first commit

历届学生/font-end-nine/项目练习/学生项目/冯文焌/6ajax/菜谱/utils.js

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+class Util {
+
+    inject() {
+        Element.prototype.remove = function (removeClassName) {
+            this.classList.remove(removeClassName);
+        }
+        Element.prototype.add = function (addClassName) {
+            this.classList.add(addClassName);
+        }
+        HTMLElement.prototype.text = function (text) {
+            this.innerText = text;
+        }
+    }
+
+    query(name) {
+        var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
+        var r = window.location.search.substr(1).match(reg);
+        if (r != null) return unescape(r[2]); return null;
+    }
+
+    click(className, callback) {
+        $(className).onclick = (e) => {
+            callback(e)
+        }
+    }
+
+    $(className) {
+        return document.querySelector(className)
+    }
+
+    _(className) {
+        return document.querySelectorAll(className)
+    }
+}
+
+var { $, _, click, inject, query } = new Util()
+
+inject()