
const Declaration = require('../declaration');

class OverscrollBehavior extends Declaration {

    static names = ['overscroll-behavior', 'scroll-chaining'];

    /**
     * Change property name for IE
     */
    prefixed(prop, prefix) {
        return prefix + 'scroll-chaining';
    }

    /**
     * Return property name by spec
     */
    normalize() {
        return 'overscroll-behavior';
    }

    /**
     * Change value for IE
     */
    set(decl, prefix) {
        if (decl.value === 'auto') {
            decl.value = 'chained';
        } else if (decl.value === 'none' || decl.value === 'contain') {
            decl.value = 'none';
        }
        return super.set(decl, prefix);
    }

}

module.exports = OverscrollBehavior;
