患者1.2

miniprogram_npm/@vant/weapp/field/index.js

@@ -49,11 +49,19 @@ var props_1 = require("./props");
         this.setData({ innerValue: this.value });
     },
     methods: {
+        formatValue: function (value) {
+            var maxlength = this.data.maxlength;
+            if (maxlength !== -1 && value.length > maxlength) {
+                return value.slice(0, maxlength);
+            }
+            return value;
+        },
         onInput: function (event) {
             var _a = (event.detail || {}).value, value = _a === void 0 ? '' : _a;
-            this.value = value;
+            var formatValue = this.formatValue(value);
+            this.value = formatValue;
             this.setShowClear();
-            this.emitChange(event.detail);
+            return this.emitChange(__assign(__assign({}, event.detail), { value: formatValue }));
         },
         onFocus: function (event) {
             this.focused = true;
@@ -102,14 +110,16 @@ var props_1 = require("./props");
             this.$emit('keyboardheightchange', event.detail);
         },
         emitChange: function (detail) {
-            var _this = this;
             var extraEventParams = this.data.extraEventParams;
             this.setData({ value: detail.value });
-            (0, utils_1.nextTick)(function () {
-                var data = extraEventParams ? detail : detail.value;
-                _this.$emit('input', data);
-                _this.$emit('change', data);
-            });
+            var result;
+            var data = extraEventParams
+                ? __assign(__assign({}, detail), { callback: function (data) {
+                        result = data;
+                    } }) : detail.value;
+            this.$emit('input', data);
+            this.$emit('change', data);
+            return result;
         },
         setShowClear: function () {
             var _a = this.data, clearable = _a.clearable, readonly = _a.readonly, clearTrigger = _a.clearTrigger;