Not support for Rollup in AOT mode

[miao17game]

I'm submitting a...

[x] Bug report  
[ ] Feature request
[ ] Documentation issue or request
[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Support request => Please do not submit support request here

Current behavior

When i try to rollup for the AOT mode, i find that it's impossible to build with ng-zorro.

the error message is below here:

> ngc -p tsconfig-aot.json && rollup -c rollup-config.js

⚠️   'default' is imported from external module 'rollup' but never used

'default' is not exported by 'node_modules\@angular\common\@angular\common.es5.js'
'default' is not exported by 'node_modules\@angular\core\@angular\core.es5.js'
�   Error: Cannot call a namespace ('moment')
node_modules\ng-zorro-antd\src\release\datepicker\nz-datepicker.component.js (17:26)
15:     this._value = null;
16:     this._today = new Date();
17:     this._selectedMonth = moment(this.nzValue).month();
                              ^
18:     this._selectedYear = moment(this.nzValue).year();
19:     this._selectedDate = moment(this.n

Expected behavior

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

the problem is the 'moment', it's imported in time-picker component in this format:

import * as moment from 'moment'

but it's not support in AOT mode.
if i change the format into

import moment from 'moment'

,no errors will be called up, but still some other errors in moment.
if i remove the NG-ZORRO from my angular4 project, there is nothing wrong.
And there is no problems in JIT mode.

I don't think change the source by myself is a good way to resolve this problem.
I need help.

Environment

Angular version: 4.2.4

ng-zorro-antd version: 0.5.0

Browser:
- [x] Chrome (desktop) version 59
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [ ] IE version XX
 
For Tooling issues:
- Node version: XX  
- Platform: Windows7 

Others:

[miao17game]

well, i have gotten a new way to resolve this problem, the is the plugins section in my rollup-config:

plugins: [
        nodeResolve({ jsnext: true, module: true }),
        commonjs({
            namedExports: {
                'node_modules/cerialize/index.js': ['deserialize', 'serializeAs', 'deserializeAs', 'serialize', 'inheritSerialization'],
                'node_modules/angular2-cookie/core.js': ['CookieOptions', 'CookieService'],
            },
            include: [
                'node_modules/rxjs/**',
                'node_modules/angular2-cookie/**',
                'node_modules/cerialize/**',
                'node_modules/ng-zorro-antd/**',
                'node_modules/moment/**',
            ]
        }),
        {
            name: 'replace moment imports',
            transform: code =>
                ({
                    code: code.replace(/import\s*\*\s*as\s*moment/g, 'import moment'),
                    map: { mappings: '' }
                })
        },
        uglify()
    ]

if not add in commonjs, there will be a new undefined-error throwed in runtime.

[vthinkxie]

angular cli is officially supported, rollup has not been tested yet.
thanks for feedback, we will discuss it later.

[trotyl]

Sounds valid, the current usage is not valid JavaScript code and has been banned in TypeScript (microsoft/TypeScript#2242 (comment)) for a long time, I'm not sure why it could still compile.

[LinboLen]

• don't import default in angular, the tslint have hinted it with error.

import moment from 'moment this is import default which corresponding to export default xxx

• import moment sames that it's a hack style

Updated

correctly default import support by rollup, but not import * as moment from moment.
which tsconfig.json config compilerOptions allowSyntheticDefaultImports: true will resolve issue

Use

import moment from 'moment';
all tsconfig*.json compilerOptions add allowSyntheticDefaultImports: true

Updated Again

no better way to use moment. There is a consensus that use import as moment from 'moment' suit for users, tsc, ngc. and replace import as moment from 'moment' as import moment from 'moment' when using rollup

[trotyl]

@LinboLen There is no definition of how ES module interacts with CommonJS, for native Node.js and earlier version of Babel (by default), the module.exports would be retrieved from import foo from '...', but for TypeScript (by default) and latest version of Babel (by default), the module.exports would be retrieved from import * as foo from '...'.

Moreover, TypeScript has provided allowSyntheticDefaultImports option for type checking to allow default import for namespace implicitly, but must be combined with other bundle tools (like webpack).

Frankly, there is no valid way to import something like moment or express, all of them would be wrong, just some may work and some may not.

[LinboLen]

long time i have not tracking ecmascript import feature.

onething i can confirm. should only use import {foo} from "bar", other like import foo from "bar" import * as foo from "bar" is not recommend

i know node style, but right now should only use import {foo} from "bar"

i know moment, really heart me ever.(i use import * as moment from "moment", later i dropped it)

ref
moment conflict

[miao17game]

the problem is there are functions and namespace in this library with the same declare name 'moment', and the rollup can not the difference.

�   Error: Cannot call a namespace ('moment')

in fact, the 'moment' to be used is a function ,not a namespace... but it seems that rollup don't know it

[trotyl]

Whatever import by as must be a namespace, that's the semantics of JavaScript language, and CommonJS module.exports has no equivalence in ES module. Rollup did nothing wrong for following the standard as an ES module bundler.

[miao17game]

but we need a solution here, or the experience in AOT and rollup won't be improved.

[miao17game]

my opinion is whether a hack or reconstruction in source code of ng-zorro isfeasible, but not the most important.
the first work to do is make the ng-zorro usable in AOT/rollup mode cause this mode is better than any other ways for the production.

thst's my hack way ,though it' not elegant, and i prefer an official solution if possible.

[trotyl]

The best way to do is to make moment a global requirement like a polyfill instead of a module dependency, as it's not tree-shakable at all.

[wilsoncook]

Even i tried pass through the rollup compiling with success, the generated build.js file executed with errors that can't resolve. We recommend using angular-cli's tree-shaking functionality because these functions update too quickly.

[trotyl]

Will be solved by #240.

[lock]

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