How to detect browser type and its version

Question

how can i detect browser type and its version in Rails. I want to put check on the version of specific browser and if its not required browser version than ask user to upgrade i

Answer 1

Though this is a frontend solution, I prefer to check for a specific feature that is required, such as flexbox. You can use something like Modernizr, or just a simple JavaScript check will do (https://stackoverflow.com/a/27047981/179311).

if(!("flexWrap" in document.documentElement.style)) {
    // IE 10, Chrome 20 and Firefox 27 and anything older will hit this.
    alert('your browser is out of date');
    // maybe this is preferred
    // window.location = '/browser-unsupported'
}