check if value exists in object javascript code example

Example 1: search if value exists in object javascript

var exists = Object.keys(obj).some(function(k) {
    return obj[k] === "test1";
});

Example 2: how to check if object exists in javascript

if (typeof maybeObject != "undefined") {
   alert("GOT THERE");
}

Example 3: test if property exists javascript

const hero = {
  name: 'Batman'
};

hero.hasOwnProperty('name');     // => true
hero.hasOwnProperty('realName'); // => false

Example 4: check if field exists in object javascript

if ('field' in obj) {
}

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Javascript Example

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