报错内容:
 [Vue warn]: Error in render: “TypeError: Cannot read property ‘length’ of null”
 found in
 —> at uni_modules/uview-ui/components/u-textarea/u-textarea.vue
 at uni_modules/uview-ui/components/u–textarea/u–textarea.vue
 mp.runtime.esm.js?3240:5840 TypeError: Cannot read property ‘length’ of null
 解决:
 找到uview源码中的u-textarea组件,发现这里是直接判断的字符长度,所以会报错
 
 修改为:
 