nop stands for no-operation. It literally does nothing.

(module
  (func (export "do_nothing")
    nop
  )
)

const url = "{%wasm-url%}";
await WebAssembly.instantiateStreaming(fetch(url)).then((result) => {
  result.instance.exports.do_nothing();
});

Syntax

nop

InstructionBinary opcodenop0x01

Specifications

Browser compatibility