Chore: replace includes with indexOf

packages/cascader/src/menu.vue

@@ -186,7 +186,7 @@
             // keydown up/down/left/right/enter
             events.on.keydown = (ev) => {
               const keyCode = ev.keyCode;
-              if (![37, 38, 39, 40, 13, 9, 27].includes(keyCode)) {
+              if (![37, 38, 39, 40, 13, 9, 27].indexOf(keyCode) > -1) {
                 return;
               }
               const currentEle = ev.target;
@@ -194,7 +194,7 @@
               const menuItemList = parentEle.querySelectorAll("[tabindex='-1']");
               const currentIndex = Array.prototype.indexOf.call(menuItemList, currentEle); // 当前索引
               let nextIndex, nextMenu;
-              if ([38, 40].includes(keyCode)) {
+              if ([38, 40].indexOf(keyCode) > -1) {
                 if (keyCode === 38) { // up键
                   nextIndex = currentIndex !== 0 ? (currentIndex - 1) : currentIndex;
                 } else if (keyCode === 40) { // down

packages/dropdown/src/dropdown.vue

@@ -132,7 +132,7 @@
       },
       handleTriggerKeyDown(ev) {
         const keyCode = ev.keyCode;
-        if ([38, 40].includes(keyCode)) { // up/down
+        if ([38, 40].indexOf(keyCode) > -1) { // up/down
           this.removeTabindex();
           this.resetTabindex(this.menuItems[0]);
           this.menuItems[0].focus();
@@ -140,7 +140,7 @@
           ev.stopPropagation();
         } else if (keyCode === 13) { // space enter选中
           this.handleClick();
-        } else if ([9, 27].includes(keyCode)) { // tab || esc
+        } else if ([9, 27].indexOf(keyCode) > -1) { // tab || esc
           this.hide();
         }
         return;
@@ -151,7 +151,7 @@
         const currentIndex = this.menuItemsArray.indexOf(target);
         const max = this.menuItemsArray.length - 1;
         let nextIndex;
-        if ([38, 40].includes(keyCode)) { // up/down
+        if ([38, 40].indexOf(keyCode) > -1) { // up/down
           if (keyCode === 38) { // up
             nextIndex = currentIndex !== 0 ? currentIndex - 1 : 0;
           } else { // down
@@ -168,7 +168,7 @@
           if (!this.hideOnClick) { // click关闭
             this.visible = false;
           }
-        } else if ([9, 27].includes(keyCode)) { // tab // esc
+        } else if ([9, 27].indexOf(keyCode) > -1) { // tab // esc
           this.hide();
           this.triggerElm.focus();
         }

packages/tree/src/tree.vue

@@ -202,7 +202,7 @@
         this.treeItems = this.$el.querySelectorAll('.is-focusable[role=treeitem]');
         const currentIndex = this.treeItemArray.indexOf(currentItem);
         let nextIndex;
-        if ([38, 40].includes(keyCode)) { // up、down
+        if ([38, 40].indexOf(keyCode) > -1) { // up、down
           if (keyCode === 38) { // up
             nextIndex = currentIndex !== 0 ? currentIndex - 1 : 0;
           } else {
@@ -211,10 +211,10 @@
           this.treeItemArray[nextIndex].focus(); // 选中
         }
         const hasInput = currentItem.querySelector('[type="checkbox"]');
-        if ([37, 39].includes(keyCode)) { // left、right 展开
+        if ([37, 39].indexOf(keyCode) > -1) { // left、right 展开
           currentItem.click(); // 选中
         }
-        if ([13, 32].includes(keyCode)) { // space enter选中checkbox
+        if ([13, 32].indexOf(keyCode) > -1) { // space enter选中checkbox
           if (hasInput) {
             hasInput.click();
           }