How do I remove a key from a JavaScript object

Question

Let s say we have an object with this format   var thisIsObject        Cow     Moo       Cat     Meow       Dog     Bark       I wanted to do a function that removes by key   removeFromObjectByKey  Cow

User · Answer

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    gt    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

User · Answer

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

User · Answer

It s as easy as   delete object keyname    or  delete object  keyname

[javascript] How do I remove a key from a JavaScript object?

Examples related to javascript