js怎么替换html标签

app.filter('qxhtml', function () {

        return function (text) {

            var reg = /<[^<>]+>/g;

            text = text.replace(reg, '');

            text = text.replace(/ /ig, '');

            if (text.length > 50) {

                text = text.substring(0, 50) + "...";

            }

            return text;

        };

    });