unicorn/no-instanceof-array Pedantic
What it does
Require Array.isArray()
instead of instanceof Array
.
Why is this bad?
The instanceof Array check doesn't work across realms/contexts, for example, frames/windows in browsers or the vm module in Node.js.
Examples
Examples of incorrect code for this rule:
javascript
array instanceof Array;
[1, 2, 3] instanceof Array;
Examples of correct code for this rule:
javascript
Array.isArray(array);
Array.isArray([1, 2, 3]);
How to use
To enable this rule in the CLI or using the config file, you can use:
bash
oxlint --deny unicorn/no-instanceof-array
json
{
"rules": {
"unicorn/no-instanceof-array": "error"
}
}