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Memory

var myMemory = new WebAssembly.Memory(memoryDescriptor);

memoryDescriptor

initial: WebAssembly WebAssembly
maximum: WebAssembly WebAssembly WebAssembly

A WebAssembly 65,536 64KB

memoryDescriptor TypeError
maximum initial RangeError

`Memory`

Memory Memory() Memory

Memory.prototype.constructor: WebAssembly.Memory()
Memory.prototype.buffer

Memory.prototype.grow(): WebAssembly 64KB

WebAssembly.Memory JavaScript WebAssembly 10 640KB 100 6.4MB

var memory = new WebAssembly.Memory({ initial: 10, maximum: 100 });

WebAssembly.Memory WebAssembly GitHub memory.html WebAssembly.instantiateStreaming() memory.wasm

WebAssembly.instantiateStreaming(fetch("memory.wasm"), {
  js: { mem: memory },
}).then((obj) => {
  var i32 = new Uint32Array(memory.buffer);
  for (var i = 0; i < 10; i++) {
    i32[i] = i;
  }
  var sum = obj.instance.exports.accumulate(0, 10);
  console.log(sum);
});


WebAssembly JavaScript Interface # memories
Unknown specification

WebAssembly.Memory()

`Memory`

webassembly.api.Memory

webassembly.multiMemory

MDN