first commit

历届学生/front-end-team-11/项目开发/学生项目/贡婉宝/飞机大战/js/PA.JS

@@ -0,0 +1,31 @@
+class publicE{
+    constructor(){
+        
+    }
+
+    $(name){
+        return document.querySelector(name)
+    }
+
+    _(name){
+        return document.querySelectorAll(name)
+    }
+
+    customMethods(){
+        Element.prototype.add=function(name){
+            this.classList.add(name)
+        }
+        Element.prototype.remove=function(name){
+            this.classList.remove(name)
+        }
+        Element.prototype.none = function() {
+            this.style.display = "none"
+        }
+        Element.prototype.show = function() {
+            this.style.display = "block"
+        }
+    }
+}
+
+var {$, _ ,customMethods} =new  publicE
+customMethods()