Drop
The drop instruction, pops a value from the stack, and discards it.
Try it
(module
(import "console" "log" (func $log (param i32)))
(func $main
;; load two values onto the stack
i32.const 10
i32.const 20
;; drop the top item from the stack (`20`)
drop
call $log ;; log the top value on the stack (`10`)
)
(start $main)
)
const url = "{%wasm-url%}";
await WebAssembly.instantiateStreaming(fetch(url), { console });
Syntax
wat
;; push multiple values onto the stack
i32.const 1
i32.const 2
i32.const 3
;; drop the top item from the stack (`3`)
drop
;; the top item on the stack will now be `2`
| Instruction | Binary opcode |
|---|---|
drop |
0x1a |