first commit

node_modules/vant/es/area/utils.mjs

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+const AREA_EMPTY_CODE = "000000";
+const INHERIT_SLOTS = [
+  "title",
+  "cancel",
+  "confirm",
+  "toolbar",
+  "columns-top",
+  "columns-bottom"
+];
+const INHERIT_PROPS = [
+  "title",
+  "loading",
+  "readonly",
+  "optionHeight",
+  "swipeDuration",
+  "visibleOptionNum",
+  "cancelButtonText",
+  "confirmButtonText"
+];
+const makeOption = (text = "", value = AREA_EMPTY_CODE, children = void 0) => ({
+  text,
+  value,
+  children
+});
+function formatDataForCascade({
+  areaList,
+  columnsNum,
+  columnsPlaceholder: placeholder
+}) {
+  const {
+    city_list: city = {},
+    county_list: county = {},
+    province_list: province = {}
+  } = areaList;
+  const showCity = +columnsNum > 1;
+  const showCounty = +columnsNum > 2;
+  const getProvinceChildren = () => {
+    if (showCity) {
+      return placeholder.length > 1 ? [
+        makeOption(
+          placeholder[1],
+          AREA_EMPTY_CODE,
+          showCounty ? [] : void 0
+        )
+      ] : [];
+    }
+  };
+  const provinceMap = /* @__PURE__ */ new Map();
+  Object.keys(province).forEach((code) => {
+    provinceMap.set(
+      code.slice(0, 2),
+      makeOption(province[code], code, getProvinceChildren())
+    );
+  });
+  const cityMap = /* @__PURE__ */ new Map();
+  if (showCity) {
+    const getCityChildren = () => {
+      if (showCounty) {
+        return placeholder.length > 2 ? [makeOption(placeholder[2])] : [];
+      }
+    };
+    Object.keys(city).forEach((code) => {
+      const option = makeOption(city[code], code, getCityChildren());
+      cityMap.set(code.slice(0, 4), option);
+      const province2 = provinceMap.get(code.slice(0, 2));
+      if (province2) {
+        province2.children.push(option);
+      }
+    });
+  }
+  if (showCounty) {
+    Object.keys(county).forEach((code) => {
+      const city2 = cityMap.get(code.slice(0, 4));
+      if (city2) {
+        city2.children.push(makeOption(county[code], code));
+      }
+    });
+  }
+  const options = Array.from(provinceMap.values());
+  if (placeholder.length) {
+    const county2 = showCounty ? [makeOption(placeholder[2])] : void 0;
+    const city2 = showCity ? [makeOption(placeholder[1], AREA_EMPTY_CODE, county2)] : void 0;
+    options.unshift(makeOption(placeholder[0], AREA_EMPTY_CODE, city2));
+  }
+  return options;
+}
+export {
+  AREA_EMPTY_CODE,
+  INHERIT_PROPS,
+  INHERIT_SLOTS,
+  formatDataForCascade
+};