@angular/build
Version:
Official build system for Angular
57 lines • 2.93 kB
JavaScript
;
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.dev/license
*/
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getSupportedBrowsers = getSupportedBrowsers;
const browserslist_1 = __importDefault(require("browserslist"));
// The below is replaced by bazel `npm_package`.
const BASELINE_DATE = '2025-10-20';
function getSupportedBrowsers(projectRoot, logger) {
// Read the browserslist configuration containing Angular's browser support policy.
const angularBrowserslist = (0, browserslist_1.default)(`baseline widely available on ${getBaselineDate()}`);
// Use Angular's configuration as the default.
browserslist_1.default.defaults = angularBrowserslist;
// Get the minimum set of browser versions supported by Angular.
const minimumBrowsers = new Set(angularBrowserslist);
// Get browsers from config or default.
const browsersFromConfigOrDefault = new Set((0, browserslist_1.default)(undefined, { path: projectRoot }));
// Get browsers that support ES6 modules.
const browsersThatSupportEs6 = new Set((0, browserslist_1.default)('supports es6-module'));
const nonEs6Browsers = [];
const unsupportedBrowsers = [];
for (const browser of browsersFromConfigOrDefault) {
if (!browsersThatSupportEs6.has(browser)) {
// Any browser which does not support ES6 is explicitly ignored, as Angular will not build successfully.
browsersFromConfigOrDefault.delete(browser);
nonEs6Browsers.push(browser);
}
else if (!minimumBrowsers.has(browser)) {
// Any other unsupported browser we will attempt to use, but provide no support for.
unsupportedBrowsers.push(browser);
}
}
if (nonEs6Browsers.length) {
logger.warn(`One or more browsers which are configured in the project's Browserslist configuration ` +
'will be ignored as ES5 output is not supported by the Angular CLI.\n' +
`Ignored browsers:\n${nonEs6Browsers.join(', ')}`);
}
if (unsupportedBrowsers.length) {
logger.warn(`One or more browsers which are configured in the project's Browserslist configuration ` +
"fall outside Angular's browser support for this version.\n" +
`Unsupported browsers:\n${unsupportedBrowsers.join(', ')}`);
}
return Array.from(browsersFromConfigOrDefault);
}
function getBaselineDate() {
// Unlike `npm_package`, `ts_project` which is used to run unit tests does not support substitutions.
return BASELINE_DATE[0] === 'B' ? '2025-01-01' : BASELINE_DATE;
}
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