missing import in watch mode

[taoqf]

TypeScript Version: 2.8.0-dev.20180130

Search Terms:

Code

// A *self-contained* demonstration of the problem follows...
// Test this by running `tsc` on the command-line, rather than through another build tool such as Gulp, Webpack, etc.
import a from 'a';
import b from 'b';

a();
b();
// ...

Expected behavior:

(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports", "a", "b"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    const a = require('a');
    const b = require('b');

    a();
    b();
    // ...
});

Actual behavior:

(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    a();
    b();
    // ...
});

Playground Link:

Related Issues:
I find in watch mode, dependencies will missing, but it is fine not in watch mode, only in watch mode. I tried to write a test but I find simple test is fine even in watch mode.

I also tried latest version, it is fine in watch mode, too.

Anyone meet same issue?

[taoqf]

the test code just is a simple demo, cause i really could not write it. just because new issue requires that.

[mhegazy]

I am unable to reproduce this locally with just this file.. can you share more context.

[sheetalkamat]

The more info helpful in investigating this would be what are the contents of modules a and b are.. What are the compiler options you are using and which edit is causing the incorrect input or is it any kind of edit that results in incorrect output. Also it would be helpful if you run your program with --listFiles and --listEmittedFiles with and without --watch option to diagnose if some files are being missed in the program with --watch..

[mhegazy]

still do not get a repro for this file. can you share a sample project? we would be happy to receive it by email if you would rather not share it on github. also we would be open to signing an NDA to get access to the project.

[kpping]

Hi, I am also find this strange behavior which I cannot reproduce. It may happen sometimes in --watch mode after update to 2.7.1

[sheetalkamat]

i think this might be fixed by #21524

[taoqf]

@sheetalkamat Yes, it's ok now.