From 8305d3016b7e1b76dfd71fa5baa7a6ac40f2299f Mon Sep 17 00:00:00 2001
From: wangyaqi <wangyaqi988@163.com>
Date: Mon, 11 Mar 2024 12:11:24 +0800
Subject: [PATCH] =?UTF-8?q?feat(uni-app-x=20web):=20input=E3=80=81textarea?=
 =?UTF-8?q?=20maxlength=E9=80=BB=E8=BE=91=E8=B0=83=E6=95=B4?=
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1. 默认值调整为w3c规范一样，默认为不限制长度
2. 初始value值也受maxlength限制（w3c规范不受maxlength限制）
3. maxlength调整默认后，设置非法值时按默认值处理
4. 合法值是0和正整数。负数是非法值，按不限制对待。但正小数，是取整对待（不是四舍五入）
---
 packages/uni-components/src/helpers/useField.ts | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/packages/uni-components/src/helpers/useField.ts b/packages/uni-components/src/helpers/useField.ts
index e280feba0c9..8de411a0b74 100644
--- a/packages/uni-components/src/helpers/useField.ts
+++ b/packages/uni-components/src/helpers/useField.ts
@@ -220,7 +220,13 @@ function useBase(
   })
   const maxlength = computed(() => {
     var maxlength = Number(props.maxlength)
-    return isNaN(maxlength) ? 140 : maxlength
+    if (__X__) {
+      return isNaN(maxlength) || maxlength < 0
+        ? Infinity
+        : Math.floor(maxlength)
+    } else {
+      return isNaN(maxlength) ? 140 : maxlength
+    }
   })
   const value =
     getValueString(props.modelValue, props.type) ||
@@ -241,7 +247,10 @@ function useBase(
   )
   watch(
     () => state.maxlength,
-    (val) => (state.value = state.value.slice(0, val))
+    (val) => (state.value = state.value.slice(0, val)),
+    {
+      immediate: __X__ ? true : false,
+    }
   )
   return {
     fieldRef,