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no-unsafe-plusplus

Disallow unsafe and confusing uses of the ++ and -- operators.

Rule Details​

This rule heavily restricts the usage of the ++ and -- operators. Essentially, you are only allowed to use "foo++" in places where swapping it to "++foo" or "foo += 1" would have no functional change in the program.

This rule is meant to be used in conjunction with this prefer-plusplus and prefer-postfix-plusplus ESLint rules.

// Bad
foo++, foo++, foo++;
for (foo++; ; ) {}
for (; foo++; ) {}
foo++ + foo++;
array[foo++];

// Good
foo++;
void foo++;
foo++, foo++, 0;
for (; ; foo++) {}

Options and Defaults​

{
  "rules": {
    "complete/no-unsafe-plusplus": "error"
  }
}

This rule is not configurable.

Credits​

This rule was originally created by webstrand in the TypeScript Discord.

Resources​