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input输入限制
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只能输入数字

  1.     <el-input
  2.         v-model="parseObj"
  3.          placeholder="请输入数字"
  4.          @keyup.native="parseObj=parseObj.replace(/[^\d]/g,'')" 
  5.          maxlength="9"
  6.        >
  7.      </el-input>

输入框只能输入汉字

  1.     <el-input
  2.         v-model="parseObj"
  3.          placeholder="请输入汉字"
  4.          @keyup.native="parseObj=parseObj.replace(/[\u4E00-\u9FA5]/g,'')" 
  5.          maxlength="9"
  6.        >
  7.      </el-input>

输入框输入除汉字以外的文字

  1.     <el-input
  2.         v-model="parseObj"
  3.          placeholder="请输入汉字"
  4.          @keyup.native="parseObj=parseObj.replace(/[\u4E00-\u9FA5]/g,'')" 
  5.          maxlength="9"
  6.        >
  7.      </el-input>

输入框只能输入字母

  1.     <el-input
  2.         v-model="parseObj"
  3.          placeholder="请输入字母"
  4.          @keyup.native="parseObj=parseObj.replace(/[^A-Za-z0-9]/g,'')" 
  5.          maxlength="9"
  6.        >
  7.      </el-input>
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