ts-r
  • Error
  • Reported by the lexer and parser

TS1125

Hexadecimal digit expected.

A hexadecimal number or escape has no hex digits where they are required, as in `0x` alone. Add the digits.

What it means

Hexadecimal literals (0x...) and escapes such as \x.. and \u.... need hexadecimal digits (0-9, a-f, A-F). This is reported when none or too few follow.

Example

index.ts
const n = 0x;
export {};
ts-r-check -p tsconfig.json --pretty false ts-r output
index.ts(1,13): error TS1125: Hexadecimal digit expected.

Recorded by node scripts/verify-examples.mjs with ts-r built from commit 6deaf01. The example uses the default tsconfig: strict, target: es2022, module: esnext, moduleResolution: bundler.

How to fix

  • Write the digits: 0xff.
  • In strings, a \u escape needs exactly four hex digits, or braces: \u{1F600}.