jquery - use a variable outside the function

Question

How I Can use a variable outside the function where it was declared?

$(function() {
    function init() {
        var bwr_w = $(window).width();
    }
    in         


        

Answer 1

If you declare the variable outside the function, then assign a value to it inside the function, it should be accessible elsewhere. So long as you're sure that a value will be assigned. If you're not sure, you might want to assign a default value:

$(function() {

        var bwr_w; // or 'var bwr_w = default_value;'

    function init() {
        bwr_w = $(window).width();
    }
    init();
    $('#button').click(function() {
        alert('The Browser Height is' + bwr_w);
    });
});