static checkVisualName()

in lib/VisualGenerator.js [303:328]

• 23 lines of code
• 8 McCabe index (conditional complexity)

    static checkVisualName(name) {
        const regexES3ReservedWord = /^(?:do|if|in|for|int|new|try|var|byte|case|char|else|enum|goto|long|null|this|true|void|with|break|catch|class|const|false|final|float|short|super|throw|while|delete|double|export|import|native|public|return|static|switch|throws|typeof|boolean|default|extends|finally|package|private|abstract|continue|debugger|function|volatile|interface|protected|transient|implements|instanceof|synchronized)$/;
        const regexNumber = /^(?![+-])([0-9\+\-\.]+)/; // eslint-disable-line no-useless-escape
        const regexZeroWidth = /\u200c|\u200d/;
        const regexpWrongSymbols = /^[a-zA-Z0-9]+$/;
        const valueAsUnescapedString = name.replace(/\\u([a-fA-F0-9]{4})|\\u\{([0-9a-fA-F]{1,})\}/g, ($0, $1, $2) => {
            const codePoint = parseInt($2 || $1, 16);
            // If it’s a surrogate…
            if (codePoint >= 0xD800 && codePoint <= 0xDFFF) {
                // Return a character that is never valid in an identifier.
                // This prevents the surrogate from pairing with another.
                return '\0';
            }
            return String.fromCodePoint(codePoint);
        });
        if (regexNumber.test(name)) {
            return `The visual name can't begin with a number digit`;
        } else if (!regexpWrongSymbols.test(name)) {
            return `The visual name can contain only letters and numbers`;
        } else if (regexES3ReservedWord.test(valueAsUnescapedString)) {
            return `The visual name cannot be equal to a reserved JavaScript keyword.
                More information: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#Keywords`;
        } else if (regexZeroWidth.test(valueAsUnescapedString)) {
            return `The visual name can't be empty`;
        }
    }