使用 isDevMode 的 Angular AOT 给出错误

Question

当使用 isDevMode() 时，JIT 构建工作正常，而 AOT 声明失败

Error: Error encountered resolving symbol values statically. Calling function 'isDevMode', function calls are not supported. Consider replacing the function or lambda with a reference to an exported function

尝试创建这样的导出函数，但没有成功

export function isDevModeEnabled() {
   return isDevMode();
}

Answer 1

所以我也遇到了这个错误，并提出了一个问题here . Angular 2 开发团队的官方回应是这不是一个错误:

I believe this is an intended behaviour. The solution is to move isDevMode() out of the annotation. (By defining to a variable)

官方的解决方案是:

[...] You will need to set the return value to a variable, and use the variable rather than calling the function when wiring up the NgModule.