@meta2d/core/src/utils/padding.js

@meta2d/core: Powerful, Beautiful, Simple, Open - Web-Based 2D At Its Best .

/**
 * turn padding into [top, right, bottom, left]
 * @param  {Number|Array} padding input padding
 * @return {array} output
 */
export const formatPadding = (padding) => {
    let top = 0;
    let left = 0;
    let right = 0;
    let bottom = 0;
    if (typeof padding === 'number') {
        top = left = right = bottom = padding;
    }
    else if (typeof padding === 'string') {
        const intPadding = parseInt(padding, 10);
        top = left = right = bottom = intPadding;
    }
    else if (Array.isArray(padding)) {
        top = padding[0];
        right = !isNil(padding[1]) ? padding[1] : padding[0];
        bottom = !isNil(padding[2]) ? padding[2] : padding[0];
        left = !isNil(padding[3]) ? padding[3] : right;
    }
    return [top, right, bottom, left];
};
/**
 * Checks if `value` is `null` or `undefined`.
 *
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
 * @example
 *
 * isNil(null)
 * // => true
 *
 * isNil(void 0)
 * // => true
 *
 * isNil(NaN)
 * // => false
 */
function isNil(value) {
    return value == null;
}
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