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How do we remove a property from a JavaScript object? - JavaScript
Let’s say, we have an object as follows −
const myObject = { "ircEvent": "PRIVMSG", "method": "newURI", "regex": "^http://.*" };
We are required to illustrate the best way to remove the property regex to end up with new myObject?
Following is the solution −
const myObject = { "ircEvent": "PRIVMSG", "method": "newURI" };
The delete operator is used to remove properties from objects.
const myObject = { "ircEvent": "PRIVMSG", "method": "newURI", "regex": "^http://.*" }; delete myObject['regex']; console.log(myObject.hasOwnProperty("regex")); // false
The delete operator in JavaScript has a different function to that of the keyword in C and C++ −
It does not directly free memory. Instead, its sole purpose is to remove properties from objects.
Output
Following is the console output −
False
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