javascriptjsonecmascript-5

Best way to find whether a value exists in a JSON object in javascript?

I have a single level JSON to search through for the presence of a given value. Is there is a compact method provided in ecma5 for the same ?

Solution

    1. Parse the JSON string with JSON.parse to get a JavaScript Object.

    2. Use in operator to check the member existence

      var jsObj = JSON.parse('{"p": 5}');
console.log(jsObj);
if ("p" in jsObj) {
    console.log("`p` exists");
}

      Output

      { p: 5 }
`p` exists