Get element height with Vuejs

2019-03-20 09:31发布

站内问答 / JavaScript
1661 2 5

I want to get the height of a div in order to make the height of another div matching it. I used the method clientHeight, but It doesn't return me the good value (smaller value). Actually, It seems to return a height before all elements are charged. After some research online, I tried to put a window.load() to delay until everything is charged but it doesn't work as well. Some ideas ?

mounted () {
  this.matchHeight()
},
matchHeight () {
  let height = document.getElementById('info-box').clientHeight
}
<div class="columns">
  <div class="left-column" id="context">
  <p>Some text</p>
  </div>
  <div class="right-column" id="info-box">
    <img />
    <ul>
      some list
    </ul>
  </div>
</div>

2条回答
▲ chillily
2楼-- · 2019-03-20 10:33

I would use flexbox to achieve equal height columns https://css-tricks.com/snippets/css/a-guide-to-flexbox/

.container {
   display: flex;
}
.column {
   border: 1px solid;
   padding: 20px;
   width: 150px;
}
<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
</head>

<body>
    <div class="container">
        <div class="column">
            Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer ac dui sed erat venenatis fermentum. Nulla tempus, magna
            sit amet ornare fringilla, ligula quam faucibus urna
        </div>
        <div class="column">
            Lorem ipsum dolor sit amet, consectetur adipiscing elit.
        </div>
    </div>
</body>
</html>

查看更多
0人赞 添加讨论(0) 举报
贼婆χ
3楼-- · 2019-03-20 10:37

The way you are doing it is fine. But there is another vue specific way via a ref attribute.

 mounted () {
   this.matchHeight()
 },
 matchHeight () {
   let height = this.$refs.infoBox.clientHeight;
 }



    <div class="columns">
        <div class="left-column" id="context">
            <p>Some text</p>
        </div>
        <div class="right-column" id="info-box" ref="infoBox"></>
            <img />
            <ul>
                some list
            </ul>
        </div>
    </div>

In this case, since you are just getting the value it really doesn't matter whether you use your original getElementById approach or the vue specific ref approach. However if you were setting the value on the element then it's much better to use the ref approach so that vue understands that the value has changed and won't possibly overwrite the value with the original value if it needs to update that node in the DOM.

You can learn more here: https://vuejs.org/v2/api/#vm-refs

Update

A few people had left comments that the above solution didn't work for them. That solution provided the concepts but not full working code as example, so I have augmented my answer with the code below which demonstrates the concepts. 

var app = new Vue({
    el: '#app',
    data: function () {
        return {
            leftColStyles: { },
            lines: ['one', 'two','three']
        }
    },
    methods: {
        matchHeight() {
            var heightString = this.$refs.infoBox.clientHeight + 'px';
            Vue.set(this.leftColStyles, 'height', heightString); 
        }
    },
    mounted() {
        this.matchHeight();
    }

});
.columns{width:300px}
.left-column {float:left; width:200px; border:solid 1px black}
.right-column {float:right; border:solid 1px blue; }
<div id="app">
    <div class="columns">
        <div class="left-column" id="context" v-bind:style="leftColStyles">
            <p>Some text</p>
        </div>
        <div class="right-column" id="info-box" ref="infoBox"> 
            <img />
            <ul>
                <li v-for="line in lines" v-text="line"></li>
            </ul>
        </div>
    </div>

</div>

 <script src="https://unpkg.com/vue@2.2.5/dist/vue.min.js"></script>

Here is a screenshot of the results in the browser:

enter image description here

查看更多
0人赞 添加讨论(0) 举报
登录 后发表回答
相关问题
查看全部
相关文章
查看全部
收藏的人(5)