javascript自执行函数之伪命名空间封装法_javascript技巧

(function() {
//根据id获取对象
function $(id) { return document.getElementById(id); }

//内部函数，在外层是不可以调用的
function _setStyle(id, styleName, styleValue) {
$(id).style[styleName] = styleValue;
}

//创建伪命名空间
window.mySpace = {};

//将内部函数_setStyle封装在mySpace命名空间内
//调用时，使用window.mySpace.setStyle(id, styleName, styleValue)
window.mySpace.setStyle = _setStyle;
})();

//下面是测试代码
window.onload = function() {
//将id为test的对象的文字颜色设置为红色
window.mySpace.setStyle("test", "color", "#f00");
}

window.mySpace = {};
window.mySpace.$ = function(id) { return document.getElementById(id); }
window.mySpace.setStyle = function(id, styleName, styleValue) {
window.mySpace.$("test").style[styleName] = styleValue;
}
//下面是测试代码
window.onload = function() {
window.mySpace.setStyle("test", "backgroundColor", "#f00");
window.mySpace.setStyle("test", "color", "#fff");
}