试试这个：

I only accept numbers:
<input type="text" v-model="form.availability" oninput="this.value = this.value.replace(/[^0-9]/g, '');">
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I only accept numbers inlcuding a point:
<input type="text" v-model="form.availability" oninput="this.value = this.value.replace(/[^0-9.]/g, '').replace(/(\..*)\./g, '$1');">
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EDIT: I accept negative numbers inlcuding a point:
<input type="text" v-model="form.availability" oninput="this.value = this.value.replace(/[^0-9.-]/g, '').replace(/(\..*)\./g, '$1');">
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EDIT: I accept negative numbers inlcuding a point:
<input type="text" v-model="form.availability" oninput="this.value = this.value.replace(/[^0-9.-]/g, '').replace(/(\..*)\./g, '$1').replace(/(\..*)\./g, '$1');">
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EDIT2: I accept negative numbers inlcuding a point (only one "minus" sign):
<input type="text" v-model="form.availability" oninput="this.value = this.value.replace(/[^0-9.-]/g, '').replace(/(\..*)\./g, '$1').replace(/(\..*)\./g, '$1').replace(/(\-.*)\-/g, '$1');">
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EDIT3: I also accept "e" and "E"
<input type="text" v-model="form.availability" oninput="this.value = this.value.replace(/[^0-9\.\-\e\E]/g, '').replace(/(\..*)\./g, '$1').replace(/(\..*)\./g, '$1').replace(/(\-.*)\-/g, '$1').replace(/(\e.*)\e/g, '$1').replace(/(\E.*)\E/g, '$1');">
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不同的浏览器对“输入类型编号”的处理方式不同

请尝试<input type="number" inputmode="numeric">或<input type="tel" inputmode="numeric">

Vue.js中有解决方法。您可以使用**$event.target**，其中包含更多详细信息。它包含对象**'validity'，其属性'badInput'会告诉我们值是否正确。
请参见下面示例，对于错误值'如' e23 '，'--1**'，我们将获得可在验证规则中使用**' NaN '**
第一个