VueJS:向左，元素的顶部位置? [英] VueJS: Get left, top position of element?

问题描述

在转换旧的 jquery 代码时，我一直在获取元素的位置.

我的目标是在 a 标签上方显示浮动 div.

这是我的模板.

<div :class="['marker-info', markInfoBusStop.markerInfoActiveClass]":style="markInfoBusStop.markerInfoStyle"><p><strong>{{markInfoBusStop.busStopNo}}</strong>{{markInfoBusStop.busStopName}}</p><dl>...</dl>

Vue 代码如下.

数据:{标记信息巴士站:{busStopNo: '12345',标记信息活动类:''，标记信息样式:{左:'200px'，顶部:'200px'}},...},方法: {onMouseEnterBusStop:函数(ev){让左 = ev.clientX;让顶部 = ev.clientY;this.markInfoBusStop.markerInfoActiveClass = 'active';this.markInfoBusStop.markerInfoStyle.left = left + 'px';this.markInfoBusStop.markerInfoStyle.top = top + 'px';}

我只是使用当前鼠标指针的位置，但需要元素的绝对位置.

我的旧 jquery 使用 $(this).position() 如下.

$(document).on("mouseenter", "a.marker", function() {var left = $(this).position().left;var top = $(this).position().top;$(".marker-info").stop().addClass("active").css({"left":left, "top": top});});

提前致谢.

解决方案

这本身不是一个 Vue 问题，而是一个 javascript 问题.现在执行此操作的常用方法是使用 element.getBoundingClientRect() 方法.在您的情况下，这将是:

创建一个ref 在你的 <a> 元素上，并在这样的方法中传递该 ref:

在你的方法对象中创建处理点击的方法:

方法:{getPos(巴士站){const left = this.$refs.busstop.getBoundingClientRect().leftconst top = this.$refs.busstop.getBoundingClientRect().top...}}

当前所有浏览器都支持:https://caniuse.com/#feat=getboundingclientrect

更多信息在这里:

https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect

While converting legacy jquery code, I stuck at getting position of element.

My goal is display floating div above a tag.

Here is my template.

<a href="#none" v-for="busstop in busstops"
   :id="busstop.id"
   @mouseenter="onMouseEnterBusStop"
   @mouseleave="onMouseLeaveBusStop"
   onclick="detailsOpen(this);">
<div :class="['marker-info', markInfoBusStop.markerInfoActiveClass]"
     :style="markInfoBusStop.markerInfoStyle">
    <p><strong>{{markInfoBusStop.busStopNo}}</strong>{{markInfoBusStop.busStopName}}</p>
    <dl>
      ...
    </dl>
</div>

Vue code is below.

data: {
  markInfoBusStop: { 
      busStopNo: '12345',
      markerInfoActiveClass: '',
      markerInfoStyle: {
        left: '200px',
        top: '200px'
      }
  },
  ...
},
methods: {
  onMouseEnterBusStop: function(ev) {
    let left = ev.clientX;
    let top = ev.clientY;
    this.markInfoBusStop.markerInfoActiveClass = 'active';
    this.markInfoBusStop.markerInfoStyle.left = left + 'px';
    this.markInfoBusStop.markerInfoStyle.top = top + 'px';
}

I'm just using current mouse pointer's position, but need element's absolute position.

My legacy jquery is using $(this).position() as below.

$(document).on("mouseenter", "a.marker", function() {
    var left = $(this).position().left;
    var top = $(this).position().top;
    $(".marker-info").stop().addClass("active").css({"left":left, "top": top});
});

Thanks in advance.

解决方案

This is not a Vue question per se, but more a javascript question. The common way to do this now is by using the element.getBoundingClientRect() method. In your case this would be:

Create a ref on your <a> element and pass that ref in a method like this:

<a ref = "busstop" 
     href="#none"  
    v-for="busstop in busstops" 
    @click = getPos(busstop)>

In your methods object create the method to handle the click:

methods: {
    getPos(busstop) {
         const left = this.$refs.busstop.getBoundingClientRect().left
         const top = this.$refs.busstop.getBoundingClientRect().top
         ...
    }
}

Supported by all current browsers: https://caniuse.com/#feat=getboundingclientrect

More info here:

https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect

这篇关于VueJS:向左，元素的顶部位置?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！