Rewrite `x == -0` ⇒ `Object.is(x, -0)`

JavaScript pattern

Convert any equality check with -0 to the more precise Object.is.

Details on on StackOverflow.

Apply with the Grit CLI
grit apply convert_negative_zero_equality_check_to_object_is

Basic example

BEFORE 
if (x == -0 || x !== -0) {
  foo();
}
AFTER 
if (Object.is(x, -0) || !Object.is(x, -0)) {
  foo();
}

Converts an if condition

BEFORE 
if (x == -0) {
  foo();
} else {
  foo();
}
AFTER 
if (Object.is(x, -0)) {
  foo();
} else {
  foo();
}

Converts a while condition

BEFORE 
while (x == -0) {
  foo();
}
AFTER 
while (Object.is(x, -0)) {
  foo();
}

Converts a for condition

BEFORE 
for (let x = 6; x != -0; x--) {
  foo();
}
AFTER 
for (let x = 6; !Object.is(x, -0); x--) {
  foo();
}

Converts complex conditions

BEFORE 
if (x == -0 && y != -0) {
  foo();
}
AFTER 
if (Object.is(x, -0) && !Object.is(y, -0)) {
  foo();
}