init

马宇豪

2024-07-16 f591c27b57e2418c9495bc02ae8cfff84d35bc18

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
 
"use strict";
 
const RuntimeGlobals = require("../RuntimeGlobals");
const RuntimeModule = require("../RuntimeModule");
const Template = require("../Template");
 
class StartupChunkDependenciesRuntimeModule extends RuntimeModule {
    /**
     * @param {boolean} asyncChunkLoading use async chunk loading
     */
    constructor(asyncChunkLoading) {
        super("startup chunk dependencies", RuntimeModule.STAGE_TRIGGER);
        this.asyncChunkLoading = asyncChunkLoading;
    }
 
    /**
     * @returns {string} runtime code
     */
    generate() {
        const { chunkGraph, chunk, compilation } = this;
        const { runtimeTemplate } = compilation;
        const chunkIds = Array.from(
            chunkGraph.getChunkEntryDependentChunksIterable(chunk)
        ).map(chunk => {
            return chunk.id;
        });
        return Template.asString([
            `var next = ${RuntimeGlobals.startup};`,
            `${RuntimeGlobals.startup} = ${runtimeTemplate.basicFunction(
                "",
                !this.asyncChunkLoading
                    ? chunkIds
                            .map(
                                id => `${RuntimeGlobals.ensureChunk}(${JSON.stringify(id)});`
                            )
                            .concat("return next();")
                    : chunkIds.length === 1
                    ? `return ${RuntimeGlobals.ensureChunk}(${JSON.stringify(
                            chunkIds[0]
                      )}).then(next);`
                    : chunkIds.length > 2
                    ? [
                            // using map is shorter for 3 or more chunks
                            `return Promise.all(${JSON.stringify(chunkIds)}.map(${
                                RuntimeGlobals.ensureChunk
                            }, ${RuntimeGlobals.require})).then(next);`
                      ]
                    : [
                            // calling ensureChunk directly is shorter for 0 - 2 chunks
                            "return Promise.all([",
                            Template.indent(
                                chunkIds
                                    .map(
                                        id => `${RuntimeGlobals.ensureChunk}(${JSON.stringify(id)})`
                                    )
                                    .join(",\n")
                            ),
                            "]).then(next);"
                      ]
            )};`
        ]);
    }
}
 
module.exports = StartupChunkDependenciesRuntimeModule;