1 import React from 'react'
 2 import styles from './json.less'
 3 
 4 const indent = <span>&nbsp;&nbsp;&nbsp;&nbsp;</span>
 5 
 6 const objectToJsonCode = (object = {}, objectKey = null, deepIndent = null, parentIsArray = false, isArray = false) => {
 7   const result = Object.entries(object).map(([key, value], index, data) => {
 8     if (value instanceof Array || value instanceof Object) {
 9       return <>
10         {objectToJsonCode(value, key, <>{deepIndent}{indent}</>, object instanceof Array, value instanceof Array)}
11         {data.length === index + 1 ? null : ','}
12         <br/>
13       </>
14     }
15     const type = Object.prototype.toString.call(value)
16     let className = 'string'
17     switch (type) {
18       case '[object Boolean]':
19         className = 'boolean'
20         break
21       case '[object String]':
22         className = 'string'
23         break
24       case '[object Number]':
25         className = 'number'
26         break
27       default:
28         className = 'string'
29     }
30     return (<>
31       {deepIndent}{indent}
32       {isArray ? null : <span className={styles.key}>{`"${key}": `}</span>}
33       <span className={styles[className]}>
34         {
35           (() => {
36             let valueString
37             switch (className) {
38               case 'string':
39                 valueString = `"${value}"`
40                 break
41               case 'boolean':
42                 valueString = value.toString()
43                 break
44               default:
45                 valueString = value
46             }
47             return valueString
48           })()
49         }
50       </span>
51       {data.length === index + 1 ? <br/> : ','}
52       {data.length !== index + 1 ? <br/> : null}
53     </>)
54   })
55 
56   if (object instanceof Array) {
57     return <>
58       {deepIndent}
59       {parentIsArray ? null : <span className={styles.key}>{objectKey === null ? '' : `"${objectKey}": `}</span>}
60       {result.length === 0 ?
61         <span>[]</span> :
62         <><span>[</span> <br/> {result} {deepIndent}<span>]</span></>
63       }
64     </>
65   }
66   return <>
67     {deepIndent}
68     {parentIsArray ? null : <span className={styles.key}>{objectKey === null ? '' : `"${objectKey}": `}</span>}
69     {result.length === 0 ?
70       <span>{'{}'}</span> :
71       <><span>{'{'}</span> <br/>{result} {deepIndent}<span>{'}'}</span></>
72     }
73   </>
74 }
75 
76 export default objectToJsonCode

1 pre {outline: 1px solid #ccc; padding: 5px; margin: 5px; }
2 .string { color: green; }
3 .number { color: darkorange; }
4 .boolean { color: blue; }
5 .null { color: magenta; }
6 .key { color: red; }

使用:

<pre style={{maxWidth:'640px'}}>{objectToJsonCode(jsonString)}</pre>   效果图: