lit-analyzer
Version:
CLI that type checks bindings in lit-html templates
40 lines (39 loc) • 1.69 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.isCustomElementTagName = exports.isValidCustomElementName = exports.isValidAttributeName = void 0;
/**
* According to {@link https://html.spec.whatwg.org/multipage/syntax.html#attributes-2}, the following Unicode characters are illegal in an attribute name
* @type {RegExp}
*/
var ILLEGAL_UNICODE_CHARACTERS = /[\u0020\u0022\u0027\u003E\u002F\u003D]/g;
/**
* According to {@link https://infra.spec.whatwg.org/#noncharacter},
* a noncharacter is a codepoint that matches any of the given unicode characters
* @type {RegExp}
*/
var NONCHARACTERS = /[\uFFFF\uFFFE\uFDD1\uFDD2\uFDD3\uFDD4\uFDD5\uFDD6\uFDD7\uFDD8\uFDD9\uFDDA\uFDDB\uFDDC\uFDDD\uFDDE\uFDDF\uFDE0\uFDE1\uFDE2\uFDE3\uFDE4\uFDE5\uFDE6\uFDE7\uFDE8\uFDE9\uFDEA\uFDEB\uFDEC\uFDED\uFDEE\uFDEF]/g;
function hasOnlyValidCharacters(name) {
return name.match(ILLEGAL_UNICODE_CHARACTERS) == null && name.match(NONCHARACTERS) == null;
}
/**
* Returns true if the given input is a valid attribute name
* @param {string} input
* @return {boolean}
*/
function isValidAttributeName(input) {
return hasOnlyValidCharacters(input);
}
exports.isValidAttributeName = isValidAttributeName;
/**
* Returns true if the given input is a valid custom element name.
* @param {string} input
* @return {boolean}
*/
function isValidCustomElementName(input) {
return input.includes("-") && input.toLowerCase() === input && hasOnlyValidCharacters(input);
}
exports.isValidCustomElementName = isValidCustomElementName;
function isCustomElementTagName(tagName) {
return tagName.includes("-");
}
exports.isCustomElementTagName = isCustomElementTagName;