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noShoutyConstants (since v1.0.0)

Diagnostic Category: lint/style/noShoutyConstants

Disallow the use of constants which its value is the upper-case version of its name.

Examples

Section titled Examples

Invalid

Section titled Invalid
const FOO = "FOO";
console.log(FOO);
style/noShoutyConstants.js:1:7 lint/style/noShoutyConstants  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ Redundant constant declaration.
  
  > 1 │ const FOO = "FOO";
      │       ^^^^^^^^^^^
    2 │ console.log(FOO);
    3 │ 
  
  ℹ Used here.
  
    1 │ const FOO = "FOO";
  > 2 │ console.log(FOO);
      │             ^^^
    3 │ 
  
  ℹ You should avoid declaring constants with a string that's the same
        value as the variable name. It introduces a level of unnecessary
        indirection when it's only two additional characters to inline.
  
  ℹ Unsafe fix: Use the constant value directly
  
    1   │ - const·FOO·=·"FOO";
    2   │ - console.log(FOO);
      1 │ + 
      2 │ + console.log("FOO");
    3 3 │

Valid

Section titled Valid
let FOO = "FOO";
console.log(FOO);
export const FOO = "FOO";
console.log(FOO);
function f(FOO = "FOO") {
    return FOO;
}
Section titled Related links