我试图通过在我的脚本中使用命名空间来定位一个jquery选择器
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Selectors</title>
</head>
<body>
<ul>
<li class="test">First</li>
<li>Second</li>
<li>Third</li>
</ul>
<!--<script>
$('document').ready(function(){
$('li.test').css('color','green')
})
</script>-->
<script src="http://code.jquery.com/jquery-1.10.2.min.js"></script>
<script>
var customModule = (function () {
var MyUtility = {
Selectors: {
ColorCss: function () {
var myBorder = function () {
$('li').css('color', 'red')
console.log('hello')
}
return{
myBorder: myBorder
}
}()
}
}
}())
</script>
</body>
</html>
答案 0 :(得分:1)
正如你所说It works if i try by adding a breakpoint on the last line and than use devtools to access MyUtility.Selectors.ColorCss.myBorder()
这是你的代码:
var customModule = (function () {
var MyUtility = {
Selectors: {
ColorCss: function(){
var myBorder = function(){
$('li').css('color', 'red');
console.log('hello');
}
return{ myBorder: myBorder }
}()
} // Selectors
} // MyUtility
}())
上面的代码可以写成:
function myBorderFunc() { $('li').css('color', 'red'); console.log('hello');}
var selectorObj = { ColorCss : function(){ return{ myBorder: myBorderFunc } }()};
var MyUtility = { Selectors: selectorObj};
var customModule = ( function(){ MyUtility }() );
这显示了问题
var customModule
是一个函数表达式,不返回任何内容,因此undefined
customModule
未定义,因此无法使用customModule.MyUtility MyUtility.Selectors.ColorCss.myBorder()
,因为MyUtility
是一个具有财产Selectors
的对象,依此类推你可以用这个例子来测试它:
// undefined since nothing is returned
var bar = (function(){ {Foo: "i am foo"} }());
// returns foo and can be used bar.Foo ---> "i am foo"
var bar = (function(){ return {Foo: "i am foo"} }());
要“修复代码”,请返回MyUtility
var customModule = (function () {
var MyUtility = {
Selectors: {
ColorCss: function(){
var myBorder = function(){
$('li').css('color', 'red');
console.log('hello');
}
return{ myBorder: myBorder }
}()
} // Selectors
} // MyUtility
return MyUtility;
}())
这样您可以像customModule.Selectors.ColorCss.myBorder()
一样访问它。