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53 lines
1.2 KiB
53 lines
1.2 KiB
3 years ago
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# json-stringify-safe
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Like JSON.stringify, but doesn't throw on circular references.
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## Usage
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Takes the same arguments as `JSON.stringify`.
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```javascript
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var stringify = require('json-stringify-safe');
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var circularObj = {};
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circularObj.circularRef = circularObj;
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circularObj.list = [ circularObj, circularObj ];
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console.log(stringify(circularObj, null, 2));
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```
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Output:
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```json
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{
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"circularRef": "[Circular]",
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"list": [
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"[Circular]",
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"[Circular]"
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]
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}
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```
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## Details
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```
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stringify(obj, serializer, indent, decycler)
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```
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The first three arguments are the same as to JSON.stringify. The last
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is an argument that's only used when the object has been seen already.
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The default `decycler` function returns the string `'[Circular]'`.
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If, for example, you pass in `function(k,v){}` (return nothing) then it
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will prune cycles. If you pass in `function(k,v){ return {foo: 'bar'}}`,
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then cyclical objects will always be represented as `{"foo":"bar"}` in
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the result.
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```
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stringify.getSerialize(serializer, decycler)
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```
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Returns a serializer that can be used elsewhere. This is the actual
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function that's passed to JSON.stringify.
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**Note** that the function returned from `getSerialize` is stateful for now, so
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do **not** use it more than once.
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