From 9a508de397c6f723e2a77a06c919071abce07fb1 Mon Sep 17 00:00:00 2001
From: rex <rexkaneki@gmail.com>
Date: Wed, 3 Jun 2020 11:03:28 +0800
Subject: [PATCH] fix(button): compatible form-field-button in low sdk version
 (#3229)

---
 example/project.config.json | 19 +++++++++++++++++--
 packages/button/index.ts    |  8 +++++++-
 packages/common/version.ts  |  5 +++++
 3 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/example/project.config.json b/example/project.config.json
index 78e2d532..885a07ff 100644
--- a/example/project.config.json
+++ b/example/project.config.json
@@ -7,13 +7,28 @@
 		"urlCheck": false,
 		"es6": true,
 		"postcss": true,
+		"preloadBackgroundData": false,
 		"minified": true,
 		"newFeature": true,
-		"nodeModules": true
+		"coverView": true,
+		"nodeModules": true,
+		"autoAudits": false,
+		"showShadowRootInWxmlPanel": true,
+		"scopeDataCheck": false,
+		"checkInvalidKey": true,
+		"checkSiteMap": true,
+		"uploadWithSourceMap": true,
+		"babelSetting": {
+			"ignore": [],
+			"disablePlugins": [],
+			"outputPath": ""
+		},
+		"useCompilerModule": false,
+		"userConfirmedUseCompilerModuleSwitch": false
 	},
 	"compileType": "miniprogram",
 	"cloudfunctionRoot": "functions/",
-	"libVersion": "2.9.3",
+	"libVersion": "2.3.0",
 	"appid": "wx1c01b35002d3ba14",
 	"projectname": "vant-weapp",
 	"debugOptions": {
diff --git a/packages/button/index.ts b/packages/button/index.ts
index 37941126..7880e621 100644
--- a/packages/button/index.ts
+++ b/packages/button/index.ts
@@ -1,9 +1,15 @@
 import { VantComponent } from '../common/component';
 import { button } from '../mixins/button';
 import { openType } from '../mixins/open-type';
+import { canIUseFormFieldButton } from '../common/version';
+
+const mixins = [button, openType];
+if (canIUseFormFieldButton()) {
+  mixins.push('wx://form-field-button');
+}
 
 VantComponent({
-  mixins: [button, openType, 'wx://form-field-button'],
+  mixins,
 
   classes: ['hover-class', 'loading-class'],
 
diff --git a/packages/common/version.ts b/packages/common/version.ts
index 593f9f5c..ca3eba1b 100644
--- a/packages/common/version.ts
+++ b/packages/common/version.ts
@@ -31,3 +31,8 @@ export function canIUseModel() {
   const system = getSystemInfoSync();
   return compareVersion(system.SDKVersion, '2.9.3') >= 0;
 }
+
+export function canIUseFormFieldButton() {
+  const system = getSystemInfoSync();
+  return compareVersion(system.SDKVersion, '2.10.3') >= 0;
+}