推送

WXL

3 天以前 3bd962a6d7f61239c020e2dbbeb7341e5b842dd1

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
/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Natsu @xiaoxiaojx
*/
 
"use strict";
 
const RuntimeGlobals = require("../RuntimeGlobals");
const RuntimeModule = require("../RuntimeModule");
const Template = require("../Template");
 
/** @typedef {import("../Chunk")} Chunk */
 
class CssMergeStyleSheetsRuntimeModule extends RuntimeModule {
    constructor() {
        super("css merge stylesheets");
    }
 
    /**
     * Generates runtime code for this runtime module.
     * @returns {string | null} runtime code
     */
    generate() {
        const { runtimeTemplate } = /** @type {import("../Compilation")} */ (
            this.compilation
        );
 
        return Template.asString([
            `${RuntimeGlobals.cssMergeStyleSheets} = ${runtimeTemplate.basicFunction(
                "sheets",
                [
                    "var sheetsArray = Array.isArray(sheets) ? sheets : [sheets];",
                    "var cssTexts = [];",
                    "for (var i = 0; i < sheetsArray.length; i++) {",
                    Template.indent([
                        "var s = sheetsArray[i];",
                        "if (!s) continue;",
                        "if (typeof s === 'string') {",
                        Template.indent("cssTexts.push(s);"),
                        "} else if (s.cssRules) {",
                        Template.indent([
                            "var rules = s.cssRules;",
                            "for (var j = 0; j < rules.length; j++) {",
                            Template.indent("cssTexts.push(rules[j].cssText);"),
                            "}"
                        ]),
                        "}"
                    ]),
                    "}",
                    "return cssTexts.join('');"
                ]
            )};`
        ]);
    }
}
 
module.exports = CssMergeStyleSheetsRuntimeModule;