Preface
In this article, we will explore the concept and practical implementation of custom Hooks for everyday development tasks. Specifically, we’ll create three custom debounce Hooks: useDebounceFn, useDebounce, and useDebounceEffect. Our goal is to enhance the utility of these general-purpose Hooks and boost overall development efficiency.
Debouncing
Debouncing is a widely used concept. Let’s have a quick overview:
- Example: input event. Originally, inputting 10 characters continuously would trigger the event 10 times. Using Debounce Hooks, the event can only be triggered once during intermittent input.
- Debouncing involves defining a certain continuous event to be triggered after a specified time delay.
A basic debouncing mechanism can be implemented using closures and timers:
function debounce(fn, delay) {
let timer = null
return function (...args) {
// Clear the timer when it is triggered next time, so that the event will not be executed until the new timer ends.
if (timer) {
clearTimeout(timer)
}
timer = setTimeout(() => {
fn.call(this, ...args)
}, delay)
}
}