how to get json object key and value | javascript tutorials

how to get json object key and value? It's simple, i will show you the way of get json key and value in javascript.
this is javascript code.

<script>
var jsonObj = {"jack":"american","xiaoming":"chinese"};
for(var key in jsonObj){
 console.log(key+"==="+jsonObj[key]);
}
</script>

output string：

jack===american
xiaoming===chinese