JavaScript Map delete() Method Last Updated : 11 Jul, 2025 Comments Improve Suggest changes Like Article Like Report JavaScript Map.delete() method is used to delete the specified element among all the elements that are present in the map. The Map.delete() method takes the key that needs to be removed from the map, thus removing the element associated with that key and returning true. If the key is not present then it returns false. Syntax:my_map.delete(key);Parameters:key: The element associated with this key is to be removed from the mapReturn value:The Map. delete() method returns true if the key is present whose associated element is to be removed which is passed as an argument, otherwise returns false.Example 1: The key '3' is present in the map hence element associated with it is removed and returns true. javascript // creating a map object let my_map = new Map(); // Adding [key, value] pair to the map my_map.set(1, 'first'); my_map.set(2, 'second'); my_map.set(3, 'third'); my_map.set(4, 'fourth'); // will display true as key '3' // is present and its associated // element is removed as well console.log(my_map.delete(3)); // elements left in the map after deletion console.log("key-value pair of the map", " after deletion-"); my_map.forEach(function (item, key, mapObj) { console.log(key.toString(), ":", " ", item.toString()); }); Output:truekey-value pair of the map after deletion-1: first2: second4: fourthExample 2: The key '5' is not present in the map hence it returns false. javascript // creating a map object let my_map = new Map(); // Adding [key, value] pair to the map my_map.set(1, 'first'); my_map.set(2, 'second'); my_map.set(3, 'third'); my_map.set(4, 'fourth'); // will display false as key '5' // is not present and its associated // element is removed as well console.log(my_map.delete(5)) // elements left in the map after deletion console.log("key-value pair of the map", " after deletion-"); my_map.forEach(function (item, key, mapObj) { console.log(key.toString(), ":", " ", item.toString()); }); Output:falsekey-value pair of the map after deletion-1: first2: second3: third4: fourthSupported Browsers:Chrome EdgeFirefox Opera safari Comment More info A akash1295 Follow Improve Article Tags : JavaScript Web Technologies javascript-map JavaScript-Methods Explore JavaScript BasicsIntroduction to JavaScript4 min readVariables and Datatypes in JavaScript6 min readJavaScript Operators5 min readControl Statements in JavaScript4 min readArray & StringJavaScript Arrays7 min readJavaScript Array Methods7 min readJavaScript Strings6 min readJavaScript String Methods9 min readFunction & ObjectFunctions in JavaScript5 min readJavaScript Function Expression3 min readFunction Overloading in JavaScript4 min readObjects in Javascript4 min readJavaScript Object Constructors4 min readOOPObject Oriented Programming in JavaScript3 min readClasses and Objects in JavaScript4 min readWhat Are Access Modifiers In JavaScript ?5 min readJavaScript Constructor Method7 min readAsynchronous JavaScriptAsynchronous JavaScript2 min readJavaScript Callbacks4 min readJavaScript Promise4 min readEvent Loop in JavaScript4 min readAsync and Await in JavaScript2 min readException HandlingJavascript Error and Exceptional Handling6 min readJavaScript Errors Throw and Try to Catch2 min readHow to create custom errors in JavaScript ?2 min readJavaScript TypeError - Invalid Array.prototype.sort argument1 min readDOMHTML DOM (Document Object Model)9 min readHow to select DOM Elements in JavaScript ?3 min readJavaScript Custom Events4 min readJavaScript addEventListener() with Examples9 min readAdvanced TopicsClosure in JavaScript4 min readJavaScript Hoisting6 min readJavascript Scope3 min readJavaScript Higher Order Functions7 min readDebugging in JavaScript4 min read Like