Vue将input [type = number]转换为字符串值 [英] Vue converts input[type=number] to a string value
问题描述
我遇到了问题,Vue将number类型的输入字段的值转换为字符串,我无法弄清楚原因。我所遵循的指南没有遇到这个问题,正如预期的那样得到值作为数字。
I'm running into the problem, that Vue converts the value of an input field of type number into a string and I just can't figure out why. The guide I am following along does not run into this issue and get's the values as numbers, as expected.
vue docs状态,Vue将值转换为a数字,如果输入的类型是数字。
The vue docs state, that Vue would convert the value to a number, if the type of the input is number.
代码来自一个组件,但我把它调整为在JSFiddle中运行: https://jsfiddle.net/d5wLsnvp/3/
The code is originated from a component, but I adjusted it to run in JSFiddle: https://jsfiddle.net/d5wLsnvp/3/
<template>
<div class="col-sm-6 col-md-4">
<div class="panel panel-success">
<div class="panel-heading">
<h3 class="panel-title">
{{ stock.name }}
<small>(Price: {{ stock.price }})</small>
</h3>
</div>
<div class="panel-body">
<div class="pull-left">
<input type="number" class="form-control" placeholder="Quantity" v-model="quantity"/>
</div>
<div class="pull-right">
<button class="btn btn-success" @click="buyStock">Buy</button>
</div>
</div>
</div>
</div>
</template>
<script>
export default {
props: ['stock'],
data() {
return {
quantity: 0 // Init with 0 stays a number
};
},
methods: {
buyStock() {
const order = {
stockId: this.stock.id,
stockPrice: this.stock.price,
quantity: this.quantity
};
console.log(order);
this.quantity = 0; // Reset to 0 is a number
}
}
}
</script>
数量值是个问题。
它初始化为0,当我按下购买按钮时,控制台显示:
The quantity value is the issue. It is initialized with 0 and when I just press the "Buy" button, the console shows:
Object { stockId: 1, stockPrice: 110, quantity: 0 }
但是一旦我改变了价值无论是使用微调器还是只输入新值,控制台都会显示:
But as soon as I change the value by either using the spinners or just type in a new value, the console will show:
Object { stockId: 1, stockPrice: 110, quantity: "1" }
使用Firefox 59.0.2和Chrome 65.0.3325.181进行测试。两人都表示他们是最新的。我实际上也尝试在Microsoft Edge中使用相同的结果。
Tested with Firefox 59.0.2 and Chrome 65.0.3325.181. Both state that they are up to date. I actually also tried it in Microsoft Edge, with the same result.
那么我在这里缺少什么?为什么Vue没有将值转换为数字?
So what am I missing here? Why is Vue not converting the value to a number?
推荐答案
您需要使用 .number
v-model $ c $的修饰符c>
,如下所示:
You need to use .number
modifier for v-model
, like this:
<input v-model.number="quantity" type="number">
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