Lodash is a javascript utility library (see https://lodash.com) that has several handy functions (it exports as an underscore “_”). First is the lodash debounce function. Hi guys, habe anyone sucessfully setup Lodash with Vuex? Recently, I was working on a project where I wanted the scroll event to invoke a function that would affect other elements on the page. Hi, I’m using the lodash debounce function in one of my components to reduce the number of ‘input’ events emitted. Expected behavior. Let's look at another example where there is an input field and you need to increment the count only after user stops typing for certain time. After some time passed I'm sure it's much easier to handle things by your own with setTimeout/clearTimeout(and moving that into separate custom hook) than working with functional helpers.Handling later one creates additional challenges right after we apply that to useCallback that can be recreated because of dependency change but we don't want to reset delay running. Let's set up a simple example: we will debounce your page scroll events while keeping your server up … I tried following the docs and this is what i came out with testSyntax: _.debounce( function(e){ console.log(e.target.value) } ), But i get ReferenceError: _ is not defined in my console. And there is text which is updated on every keystroke which re renders the component on every input. fakeAsync() and tick() should be able to be used to synchronously test debounced functions. Minimal reproduction of the problem with instructions I did a window._ = require(‘lodash’); If there are other ways of implementing this, please let me know. In this code, we're calling the debounce function inside the useEffect hook by passing an empty array [] as a second argument because this code needs to be executed only once.. And we're storing the result of the function in inputRef.current.inputRef is a ref created by calling useRef() hook. Debounce Example using useCallback or useRef Above example is pretty simple. A modern JavaScript utility library delivering modularity, performance, & extras. Sadly, this does not work. Using it again in removeEventListener actually creates a second instance of debounce,and it would therefore be impossible to match against the … Using fakeAsync() and tick() to test functions that are debounced with lodash.debounce() do not work as expected. Really stucked. 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