如何在 vuetify 和 typescript 中以编程方式聚焦 v-textarea? [英] How to focus v-textarea programatically in vuetify and typescript?

问题描述

现在似乎不可能，我尝试了一些疯狂的东西，例如:

Seems like impossible now, I tried some crazy stuff like:

(this.refs.vtextarea as any).textarea.focus()

((this.refs.vtextarea as Vue).$el as HTMLElement).focus()

等等...

的Javascript源对我来说是很难读，但是它是可悲的不得不做这样的...

Javascript source is hardly readable for me but it's sad to had to do it like this...

这是一些基本的东西，还是我遗漏了一些明显的东西?

Int this some basic stuff, or am I missing something obvious ?

PS:好吧，我在层次结构中的某处看到了 textarea 元素……也许我可以通过一些基本的 dom 子元素访问方式来访问……但这就像编写我一生中最糟糕的代码.

PS: well I see textarea element somewhere there in hierarchy... Maybe I can access by some basic dom child element access way... but this will be like writing worst code of my life.

推荐答案

Vuetify 在聚焦输入时并不总是有效，即使使用 $nextTick.

Vuetify does not always work when focusing input, even with $nextTick.

这就是我们对 input 和 textarea 的一般做法.我们实际上使用此代码将 ref 设置为我们的 form 以聚焦第一个可见的 textarea 或 input.但是，您可以只定位适合您需求的小部件.

This is how we do it generically for both input and textarea. We actually use this code with the ref set to our form in order to focus the first visible textarea or input. However, you can target just the widget that suits your needs.

mounted() {
  this.$nextTick(() => {
          const theElement = this.$refs.myRef         
          const input = theElement.querySelector('input:not([type=hidden]),textarea:not([type=hidden])')
          if (input) {
            setTimeout(() => {
              input.focus()
            }, 0)
          }
  });
}

$nextTick 和 setTimeout 的延迟可以忽略不计，通常是必需的，并且会一次又一次地为您节省时间.

The delay for $nextTick and setTimeout is negligible, often required, and will save you time and time again.

您也不需要排除type=hidden，但这不会造成伤害.

You don't need to exclude type=hidden either, but it can't hurt.

如果ref 不是HTMLElement，而是VueComponent，您可能需要使用this.$refs.myRef.$el 获取 DOM 元素.

If the ref is not an HTMLElement, but instead a VueComponent, you may need to use this.$refs.myRef.$el to get the DOM element.

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