File size: 1,490 Bytes
1e92f2d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | /* eslint-disable complexity */
/*
* Code taken from dequal/lite v2.0.0
* https://github.com/lukeed/dequal/blob/9aa73181ac7e081cd330cac67d313632ac04bb02/src/lite.js
*
* It adds a 3rd argument `compare(a, b)` that lets execute custom logic to
* compare values.
* We use it to skip comparing function references.
*/
const has = Object.prototype.hasOwnProperty;
export function dequal(
foo: any,
bar: any,
compare?: (a: any, b: any) => boolean
) {
// start of custom implementation
if (compare?.(foo, bar)) {
return true;
}
// end of custom implementation
let ctor;
let len;
if (foo === bar) return true;
if (foo && bar && (ctor = foo.constructor) === bar.constructor) {
if (ctor === Date) return foo.getTime() === bar.getTime();
if (ctor === RegExp) return foo.toString() === bar.toString();
if (ctor === Array) {
if ((len = foo.length) === bar.length) {
while (len-- && dequal(foo[len], bar[len], compare));
}
return len === -1;
}
if (!ctor || typeof foo === 'object') {
len = 0;
// eslint-disable-next-line guard-for-in, no-restricted-syntax
for (ctor in foo) {
if (has.call(foo, ctor) && ++len && !has.call(bar, ctor)) return false;
if (!(ctor in bar) || !dequal(foo[ctor], bar[ctor], compare))
return false;
}
return Object.keys(bar).length === len;
}
}
// eslint-disable-next-line no-self-compare
return foo !== foo && bar !== bar;
}
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