v-bind 和 {{}} 的区别? [英] Difference between v-bind and {{}}?

问题描述

我有一个输入字段，其中的值字段被传递一个存储在 Vuex 中的字符串.输入字段的变化被去抖动，新的字符串同步到 Vuex.

I have an input field with the value field being passed a string stored in Vuex. The input fields changes are debounced and the new string synced to Vuex.

当像这样绑定:value="vuexState.myString时，输入时，光标跳到行尾.

When bound like this :value="vuexState.myString, when typing, the cursor jumps to the end of the line.

当这样绑定 value={{vuexState.myString}} 时，光标停留在它所在的位置.

When bound like this value={{vuexState.myString}}, the cursor stays where it is.

根据指南:http://vuejs.org/guide/syntax.html#Arguments这两个应该是一样的，{{}} 样式在内部转换为 :bind.这可能是一个错误吗?

According to the guide: http://vuejs.org/guide/syntax.html#Arguments These two should be the same, with the {{ }} style being internally converted to :bind. Could this be a bug?

我的理论是，光标跳转发生是因为 vuex 状态更改重新渲染输入，并且 {{ }} 样式仅插入一次，而绑定语法每隔改变.

My theory is that the cursor jumping occurs because the vuex state change re-renders the input and that the {{ }} style is interpolated only once while the binding syntax re-renders the input every change.

我目前正在使用 value={{vuexState.myString}} 但我想知道发生了什么或者是否有更好的方法来做到这一点.

I am currently using value={{vuexState.myString}} but I'd like to know what is happening or if there is a better way to do this.

推荐答案

在Interpolation 并且已被弃用(参见.Migration guit来自 1.x)

It's in the documentation about Interpolation and has been deprecated (see. Migration guit from 1.x)

这是老方法

<div class="btn btn-primary hint--top {{class}}"></div>

解决方案

改用 Javascript 表达式:

Solution

Use Javascript expression instead:

<div v-bind:class="'btn btn-success hint--top '+ class "></div>

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