七、JS 推薦寫(xiě)法

 // 正確的書(shū)寫(xiě)
 if (true) {
     alert(name);
 }
 console.log(name);
 // 不推薦的書(shū)寫(xiě)
 if (true)
     alert(name);
 console.log(name);
 // 不推薦的書(shū)寫(xiě)
 if (true)
 alert(name);
 console.log(name)

 // 沒(méi)有換行，小的代碼段無(wú)法區(qū)分
 if (wl && wl.length) {
     for (i = 0, l = wl.length; i < l; ++i) {
         p = wl[i];
         type = Y.Lang.type(r[p]);
         if (s.hasOwnProperty(p)) {
             if (merge && type == 'object') {
                 Y.mix(r[p], s[p]);
             } else if (ov || !(p in r)) {
                 r[p] = s[p];
             }
         }
     }
 }
 // 有了換行，邏輯清楚多了
 if (wl && wl.length) {

     for (i = 0, l = wl.length; i < l; ++i) {
         p = wl[i];
         type = Y.Lang.type(r[p]);

         if (s.hasOwnProperty(p)) {
             // 處理merge邏輯
             if (merge && type == 'object') {
                 Y.mix(r[p], s[p]);
             } else if (ov || !(p in r)) {
                 r[p] = s[p];
             }
         }
     }
 }
換行可以是空行，也可以是注釋

// 類的實(shí)現(xiàn)
 function Person(name) {
     this.name = name;
 }

 Person.prototype.sayName = function() {
     alert(this.name);
 };

 var me = new Person("Nicholas");

 // 將this放到局部變量self
 function Persion(name, sex) {
     var self = this;

     self.name = name;
     self.sex = sex; 
 }

function A(){
    //...
}
function B(){
    //...
}
B.prototype = new A(); 
B.prototype.constructor = B; //原則上，記得把這句話加上

// 緩存對(duì)象
var getComment = function() {
    var dom = $("#common-container"),               // 緩存dom
                appendTo = $.appendTo,                      // 緩存全局變量
        data = this.json.data;                      // 緩存作用域鏈較深的對(duì)象
}


//當(dāng)需要緩存this時(shí)必須使用self變量進(jìn)行緩存
// 緩存this
function Row(name) {
    var self = this;

    self.name = name;
    $(".row").click(function() {
        self.getName();
    }); 
}