Function lineAt

docs/components/editor.js:53–58

(text, caret)

    };

    const lineAt = (text, caret) => {
        const start = text.lastIndexOf('\n', caret - 1) + 1;
        const nl = text.indexOf('\n', caret);
        const end = nl === -1 ? text.length : nl;
        return { start, end, body: text.slice(start, end), col: caret - start };
    };
    const firstNonWS = (s) => { for (let i = 0; i < s.length; i++) if (!WS.test(s[i])) return i; return s.length; };
    
    // `prevIndentTabStop`, distance to the previous tab stop from `col`.