无法识别的导入路径 "syscall/js"

Question

我正在尝试使用 webassembly 但我不能运行这个

import (
    "syscall/js"
)

或

GOARCH=wasm GOOS=js go get -u github.com/siongui/godom/wasm

安装 wasm

它抛出一个错误

cannot find package "syscall/js" in any of:

我使用的是go版本go1.6.2linux

Answer 1

Go 1.11 Release Notes (August 2018)

WebAssembly

Go programs can call into JavaScript using the new experimental syscall/js package.

syscall/js 首次在 Go1.11（2018 年 8 月）中引入。命令 go version 的输出是 go1.6.2 l，一个古老的（2016 年 2 月）和过时的版本。

从 Go Downloads, please follow the installation instructions, including the instructions for Uninstalling Go 下载适合您系统的 Go1.11 或更高版本的二进制版本后，适用于您当前的 Go 版本。

Answer 2

Go1.12 在 syscall/js

中有一些重大变化

The Callback type and NewCallback function have been renamed; they are now called Func and FuncOf, respectively. This is a breaking change, but WebAssembly support is still experimental and not yet subject to the Go 1 compatibility promise. Any code using the old names will need to be updated.

If a type implements the new Wrapper interface, ValueOf will use it to return the JavaScript value for that type.

The meaning of the zero Value has changed. It now represents the JavaScript undefined value instead of the number zero. This is a breaking change, but WebAssembly support is still experimental and not yet subject to the Go 1 compatibility promise. Any code relying on the zero Value to mean the number zero will need to be updated.

The new Value.Truthy method reports the JavaScript "truthiness" of a given value.

这里有一个 link 的示例，使用 React、Node 和 Go 来获得更清晰的理解。

https://github.com/phmatray/webassembly-demo

无法识别的导入路径 "syscall/js"

unrecognized import path "syscall/js"

import

go

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