How to use the delay function from underscore

In Underscore.js, the delay function is used to invoke a function after a specified delay time, using a setTimeout under the hood.

How does underscore.delay work?

underscore.delay is a function in the Underscore.js library that is used to invoke a function after a specified delay time.

When underscore.delay is called with a function and a delay time (in milliseconds) as input, it sets up a setTimeout timer for the specified delay time, and then invokes the function after that delay time has elapsed. The function is passed any additional arguments that were provided to underscore.delay after the delay time argument.

By using underscore.delay, developers can defer the execution of a function until a specified time has elapsed, which can be useful in situations where a delay is required, such as in animations or other visual effects. Additionally, because underscore.delay returns a timer ID, the function can be cancelled before it is invoked by calling clearTimeout with that timer ID as input.

Ai Example

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const _ = require("underscore");

// Defining a function to be invoked after a delay
const delayedFunction = (message) => {
  console.log(`Delayed message: ${message}`);
};

// Invoking the function after a delay of 3 seconds
const delayTime = 3000;
const timerId = _.delay(delayedFunction, delayTime, "Hello, world!");

// Cancelling the delayed function before it is invoked
clearTimeout(timerId);

In this example, we're using underscore.delay to invoke a function (delayedFunction) after a delay of 3 seconds. The delayedFunction function takes a single argument (message) which is passed to it when it is invoked. underscore.delay returns a timer ID, which can be used to cancel the delayed function before it is invoked. In this example, we're cancelling the function immediately after scheduling it by passing the timer ID to clearTimeout. When this code runs, it will output nothing to the console, because the delayedFunction is cancelled before it has a chance to execute. If you remove the call to clearTimeout, the delayedFunction will execute after the specified delay time (3 seconds in this case), and output the message "Delayed message: Hello, world!" to the console.