In javascript, Map is used to store key-value pairs. The key-value pairs can be of both primitive and non-primitive types.
WeakMap is similar to Map with key differences:
- The keys and values in weakmap should always be an object.
- If there are no references to the object, the object will be garbage collected.
const map1 = new Map(); map1.set('Value', 1); const map2 = new WeakMap(); map2.set('Value', 2.3); // Throws an error let obj = {name:"Vijay"}; const map3 = new WeakMap(); map3.set(obj, {age:23});
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