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Rslint

    no-plusplus

    Added in v0.8.1

    Configuration

    rslint.config.ts
    import { defineConfig, js } from '@rslint/core';

export default defineConfig([
  js.configs.recommended,
  {
    rules: {
      'no-plusplus': 'error',
    },
  },
]);

    Rule Details

    Because the unary ++ and -- operators are subject to automatic semicolon insertion, differences in whitespace can change the semantics of source code.

    This rule disallows the unary operators ++ and --.

    Examples of incorrect code for this rule:

    let foo = 0;
foo++;

let bar = 42;
bar--;

for (let i = 0; i < l; i++) {
  doSomething(i);
}

    Examples of correct code for this rule:

    let foo = 0;
foo += 1;

let bar = 42;
bar -= 1;

for (let i = 0; i < l; i += 1) {
  doSomething(i);
}

    Options

    This rule has an object option.

    • "allowForLoopAfterthoughts": true allows unary operators ++ and -- in the afterthought (final expression) of a for loop.

    allowForLoopAfterthoughts

    Examples of correct code for this rule with the { "allowForLoopAfterthoughts": true } option:

    { "no-plusplus": ["error", { "allowForLoopAfterthoughts": true }] }
    for (let i = 0; i < l; i++) {
  doSomething(i);
}

for (let i = l; i >= 0; i--) {
  doSomething(i);
}

for (let i = 0, j = l; i < l; i++, j--) {
  doSomething(i, j);
}

    Examples of incorrect code for this rule with the { "allowForLoopAfterthoughts": true } option:

    for (let i = 0; i < l; j = i++) {
  doSomething(i, j);
}

for (let i = l; i--; ) {
  doSomething(i);
}

for (let i = 0; i < l; ) i++;

    Original Documentation