Using Tuple. They return a string. JavaScript is not best language for developing highly optimal things anyways but if that is needed, you can consider putting your result on surrounding object or such techniques which are usually common performance tricks between JavaScript, Java and other languages. As with using an array, if you are wrapping your multiple values that are not really related into an object then you should redesign your code. How to Return Multiple Values from a Function in JavaScript. 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. I know these calculations are very simple, and you can do them all in one line and don’t need a whole function for them, but they are to illustrate the concepts. If you wrap your values inside an array then you are effectively returning only one object, which is perfectly legal. Next Page November 7, 2017 Start with the introduction chapter about JavaScript Functions and JavaScript Scope. This blog post explains why that is useful and how it works. Running the code above in the console produces the following output. Returning multiple values from an function using an object. We can return an array in Java. In order to return multiple values from a function, we can not directly return them. javascript – Align Absolutely Positioned Sticky Element to div inside Sibling? Code language: JavaScript (javascript) In this code, the firstName and lastName variables will take the first and second elements of the return array. Example 1: This example returns the array [“GFG_1”, “GFG_2”] containing multiple values. Leave a comment. Instead of using the class or struct , you can simply return Tuple object that contains … If you copy the above into the console you would see the following output. => 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! But we can return them in form of Array and Object. This produces code that is easier to read, maintain, and most of the time produces less bugs. This is the code where i bind the textbox to the returned string It is possible to return multiple values form JavaScript functions, but those values have to be wrapped inside some sort of container. A very common way to return multiple values in javascript is using an object literals, so something like: const myFunction = => { const firstName = "Alireza", familyName = "Dezfoolian", age = 35; return { firstName, familyName, age}; } and get the values like this: Another worth to mention newly introduced (ES6) syntax is use of object creation shorthand in addition to destructing assignment. There is a full application in the post going over, TL;DR: Here is a code snippet that you can use to change the text of a button when you click on it. The cumbersome part of course when assigning the values that come back to variables. This syntax can be polyfilled with babel or other js polyfiller for older browsers but fortunately now works natively with the recent versions of Chrome and Firefox. In my React component I have the following method to keep the state and props in sync: static getDerivedStateFromProps(nextProps, prevState) { return nextProps.filterName === prevState.filterName ? '' Java doesn’t support multi-value returns. In JS, we can easily return a tuple with an array or object, but do not forget! 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. This post is a part 3 of ECMAScript 6 Complete Tutorial post series. In this post, we will see how to return multiple values from a method in JavaScript. 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. I think Javascript only supports multiple return values as global variables with destructuring, so its not recommended. Most of the time people who are new to programming want to return multiple things from a function, but you should try not to. Multiple Return Values in JavaScript - A New Way. So in reality you are only returning one value, but that is a container that holds multiple values. If all returned elements are of same type. You are better off creating functions that take you one step closer to your end goal and then calling the functions individually. javascript – How to write image url in Spritesmith library? jquery – Scroll child div edge to parent div edge, javascript – Problem in getting a return value from an ajax script, Combining two form values in a loop using jquery, jquery – Get id of element in Isotope filtered items, javascript – How can I get the background image URL in Jquery and then replace the non URL parts of the string, jquery – Angular 8 click is working as javascript onload function. 1. 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 is an example at the end of the post how you might break up the examples that we go over below. If you liked this post and want to learn more about JS then you can check out this guide on how to get the current URL using JS and this on using JavaScript to get input. http://jsperf.com/returning-multiple-values-2. But others return many things—an assortment of values. If you copy the code from above into the console you should see the following output. If the function was invoked from a statement, JavaScript will "return" to execute the code after the invoking statement. In JS, we can easily return a tuple with an array or object, but do not forget! There were many different ways purposed by JavaScript developers for returning multiple values in an function. An expression in return statement — 1, 2, 3 — is nothing but a comma operator applied to numeric literals (1 , 2, and 3) sequentially, which eventually evaluates to the value of its last expression — 3. 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