => match === "true" || match === "false" , "blue"],
[match => match === "null", "magenta"],
[() => true, "darkorange"],
];
const syntaxHighlight = obj => JSON.stringify(obj, null, 4)
.replace(/&/g, '&')
.replace(/</g, '<')
.replace(/>/g, '>')
.replace(/("(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g, match => `<span style="color:${clsMap.find(([fn]) => fn(match))[1]}">${match}</span>`);
对Ruby的其他漂亮打印机不满意,我自己编写了(NeatJSON),然后将其移植到JavaScript,包括一个免费的在线格式化程序。该代码在MIT许可证下是免费的(相当宽松)。
功能(全部可选):
设置线宽并换行,使对象和数组在合适时保持在同一行上,否则每行换行一个值。如果愿意,对对象关键点排序。对齐对象关键点(对齐冒号)。将浮点数格式化为特定的小数位数,而不打乱整数。“短”换行模式将左括号和右括号/大括号与值放在同一行,提供一些人更喜欢的格式。对数组和对象的间距、括号之间、冒号和逗号之前/之后进行精细控制。函数可用于web浏览器和Node.js。
我将在这里复制源代码,这样这不仅仅是一个库的链接,但我鼓励您转到GitHub项目页面,因为它将保持最新,而下面的代码不会。
(function(exports){
exports.neatJSON = neatJSON;
function neatJSON(value,opts){
opts = opts || {}
if (!('wrap' in opts)) opts.wrap = 80;
if (opts.wrap==true) opts.wrap = -1;
if (!('indent' in opts)) opts.indent = ' ';
if (!('arrayPadding' in opts)) opts.arrayPadding = ('padding' in opts) ? opts.padding : 0;
if (!('objectPadding' in opts)) opts.objectPadding = ('padding' in opts) ? opts.padding : 0;
if (!('afterComma' in opts)) opts.afterComma = ('aroundComma' in opts) ? opts.aroundComma : 0;
if (!('beforeComma' in opts)) opts.beforeComma = ('aroundComma' in opts) ? opts.aroundComma : 0;
if (!('afterColon' in opts)) opts.afterColon = ('aroundColon' in opts) ? opts.aroundColon : 0;
if (!('beforeColon' in opts)) opts.beforeColon = ('aroundColon' in opts) ? opts.aroundColon : 0;
var apad = repeat(' ',opts.arrayPadding),
opad = repeat(' ',opts.objectPadding),
comma = repeat(' ',opts.beforeComma)+','+repeat(' ',opts.afterComma),
colon = repeat(' ',opts.beforeColon)+':'+repeat(' ',opts.afterColon);
return build(value,'');
function build(o,indent){
if (o===null || o===undefined) return indent+'null';
else{
switch(o.constructor){
case Number:
var isFloat = (o === +o && o !== (o|0));
return indent + ((isFloat && ('decimals' in opts)) ? o.toFixed(opts.decimals) : (o+''));
case Array:
var pieces = o.map(function(v){ return build(v,'') });
var oneLine = indent+'['+apad+pieces.join(comma)+apad+']';
if (opts.wrap===false || oneLine.length<=opts.wrap) return oneLine;
if (opts.short){
var indent2 = indent+' '+apad;
pieces = o.map(function(v){ return build(v,indent2) });
pieces[0] = pieces[0].replace(indent2,indent+'['+apad);
pieces[pieces.length-1] = pieces[pieces.length-1]+apad+']';
return pieces.join(',\n');
}else{
var indent2 = indent+opts.indent;
return indent+'[\n'+o.map(function(v){ return build(v,indent2) }).join(',\n')+'\n'+indent+']';
}
case Object:
var keyvals=[],i=0;
for (var k in o) keyvals[i++] = [JSON.stringify(k), build(o[k],'')];
if (opts.sorted) keyvals = keyvals.sort(function(kv1,kv2){ kv1=kv1[0]; kv2=kv2[0]; return kv1<kv2?-1:kv1>kv2?1:0 });
keyvals = keyvals.map(function(kv){ return kv.join(colon) }).join(comma);
var oneLine = indent+"{"+opad+keyvals+opad+"}";
if (opts.wrap===false || oneLine.length<opts.wrap) return oneLine;
if (opts.short){
var keyvals=[],i=0;
for (var k in o) keyvals[i++] = [indent+' '+opad+JSON.stringify(k),o[k]];
if (opts.sorted) keyvals = keyvals.sort(function(kv1,kv2){ kv1=kv1[0]; kv2=kv2[0]; return kv1<kv2?-1:kv1>kv2?1:0 });
keyvals[0][0] = keyvals[0][0].replace(indent+' ',indent+'{');
if (opts.aligned){
var longest = 0;
for (var i=keyvals.length;i--;) if (keyvals[i][0].length>longest) longest = keyvals[i][0].length;
var padding = repeat(' ',longest);
for (var i=keyvals.length;i--;) keyvals[i][0] = padRight(padding,keyvals[i][0]);
}
for (var i=keyvals.length;i--;){
var k=keyvals[i][0], v=keyvals[i][1];
var indent2 = repeat(' ',(k+colon).length);
var oneLine = k+colon+build(v,'');
keyvals[i] = (opts.wrap===false || oneLine.length<=opts.wrap || !v || typeof v!="object") ? oneLine : (k+colon+build(v,indent2).replace(/^\s+/,''));
}
return keyvals.join(',\n') + opad + '}';
}else{
var keyvals=[],i=0;
for (var k in o) keyvals[i++] = [indent+opts.indent+JSON.stringify(k),o[k]];
if (opts.sorted) keyvals = keyvals.sort(function(kv1,kv2){ kv1=kv1[0]; kv2=kv2[0]; return kv1<kv2?-1:kv1>kv2?1:0 });
if (opts.aligned){
var longest = 0;
for (var i=keyvals.length;i--;) if (keyvals[i][0].length>longest) longest = keyvals[i][0].length;
var padding = repeat(' ',longest);
for (var i=keyvals.length;i--;) keyvals[i][0] = padRight(padding,keyvals[i][0]);
}
var indent2 = indent+opts.indent;
for (var i=keyvals.length;i--;){
var k=keyvals[i][0], v=keyvals[i][1];
var oneLine = k+colon+build(v,'');
keyvals[i] = (opts.wrap===false || oneLine.length<=opts.wrap || !v || typeof v!="object") ? oneLine : (k+colon+build(v,indent2).replace(/^\s+/,''));
}
return indent+'{\n'+keyvals.join(',\n')+'\n'+indent+'}'
}
default:
return indent+JSON.stringify(o);
}
}
}
function repeat(str,times){ // http://stackoverflow.com/a/17800645/405017
var result = '';
while(true){
if (times & 1) result += str;
times >>= 1;
if (times) str += str;
else break;
}
return result;
}
function padRight(pad, str){
return (str + pad).substring(0, pad.length);
}
}
neatJSON.version = "0.5";
})(typeof exports === 'undefined' ? this : exports);
我想在这里展示我的jsonAnalyze方法,它只打印了JSON结构,但在某些情况下,打印整个JSON会更有用。
假设您有这样一个复杂的JSON:
let theJson = {
'username': 'elen',
'email': 'elen@test.com',
'state': 'married',
'profiles': [
{'name': 'elenLove', 'job': 'actor' },
{'name': 'elenDoe', 'job': 'spy'}
],
'hobbies': ['run', 'movies'],
'status': {
'home': {
'ownsHome': true,
'addresses': [
{'town': 'Mexico', 'address': '123 mexicoStr'},
{'town': 'Atlanta', 'address': '4B atlanta 45-48'},
]
},
'car': {
'ownsCar': true,
'cars': [
{'brand': 'Nissan', 'plate': 'TOKY-114', 'prevOwnersIDs': ['4532354531', '3454655344', '5566753422']},
{'brand': 'Benz', 'plate': 'ELEN-1225', 'prevOwnersIDs': ['4531124531', '97864655344', '887666753422']}
]
}
},
'active': true,
'employed': false,
};
然后该方法将返回如下结构:
username
email
state
profiles[]
profiles[].name
profiles[].job
hobbies[]
status{}
status{}.home{}
status{}.home{}.ownsHome
status{}.home{}.addresses[]
status{}.home{}.addresses[].town
status{}.home{}.addresses[].address
status{}.car{}
status{}.car{}.ownsCar
status{}.car{}.cars[]
status{}.car{}.cars[].brand
status{}.car{}.cars[].plate
status{}.car{}.cars[].prevOwnersIDs[]
active
employed
这是jsonAnalysis()代码:
function jsonAnalyze(obj) {
let arr = [];
analyzeJson(obj, null, arr);
return logBeautifiedDotNotation(arr);
function analyzeJson(obj, parentStr, outArr) {
let opt;
if (!outArr) {
return "no output array given"
}
for (let prop in obj) {
opt = parentStr ? parentStr + '.' + prop : prop;
if (Array.isArray(obj[prop]) && obj[prop] !== null) {
let arr = obj[prop];
if ((Array.isArray(arr[0]) || typeof arr[0] == "object") && arr[0] != null) {
outArr.push(opt + '[]');
analyzeJson(arr[0], opt + '[]', outArr);
} else {
outArr.push(opt + '[]');
}
} else if (typeof obj[prop] == "object" && obj[prop] !== null) {
outArr.push(opt + '{}');
analyzeJson(obj[prop], opt + '{}', outArr);
} else {
if (obj.hasOwnProperty(prop) && typeof obj[prop] != 'function') {
outArr.push(opt);
}
}
}
}
function logBeautifiedDotNotation(arr) {
retStr = '';
arr.map(function (item) {
let dotsAmount = item.split(".").length - 1;
let dotsString = Array(dotsAmount + 1).join(' ');
retStr += dotsString + item + '\n';
console.log(dotsString + item)
});
return retStr;
}
}
jsonAnalyze(theJson);
找不到任何能为控制台提供良好语法高亮显示的解决方案,所以这里是我的2p
安装并添加cli高亮显示依赖项
npm install cli-highlight --save
全局定义logjson
const highlight = require('cli-highlight').highlight
console.logjson = (obj) => console.log(
highlight( JSON.stringify(obj, null, 4),
{ language: 'json', ignoreIllegals: true } ));
Use
console.logjson({foo: "bar", someArray: ["string1", "string2"]});
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