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Use Array#find() and Array#findLast() instead of filtering an array and then accessing the first or last element. find() stops iterating as soon as it finds a match and never allocates a new array — making it both clearer in intent and more efficient.
Recommended✅ recommended · ☑️ unopinionated
Fixable🔧 Auto-fixable
Suggestions💡 Has suggestions
This rule is fixable unless default values are used in destructuring. When a default value is present (e.g., const [item = fallback] = array.filter(…)), a suggestion is offered instead to choose between ?? or ||.

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Examples

const item = array.filter(x => isUnicorn(x))[0];

const item = array.filter(x => isUnicorn(x)).shift();

const [item] = array.filter(x => isUnicorn(x));

// Last element patterns (when checkFromLast is true)
const item = array.filter(x => isUnicorn(x)).at(-1);

const item = array.filter(x => isUnicorn(x)).pop();

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Options

Type: object

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checkFromLast

Type: boolean
Default: true Controls whether the rule also checks patterns that can be replaced with findLast(). Set to false to allow .filter(…).at(-1) and .filter(…).pop(). 
/* eslint unicorn/prefer-array-find: ["error", {"checkFromLast": false}] */

// Passes — not reported when checkFromLast is false
const item = array.filter(x => isUnicorn(x)).at(-1);
const item = array.filter(x => isUnicorn(x)).pop();

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