Vuetify - 如何使 setSelectionRange(int, int) 在 v-textarea 模型更改时工作
Vuetify - How to make setSelectionRange(int, int) work in v-textarea when its model is changed
我尝试使用方法setSelectionRange
to change the position of the cursor in a vuetify v-textarea
。
当我 不操作 由文本区域的 v-model
属性引用的数据元素时,它工作得很好。但是,如果我尝试先更改 body,然后应用 setSelectionRange
方法;光标直接移动到文末
我附上了一个简化版本的片段。一旦你在文本区域的任何地方按下退格键,光标应该 移动到索引 2;但它移到了文本的末尾。
但是,如果您再次删除 this.body
和退格键,它会平静地移动到索引 2。
new Vue({
el: '#app',
data: {
body: ''
},
created () {
this.body = 'I am initial body. Hit backspace on somewhere if you want!'
},
methods: {
onBackspaceOrDeleteButtonKeydown (event) {
// disable default behavior
event.preventDefault()
let bodyTextArea = this.$refs.pourBody.$el.querySelector('textarea')
// COMMENT OUT THE NEXT LINE TO SEE THE CURSOR MOVES TO INDEX 2 ALWAYS
this.body = 'I am changed body. My cursor should have moved to index 2 anyways, but it goes to the end like >'
bodyTextArea.setSelectionRange(2, 2)
}
}
})
<!DOCTYPE html>
<html>
<head>
<link href='https://fonts.googleapis.com/css?family=Roboto:300,400,500,700|Material+Icons' rel="stylesheet">
<link href="https://cdn.jsdelivr.net/npm/vuetify/dist/vuetify.min.css" rel="stylesheet">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no, minimal-ui">
</head>
<body>
<div id="app">
<v-app>
<v-content>
<v-container>
<v-textarea
ref="pourBody"
outline
v-model="body"
auto-grow rows="7"
@keydown.delete="onBackspaceOrDeleteButtonKeydown"
></v-textarea>
</v-container>
</v-content>
</v-app>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vuetify/dist/vuetify.js"></script>
</body>
</html>
setSelectionRange
明显不喜欢body改变。
我该如何解决?
将 setSelectionRange 包装到 setTimeout 中,就像这样 setTimeout(() => bodyTextArea.setSelectionRange(2, 2))
。在将光标设置到所需位置并重置光标位置后,v-model 会重新呈现值。您必须确保之后调用 setSelectionRange
。
除了givehug的方案你还可以做
this.$nextTick(() => {
bodyTextArea.setSelectionRange(2, 2))
})
我尝试使用方法setSelectionRange
to change the position of the cursor in a vuetify v-textarea
。
当我 不操作 由文本区域的 v-model
属性引用的数据元素时,它工作得很好。但是,如果我尝试先更改 body,然后应用 setSelectionRange
方法;光标直接移动到文末
我附上了一个简化版本的片段。一旦你在文本区域的任何地方按下退格键,光标应该 移动到索引 2;但它移到了文本的末尾。
但是,如果您再次删除 this.body
和退格键,它会平静地移动到索引 2。
new Vue({
el: '#app',
data: {
body: ''
},
created () {
this.body = 'I am initial body. Hit backspace on somewhere if you want!'
},
methods: {
onBackspaceOrDeleteButtonKeydown (event) {
// disable default behavior
event.preventDefault()
let bodyTextArea = this.$refs.pourBody.$el.querySelector('textarea')
// COMMENT OUT THE NEXT LINE TO SEE THE CURSOR MOVES TO INDEX 2 ALWAYS
this.body = 'I am changed body. My cursor should have moved to index 2 anyways, but it goes to the end like >'
bodyTextArea.setSelectionRange(2, 2)
}
}
})
<!DOCTYPE html>
<html>
<head>
<link href='https://fonts.googleapis.com/css?family=Roboto:300,400,500,700|Material+Icons' rel="stylesheet">
<link href="https://cdn.jsdelivr.net/npm/vuetify/dist/vuetify.min.css" rel="stylesheet">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no, minimal-ui">
</head>
<body>
<div id="app">
<v-app>
<v-content>
<v-container>
<v-textarea
ref="pourBody"
outline
v-model="body"
auto-grow rows="7"
@keydown.delete="onBackspaceOrDeleteButtonKeydown"
></v-textarea>
</v-container>
</v-content>
</v-app>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vuetify/dist/vuetify.js"></script>
</body>
</html>
setSelectionRange
明显不喜欢body改变。
我该如何解决?
将 setSelectionRange 包装到 setTimeout 中,就像这样 setTimeout(() => bodyTextArea.setSelectionRange(2, 2))
。在将光标设置到所需位置并重置光标位置后,v-model 会重新呈现值。您必须确保之后调用 setSelectionRange
。
除了givehug的方案你还可以做
this.$nextTick(() => {
bodyTextArea.setSelectionRange(2, 2))
})