javascript - 如何从jquery函数返回变量

Question

你能帮帮我吗... 如何从jquery函数返回变量

var height = $(window).height();

$(window).resize(function(){
    var height = $(window).height();
    return height;
});

setInterval(function() {
    $('div').append( 'Index: ' +  height );
}, 500);

Answer 1

你不需要回来。试试这个:

var height = $(window).height(); // define "height" here

$(window).resize(function(){
    height = $(window).height(); // update "height" variable, 
                                 // don't user "var" here.
                                 // because using "var" will redefine
                                 // "height" again and no longer contain the
                                 // updated value on window resize 
                                 // out of this resize function scope
});

setInterval(function() {
    $('div').append( 'Index: ' +  height );
}, 500);