1. Список говнокодов пользователя Koren

    Всего: 1

  2. JavaScript / Говнокод #23526

    0

    1. 01
    2. 02
    3. 03
    4. 04
    5. 05
    6. 06
    7. 07
    8. 08
    9. 09
    10. 10
    11. 11
    12. 12
    13. 13
    14. 14
    15. 15
    16. 16
    17. 17
    18. 18
    19. 19
    20. 20
    21. 21
    22. 22
    23. 23
    24. 24
    25. 25
    26. 26
    27. 27
    28. 28
    29. 29
    30. 30
    31. 31
    32. 32
    33. 33
    34. 34
    35. 35
    36. 36
    37. 37
    38. 38
    39. 39
    40. 40
    41. 41
    42. 42
    43. 43
    44. 44
    45. 45
    46. 46
    47. 47
    48. 48
    49. 49
    50. 50
    51. 51
    52. 52
    53. 53
    /**
 * Queries the DOM for the HTML element based on selector string passed.
 * @param {String} selector Selector we are querying for.
 * @param {String} [parent] Parent is optional, if passed the function will look for a child element of that parent.
 * @param {Boolean} [returnEmptyList] If set to true the function won't throw an error even if the element is not found.
 * @return {Array} HTML objects.
 */
function getEl( selector, parent, returnEmptyList )
{
    var classOnly,
        match,
        elPrefix,
        selPrefix,
        context,
        safeNode,
        nodes;

    classOnly = /^\.([\w\-]+)$/;
    match = classOnly.exec( selector );
    elPrefix = '.js-';
    selPrefix = selector.substring( 0, 4 );

    if ( ( selPrefix !== elPrefix || !typeCheck.isString( selector ) ) && match !== null )
    {
        throw new Error( 'Please make sure you input a valid class name that begins with a proper prefix.' );
    }

    if ( typeCheck.isString( parent ) )
    {
        context = document.getElementsByClassName( parent.substring( 1 ) )[ 0 ];
    }
    else if ( typeCheck.isElement( parent ) )
    {
        context = parent;
    }
    else
    {
        context = document;
    }

    nodes = match === null ? context.querySelectorAll( selector ) : context.getElementsByClassName( match[ 1 ] );

    safeNode = nodes.length > 0 && nodes;

    if ( safeNode || !safeNode && returnEmptyList )
    {
        return [].slice.call( nodes ); //converts it to a proper array.
    }
    else
    {
        throw new Error( 'Element with selector "' + selector + '" does not exist on the page.' );
    }
}

    Koren, 13 Ноября 2017

    Комментарии (0)