Use native JSON.stringify method.
Works with nested objects and all major browsers support this method.
str = JSON.stringify(obj);
str = JSON.stringify(obj, null, 4); // (Optional) beautiful indented output.
console.log(str); // Logs output to dev tools console.
alert(str); // Displays output using window.alert()
Link to Mozilla API Reference and other examples.
obj = JSON.parse(str); // Reverses above operation (Just in case if needed.)
Use a custom JSON.stringify replacer if you
encounter this Javascript error
“Uncaught TypeError: Converting circular structure to JSON”
If you want to print the object for debugging purposes, use the code:
var obj = {
prop1: ‘prop1Value’,
prop2: ‘prop2Value’,
child: {
childProp1: ‘childProp1Value’,
},
}
console.log(obj)
will display:
Note: you must only log the object. For example, this won’t work:
console.log(‘My object : ‘ + obj)
Note ‘: You can also use a comma in the log method, then the first line of the output will be the string and after that, the object will be rendered:
console.log(‘My object: ‘, obj);