"use strict";
/**
 * @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.io/license
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.validateHtmlSelector = exports.htmlSelectorRe = void 0;
const core_1 = require("@angular-devkit/core");
const schematics_1 = require("@angular-devkit/schematics");
// Must start with a letter, and must contain only alphanumeric characters or dashes.
// When adding a dash the segment after the dash must also start with a letter.
exports.htmlSelectorRe = /^[a-zA-Z][.0-9a-zA-Z]*(:?-[a-zA-Z][.0-9a-zA-Z]*)*$/;
function validateHtmlSelector(selector) {
    if (selector && !exports.htmlSelectorRe.test(selector)) {
        throw new schematics_1.SchematicsException(core_1.tags.oneLine `Selector (${selector})
        is invalid.`);
    }
}
exports.validateHtmlSelector = validateHtmlSelector;