---
source: crates/rome_formatter_test/src/snapshot_builder.rs
info:
  test_file: js/no-semi/no-semi.js
---

# Input

```js

// with preexisting semi

x; [1, 2, 3].forEach(fn)
x; [a, b, ...c] = [1, 2]
x; /r/i.test('r')
x; +1
x; - 1
x; ('h' + 'i').repeat(10)
x; (1, 2)
x; (() => {})()
x; ({ a: 1 }).entries()
x; ({ a: 1 }).entries()
x; <Hello />
x; `string`
x; (x, y) => x

// doesn't have to be preceded by a semicolon

class X {} [1, 2, 3].forEach(fn)


// don't semicolon if it doesn't start statement

if (true) (() => {})()


// check indentation

if (true) {
  x; (() => {})()
}

// check statement clauses

do break; while (false)
if (true) do break; while (false)

if (true) 1; else 2
for (;;) ;
for (x of y) ;

debugger

// check that it doesn't break non-ASI

1
- 1

1
+ 1

1
/ 1

arr
[0]

fn
(x)

!1

1
< 1

tag
`string`

x; x => x

x; (a || b).c++

x; ++(a || b).c

while (false)
  (function(){}())

aReallyLongLine012345678901234567890123456789012345678901234567890123456789 *
  (b + c)

```


# Prettier differences

```diff
--- Prettier
+++ Rome
@@ -17,9 +17,9 @@
 x;
 (() => {})();
 x;
-({ a: 1 }.entries());
+({ a: 1 }).entries();
 x;
-({ a: 1 }.entries());
+({ a: 1 }).entries();
 x;
 <Hello />;
 x;
```

# Output

```js
// with preexisting semi

x;
[1, 2, 3].forEach(fn);
x;
[a, b, ...c] = [1, 2];
x;
/r/i.test("r");
x;
+1;
x;
-1;
x;
("h" + "i").repeat(10);
x;
1, 2;
x;
(() => {})();
x;
({ a: 1 }).entries();
x;
({ a: 1 }).entries();
x;
<Hello />;
x;
`string`;
x;
(x, y) => x;

// doesn't have to be preceded by a semicolon

class X {}
[1, 2, 3].forEach(fn);

// don't semicolon if it doesn't start statement

if (true) (() => {})();

// check indentation

if (true) {
  x;
  (() => {})();
}

// check statement clauses

do break;
while (false);
if (true)
  do break;
  while (false);

if (true) 1;
else 2;
for (;;);
for (x of y);

debugger;

// check that it doesn't break non-ASI

1 - 1;

1 + 1;

1 / 1;

arr[0];

fn(x);

!1;

1 < 1;

tag`string`;

x;
(x) => x;

x;
(a || b).c++;

x;
++(a || b).c;

while (false) (function () {})();

aReallyLongLine012345678901234567890123456789012345678901234567890123456789 *
  (b + c);
```