---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: valid.js
---
# Input
```jsx
/* should not generate diagnostics */

a += 1;
a -= 1;
a *= 1;
a /= 1;
a %= 1;
a <<= 1;
a >>= 1;
a >>>= 1;
a &= 1;
a ^= 1;
a |= 1;
a **= 1;
this.a += 1;
x[0] -= x[0]
window.a += window.a;

```