ball.bemtree.js

block('ball')(
    def()(function () {
        var myFunc = function () {
            console.log('common function');
        };
        
        return applyNext({ _myFunc: myFunc });
    }),
    
    content()(function () {
        return {
            elem: 'el1',
            content: apply('ball-el1')
        };
    }),
    
    mode('ball-el1')(function () {
        var result = this._myFunc();
        
        return result;
    })
);