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js arrow function underscore as param or empty brackets

Radguru answered on January 18, 2023 Popularity 2/10 Helpfulness 1/10

answer js arrow function underscore as param or empty brackets

js arrow function underscore as param or empty brackets

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/**
* () says that the function does not expect any arguments, 
* it doesn't declare any parameters. The function's .length is 0.
**/
const f1 = () => {}

/**
* If you use _, it explicitly states that the function will be passed one argument,
* but that you don't care about it. 
* The function's .length will be 1, which might matter in some frameworks.
**/
const f2 = _ => {}

Popularity 2/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: brackets function javascript param

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Contributed on Jan 18 2023

Radguru

0 Answers Avg Quality 2/10

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js arrow function underscore as param or empty brackets

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