unicorn/no-array-method-this-argument Style ​
What it does ​
Disallows the use of the thisArg parameter in array iteration methods such as map, filter, some, every, and similar.
Why is this bad? ​
The thisArg parameter makes code harder to understand and reason about. Instead, prefer arrow functions or bind explicitly in a clearer way. Arrow functions inherit this from the lexical scope, which is more intuitive and less error-prone.
Examples ​
Examples of incorrect code for this rule:
js
array.map(function(x) {
return x + this.y;
}, this);
array.filter(function(x) {
return x !== this.value;
}, this);Examples of correct code for this rule:
js
array.map(x => x + this.y);
array.filter(x => x !== this.value);
const self = this;
array.map(function(x) {
return x + self.y;
});How to use ​
To enable this rule in the CLI or using the config file, you can use:
bash
oxlint --deny unicorn/no-array-method-this-argumentjson
{
"rules": {
"unicorn/no-array-method-this-argument": "error"
}
}