I'm attempting to verify if a received string is JSON and I experimented with the code below:
try {
JSON.parse(-10); // Also tried with "-10"
}catch(e) {
console.log('inside catch');
}
Surprisingly, the code never enters the catch block! What could be the reason behind this?
A simple value is considered valid in JSON format. This explains why the message 'inside catch' isn't being displayed.
document.write(JSON.parse(-10));On the other hand, the following is not valid JSON:
try {
JSON.parse('{');
}catch(e) {
document.write('inside catch');
}It's evident that the try/catch mechanism is functioning as expected.
I believe that JSON.parse can handle the value of -10.
JSON.parse('{}'); // {}
JSON.parse('true'); // true
JSON.parse('"foo"'); // "foo"
JSON.parse('[1, 5, "false"]'); // [1, 5, "false"]
JSON.parse('null'); // null
try {
var a = JSON.parse("{[]]]["); // Same for "-10"
console.log(a);
}catch(e) {
console.log('inside catch');
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