[improvement] rename packages dir to src (#3659)

src/tabs/Title.js

@@ -0,0 +1,82 @@
+import { createNamespace } from '../utils';
+
+const bem = createNamespace('tab')[1];
+
+export default {
+  props: {
+    type: String,
+    color: String,
+    title: String,
+    active: Boolean,
+    ellipsis: Boolean,
+    disabled: Boolean,
+    scrollable: Boolean,
+    activeColor: String,
+    inactiveColor: String,
+    swipeThreshold: Number
+  },
+
+  computed: {
+    style() {
+      const style = {};
+      const { color, active } = this;
+      const isCard = this.type === 'card';
+
+      // card theme color
+      if (color && isCard) {
+        style.borderColor = color;
+
+        if (!this.disabled) {
+          if (active) {
+            style.backgroundColor = color;
+          } else {
+            style.color = color;
+          }
+        }
+      }
+
+      const titleColor = active ? this.activeColor : this.inactiveColor;
+      if (titleColor) {
+        style.color = titleColor;
+      }
+
+      if (this.scrollable && this.ellipsis) {
+        style.flexBasis = `${88 / this.swipeThreshold}%`;
+      }
+
+      return style;
+    }
+  },
+
+  methods: {
+    onClick() {
+      this.$emit('click');
+    },
+
+    renderTitle(el) {
+      const { title } = this.$refs;
+      title.innerHTML = '';
+      title.appendChild(el);
+    }
+  },
+
+  render(h) {
+    return (
+      <div
+        role="tab"
+        aria-selected={this.active}
+        class={bem({
+          active: this.active,
+          disabled: this.disabled,
+          complete: !this.ellipsis
+        })}
+        style={this.style}
+        onClick={this.onClick}
+      >
+        <span ref="title" class={{ 'van-ellipsis': this.ellipsis }}>
+          {this.title}
+        </span>
+      </div>
+    );
+  }
+};