JavaScript获取构造函数未定义
这是我的代码:JavaScript获取构造函数未定义,javascript,namespaces,Javascript,Namespaces,这是我的代码: window.myApp= window.myApp|| {}; myApp.jira = (function () { var getId = function () { return ...; } var init = function() { var id = myApp.jira.getId(); } })(); $(document).ready(function () { myApp.jira.init(); /
window.myApp= window.myApp|| {};
myApp.jira = (function () {
var getId = function () {
return ...;
}
var init = function() {
var id = myApp.jira.getId();
}
})();
$(document).ready(function () {
myApp.jira.init(); // here jira is null and getting undefined
});
加载页面时,会显示jira未定义。尝试以下操作:
window.myApp= window.myApp|| {};
// Function here is being immediately invoked. No "return" statement
// in your code is equivalent to "return undefined;".
myApp.jira = (function () {
var getId = function () {
return ...;
}
var init = function() {
var id = myApp.jira.getId();
// Bonus note: you can simplify this:
// var id = getId();
}
// If we return an object with functions we want
// to expose (to be public), it'll work,
return {
init: init,
getId: getId
};
})(); // <-- here you'll invoking this function, so you need return.
$(document).ready(function () {
// Without 'return' above, myApp.jira evaluated to undefined.
myApp.jira.init();
});
window.myApp=window.myApp |{};
//正在立即调用此处的函数。没有“返回”语句
//在您的代码中相当于“returnundefined;”。
myApp.jira=(函数(){
var getId=函数(){
返回。。。;
}
var init=函数(){
var id=myApp.jira.getId();
//注意:您可以简化此操作:
//var id=getId();
}
//如果我们返回一个包含所需函数的对象
//揭露(公开)会有用的,
返回{
init:init,
getId:getId
};
})(); //
或者您可以使用对象文字模式:
var myApp = {};
myApp.jira = {
getId: function () {
return ...;
},
init: function() {
var id = this.getId();
}
};
将return init
添加到function@bhb-返回init代码>不会完全修复它。以后需要不同的语法:myApp.jira()
。或者,在我的回答中:返回{init:init}
,其余部分与原始代码相同。