Check out the post for an example application, TL;DR: Here is a code snippet you can use to change the background color of an element. If you combine the features “property value shorthand” and “destructuring”, ECMAScript 6 gives you an elegant way to handle multiple return values. This is simply another way of solving your problem. If you want to assign a name to each returned value to make it more readable and easier to maintain, you can use an object: Can u suggest something. In order to return multiple values from a function, we can not directly return them. What we do is to create an object in the function, populate it with multiple values and return the object to caller. If you're trying to do a Python-like tuple, Javascript doesn't have a data structure with that syntax. => JS is a callback oriented language, and there is a little secret here for “returning multiple values” that nobody has yet mentioned, try this: bam! Every function returns a value, which by default is undefined. Otherwise, undefined is returned. The cumbersome part of course when assigning the values that come back to variables. Read our JavaScript Tutorial to learn all you need to know about functions. indexOf() returns the value’s position, so we only have to make sure the result is different from -1 (which is what indexOf() returns if the value isn’t found). The return value is "returned" back to the "caller": Perhaps one of the easiest ways to achieve this is to use an array. Converting timestamp to time ago in PHP e.g 1 day ago, 2 days ago…, © 2014 - All Rights Reserved - Powered by, object destructuring combined with property value shorthand, javascript – Angular 2+ Access/Change Variable from Lazy-Loaded component. Even though it is possible to return multiple values from a function using the techniques we discussed above, it is really not something you should do. JavaScript: Combine highest key values of multiple arrays into a single array Find indexes of multiple minimum value in an array in JavaScript Return values of printf() and scanf() in C Function Return. Any function is terminated when its lines of code end, or when the execution flow finds a returnkeyword. Here on OamaTech I write about programming as well as other tech related topics. Let's take a look at the following example: Visit my author page to learn more about me and what I am working on right now. Previous Page Print Page. Javascript - React - return multiple values. How to Return Multiple Values from a Function in JavaScript. The value of the first element in the array that satisfies the provided testing function. Questions: I want after lazy-load will be use NewDataSet I’ve tried add @Input() DataList or private DataList, but not working. dot net perls. Ecmascript 6 includes “destructuring assignments” (as kangax mentioned) so in all browsers (not just Firefox) you’ll be able to capture an array of values without having to make a named array or object for the sole purpose of capturing them. In JS, we can easily return a tuple with an array or object, but do not forget! (There is a full application in the post, In this post we are going to work with checkboxes. I want to point out that if you should change your code if you want to return multiple values like above. How can I solve this? In this post, we will see how to return multiple values from a method in JavaScript. February 26, 2020 Javascript Leave a comment. If you don’t have a specific reason for why you want to do it this way, then you should read the next few sections of this post as well. There are basically two ways that we will explore, the first one is using an array as a container, the second is to use an object. You are better off creating functions that take you one step closer to your end goal and then calling the functions individually. Some functions return just one value. If the function was invoked from a statement, JavaScript will "return" to execute the code after the invoking statement. This blog post explains why that is useful and how it works. Other than returning an array or an object as others have recommended, you can also use a collector function (similar to the one found in The Little Schemer): I made a jsperf test to see which one of the three methods is faster. A function cannot return multiple values. Next Page Let us start by looking at a few ways we can return multiple values from a JS function.