@tbela99/css-parser/dist/lib/validation/at-rules/keyframes.js

CSS parser for node and the browser

import { SyntaxValidationResult, EnumToken } from '../../ast/types.js';
import '../../ast/minify.js';
import '../../ast/walk.js';
import '../../parser/parse.js';
import '../../parser/tokenize.js';
import '../../parser/utils/config.js';
import '../../syntax/color/utils/constants.js';
import '../../renderer/sourcemap/lib/encode.js';
import { consumeWhitespace } from '../utils/whitespace.js';

function validateAtRuleKeyframes(atRule, options, root) {
    if (!Array.isArray(atRule.tokens) || atRule.tokens.length == 0) {
        // @ts-ignore
        return {
            valid: SyntaxValidationResult.Drop,
            context: [],
            node: atRule,
            syntax: '@keyframes',
            error: 'expecting at-rule prelude'
        };
    }
    const tokens = atRule.tokens.filter((t) => t.typ != EnumToken.CommentTokenType).slice();
    consumeWhitespace(tokens);
    // if (tokens.length == 0) {
    //
    //     // @ts-ignore
    //     return {
    //         valid: SyntaxValidationResult.Drop,
    //         context: [],
    //         node: atRule,
    //         syntax: '@keyframes',
    //         error: 'expecting at-rule prelude'
    //     } as ValidationSyntaxResult;
    // }
    if (tokens.length == 0 || ![EnumToken.StringTokenType, EnumToken.IdenTokenType].includes(tokens[0].typ)) {
        // @ts-ignore
        return {
            valid: SyntaxValidationResult.Drop,
            context: [],
            node: atRule,
            syntax: '@keyframes',
            error: 'expecting ident or string token'
        };
    }
    tokens.shift();
    consumeWhitespace(tokens);
    if (tokens.length > 0) {
        // @ts-ignore
        return {
            valid: SyntaxValidationResult.Drop,
            context: [],
            node: tokens[0],
            syntax: '@keyframes',
            error: 'unexpected token'
        };
    }
    // @ts-ignore
    return {
        valid: SyntaxValidationResult.Valid,
        context: [],
        node: atRule,
        syntax: '@keyframes',
        error: ''
    };
}

export { validateAtRuleKeyframes };