https://stackoverflow.com › questions › 14076448

pass callback function (s) to getState() to tell it what to do when a response is received. arrange for getState() to return a special type of object called a "promise" which can be handled where getState() is called, in such a way that it will respond when the server has responded.

https://developer.mozilla.org › fr › docs › Web › JavaScript › Reference › Statements › return

return - JavaScript | MDN. L'instruction return met fin à l'exécution d'une fonction et définit une valeur à renvoyer à la fonction appelante. Exemple interactif. Syntaxe. js. return [expression]; L'expression dont on souhaite renvoyer la valeur. Si elle est absente, la valeur renvoyée par défaut sera undefined. Description.

https://www.w3schools.com › jsref › jsref_return.asp

Syntax. return value; Parameters. More Examples. Calculate the product of two numbers and return the result: // Call a function and save the return value in x: var x = myFunction (4, 3); function myFunction (a, b) { // Return the product of a and b return a * b; } Try it Yourself » JavaScript Tutorial: JavaScript Functions.

https://stackoverflow.com › questions › 68444458

To accomplish this task, you need to do the following: Create a variable called myFriend using one of the variable declarations described above. Set the variable you created to contain your friend's name. Inside the greetings function, return the string: "Greetings [your-friend's-name]."

https://developer.mozilla.org › fr › docs › Learn › JavaScript › Building_blocks › Return_values

Pour retourner une valeur d'une fonction que vous avez créée, vous devez utiliser le mot-clef return. Nous avons vu son utilisation dans l'exemple random-canvas-circles.html. La fonction draw() dessine 100 cercles aléatoires dans un élément HTML <canvas> : js. ctx.clearRect(0, 0, WIDTH, HEIGHT); for (let i = 0; i < 100; i++) { .

https://developer.mozilla.org › fr › docs › Web › JavaScript › Reference › Global_Objects › String

La première façon consiste à utiliser la méthode charAt() : js. return "chat".charAt(2); // renvoie "a" La seconde méthode, introduite avec ECMAScript 5, est de manipuler la chaîne comme un tableau, où les caractères sont les éléments du tableau et ont un indice correspondant à leur position : js. return "chat"[2]; // renvoie "a"

https://javascript.info › string

There are 3 methods in JavaScript to get a substring: substring, substr and slice. Returns the part of the string from start to (but not including) end. For instance:

https://web.dev › learn › javascript › functions › return

JavaScript. The return keyword bookmark_border. Use return to specify the value that the function should produce as a final result. When the interpreter reaches a return statement, the function that contains that statement immediately ends, and the specified value is returned to the context where the function was called:

http://devdoc.net › web › developer.mozilla.org › en-US › docs › Learn › JavaScript › Building_blocks › Return_values.html

Some functions don't return a significant value after completion, but others do, and it's important to understand what their values are, how to make use of them in your code, and how to make your own custom functions return useful values. We'll cover all of these below. What are return values?

https://www.geeksforgeeks.org › how-to-use-return-in-javascript

JavaScript. function sum(firstNumber, secondNumber) { return firstNumber + secondNumber; } console.log(sum(1, 2)) Output 3 . Functions in JavaScript are not just limited or bounded to return specific data types, but they can return different data types based on the logic that is defined inside the function.