# JSON.stringify出现：Converting circular structure to JSON
```
// Note: cache should not be re-used by repeated calls to JSON.stringify.
var cache = [];
JSON.stringify(obj, function(key, value) {
if (typeof value === ‘object‘ && value !== null) {
if (cache.indexOf(value) !== -1) {
// Circular reference found, discard key
return;
}
// Store value in our collection
cache.push(value);
}
return value;
});
cache = null; // Enable garbage collection
```JS-JSON
原文：https://www.cnblogs.com/jffun-blog/p/10206558.html
