javascript - 使 var 值在按钮单击中可用

Question

如何在稍后的按钮单击事件中获取 var mydomain = CollectionDomains[i].email_domain 中的域值

$(document).ready(function() {
$('#email_address').blur(function(){

        var emailAddress = $('#email_address').val().split('@');
        var domain = emailAddress[1];
        var tagMap = {};
           var i = null;
        for (i = 0; collectedDomains.length > i; i += 1) {
            var mydomain = collectedDomains[i].email_domain;               
        }

        var hasTag = function(tagName) {
            return tagMap[tagName];
        };  

    $('#Button1').click(function(){
        //need the value of var mydomain available here
    });
});

Answer 1

这是一个范围问题。您只需在引用它的两个函数之外定义要使用的变量即可。像这样:

$(document).ready(function() {
    var mydomain = null;

    $('#email_address').blur(function(){

        var emailAddress = $('#email_address').val().split('@');
        var domain = emailAddress[1];
        var tagMap = {};
        var i = null;

        for (i = 0; collectedDomains.length > i; i += 1) {
            mydomain = collectedDomains[i].email_domain;               
        }

        var hasTag = function(tagName) {
            return tagMap[tagName];
        };  
    });

    $('#Button1').click(function(){
        //mydomain equals whatever you set it to in the .blur call
    });
});