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AngularJS ng-minlength 指令


示例

如果输入值少于五个字符,则显示错误

<form name="myForm">

<input name="myInput" ng-model="myInput" ng-minlength="5">

<h1 ng-if="!myForm.myInput.$valid">值太短</h1>

</form>
亲自试一试 »

定义和用法

ng-minlength 指令为输入字段和表单的验证器添加了一个限制。

如果值的长度小于指定的长度,则 ng-minlength 指令会添加输入字段的“无效”状态。

注意:如果值为空,则被认为有效。


语法

<input type="text" ng-minlength="number"></input>

主要受类型为文本的 <input> 元素支持,但也可以用于允许用户输入的其他元素。


参数值

描述
number 表示输入字段合法字符的最小数量。

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