Then we check if each single property is a function.Īn easy way to make sure we don’t duplicate methods as we navigate the prototype chain (like constructor which is always present), we use a Set data structure that makes sure values are unique: const getMethods = ( obj ) => ) getMethods ( Date. The methods vary depending upon if you would like to search using an item or a predicate. It shows no sign that it is doing anything. Each time Firefox stops using the CPU and press Enter again. Enter the name of the method and press Enter.

We must first iterate the prototype chain and we list all the properties in an array. JavaScript has a handful of methods to help search and filter Arrays. Here are the steps to find the JavaScript method. To do that we must take a slightly different route. This lists only the methods defined on that specific object, not any method defined in its prototype chain. filter ( item => typeof obj = 'function' ) We determine if it’s a function by using typeof on it.įor example here is how we might create a utility function to do what we need: getMethods = ( obj ) => Object. Then we can filter the resulting array, to only include that property name if it’s a function. We can use the Object.getOwnPropertyNames() function to get all the property names linked to an object. Find out how to get an array with a JavaScript object methods

Find method in javascript