oxc-project/oxc · error · OxcDiagnostic

Use `Number.{method_name}` instead of the global `{method_na

Error message

Use `Number.{method_name}` instead of the global `{method_name}`

What it means

Diagnostic from the unicorn/prefer-number-properties lint rule. It fires when a deprecated global numeric function or constant is used — e.g. `parseInt`, `parseFloat`, `isNaN`, `isFinite`, `NaN`, `Infinity` (named in the message) — instead of the ES2015+ equivalents on the `Number` namespace (`Number.parseInt`, `Number.isNaN`, `Number.NaN`, ...). The `Number.*` forms avoid implicit global coercion and are the standardized API. It is a lint suggestion, not a runtime error.

Source

Thrown at crates/oxc_linter/src/rules/unicorn/prefer_number_properties.rs:20

    AstKind,
    ast::{Expression, UnaryExpression, UnaryOperator, match_member_expression},
};
use oxc_diagnostics::OxcDiagnostic;
use oxc_macros::declare_oxc_lint;
use oxc_span::{GetSpan, Span};
use schemars::JsonSchema;
use serde::Deserialize;

use crate::{
    AstNode,
    context::LintContext,
    fixer::RuleFixer,
    globals::GLOBAL_OBJECT_NAMES,
    rule::{DefaultRuleConfig, Rule},
};

fn prefer_number_properties_diagnostic(span: Span, method_name: &str) -> OxcDiagnostic {
    OxcDiagnostic::warn(format!("Use `Number.{method_name}` instead of the global `{method_name}`"))
        .with_help(format!("Replace it with `Number.{method_name}`"))
        .with_label(span)
}

#[derive(Debug, Default, Clone, Deserialize)]
pub struct PreferNumberProperties(Box<PreferNumberPropertiesConfig>);

impl std::ops::Deref for PreferNumberProperties {
    type Target = PreferNumberPropertiesConfig;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

#[derive(Debug, Clone, JsonSchema, Deserialize)]
#[serde(rename_all = "camelCase", default, deny_unknown_fields)]
pub struct PreferNumberPropertiesConfig {

View on GitHub (pinned to e1e7af627c)

Solutions

1. Replace `parseInt(x, r)` with `Number.parseInt(x, r)`
2. Replace `isNaN`/`isFinite` with `Number.isNaN`/`Number.isFinite` (note the stricter, non-coercing semantics)
3. Replace bare `NaN`/`Infinity` with `Number.NaN`/`Number.POSITIVE_INFINITY`
4. Apply the rule's auto-fix

When it happens

Trigger: Thrown at crates/oxc_linter/src/rules/unicorn/prefer_number_properties.rs:20 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of oxc-project/oxc@e1e7af627c (2026-08-20). Data as JSON: /api/errors/745cb695e640b147. Report an issue: GitHub.