Using JSON.Stringify
By @vamshisuram
Let’s say there is an object with properties "prop1", "prop2", "prop3". We can pass additional params to JSON.stringify to selectively write properties of the object to string like:
var obj = {
'prop1': 'value1',
'prop2': 'value2',
'prop3': 'value3'
};
var selectedProperties = ['prop1', 'prop2'];
var str = JSON.stringify(obj, selectedProperties);
// str
// {"prop1":"value1","prop2":"value2"}
The "str" will contain only info on selected properties only.
Instead of array we can pass a function also.
function selectedProperties(key, val) {
// the first val will be the entire object, key is empty string
if (!key) {
return val;
}
if (key === 'prop1' || key === 'prop2') {
return val;
}
return;
}
The last optional param it takes is to modify the way it writes the object to string.
var str = JSON.stringify(obj, selectedProperties, '\t\t');
/* str output with double tabs in every line.
{
"prop1": "value1",
"prop2": "value2"
}
*/
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