封装loadResources方法

lib/utils.js

@@ -0,0 +1,27 @@
+// 封装异步加载资源的方法
+
+/**
+ * 加载外部资源
+ * @param url 地址 例如 https://xx.com/xx.js
+ * @param type js 或 css
+ * @returns {Promise<unknown>}
+ */
+export function loadExternalResource (url, type) {
+  return new Promise((resolve, reject) => {
+    let tag
+
+    if (type === 'css') {
+      tag = document.createElement('link')
+      tag.rel = 'stylesheet'
+      tag.href = url
+    } else if (type === 'js') {
+      tag = document.createElement('script')
+      tag.src = url
+    }
+    if (tag) {
+      tag.onload = () => resolve(url)
+      tag.onerror = () => reject(url)
+      document.head.appendChild(tag)
+    }
+  })
+}