我正在尝试确定声明javascript“class”使用的辅助函数的最佳实践。例如:
方法#1:
// closure issues?
function helper(param) {
return compute(param);
}
function HeavilyInstantiated() {}
HeavilyInstantiated.prototype.computeHard = function(params) {
var someResult = helper(params.prop1);
return someResult;
}
方法#2:
function HeavilyInstantiated() {}
// still, only one instance for all objects instantiated?
HeavilyInstantiated.prototype.helper = function(param) {
return compute(param);
}
HeavilyInstantiated.prototype.computeHard = function(params) {
var someResult = this.helper(params.prop1);
return someResult;
}
答案 0 :(得分:4)
我更喜欢方法3,将其声明为构造函数的属性:
function HeavilyInstantiated() {}
HeavilyInstantiated.helper = function(param) {
return compute(param);
}
HeavilyInstantiated.prototype.computeHard = function(params) {
var someResult = HeavilyInstantiated.helper(params.prop1);
return someResult;
}
您仍然只有一个辅助方法实例,但它不会污染全局命名空间或HeavilyInstantiated的实例(它不在其原型链上)。