How do I remove a key from a JavaScript object?

 

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  • How do I remove a property from a JavaScript object? 33 answers

    • The delete operator allows you to remove a property from an object.

    The following examples all do the same thing. 

    // Example 1
var key = "Cow";
delete thisIsObject[key]; 

// Example 2
delete thisIsObject["Cow"];

// Example 3
delete thisIsObject.Cow;

    If you're interested, read Understanding Delete for an in-depth explanation.

    If you are using Underscore.js or Lodash, there is a function 'omit' that will do it.
    http://underscorejs.org/#omit 

    var thisIsObject= {
    'Cow' : 'Moo',
    'Cat' : 'Meow',
    'Dog' : 'Bark'
};
_.omit(thisIsObject,'Cow'); //It will return a new object

=> {'Cat' : 'Meow', 'Dog' : 'Bark'}  //result

    If you want to modify the current object, assign the returning object to the current object. 

    thisIsObject = _.omit(thisIsObject,'Cow');

    With pure JavaScript, use: 

    delete thisIsObject['Cow'];

    Another option with pure JavaScript. 

    thisIsObject.cow = undefined;

thisIsObject = JSON.parse(JSON.stringify(thisIsObject ));

    如果您使用的是JavaScript外壳，那么这很简单： 

    delete object.keyname;
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