first commiit

src/utils/index.ts

@@ -0,0 +1,58 @@
+/**
+ * Check if an element has a class
+ * @param {HTMLElement} ele
+ * @param {string} cls
+ * @returns {boolean}
+ */
+export function hasClass(ele: HTMLElement, cls: string) {
+  return !!ele.className.match(new RegExp("(\\s|^)" + cls + "(\\s|$)"));
+}
+
+/**
+ * Add class to element
+ * @param {HTMLElement} ele
+ * @param {string} cls
+ */
+export function addClass(ele: HTMLElement, cls: string) {
+  if (!hasClass(ele, cls)) ele.className += " " + cls;
+}
+
+/**
+ * Remove class from element
+ * @param {HTMLElement} ele
+ * @param {string} cls
+ */
+export function removeClass(ele: HTMLElement, cls: string) {
+  if (hasClass(ele, cls)) {
+    const reg = new RegExp("(\\s|^)" + cls + "(\\s|$)");
+    ele.className = ele.className.replace(reg, " ");
+  }
+}
+
+/**
+ * 判断是否是外部链接
+ *
+ * @param {string} path
+ * @returns {Boolean}
+ */
+export function isExternal(path: string) {
+  const isExternal = /^(https?:|http?:|mailto:|tel:)/.test(path);
+  return isExternal;
+}
+
+/**
+ * 格式化增长率，保留两位小数 ，并且去掉末尾的0  取绝对值
+ *
+ * @param growthRate
+ * @returns
+ */
+export function formatGrowthRate(growthRate: number) {
+  if (growthRate === 0) {
+    return "-";
+  }
+
+  const formattedRate = Math.abs(growthRate * 100)
+    .toFixed(2)
+    .replace(/\.?0+$/, "");
+  return formattedRate + "%";
+}