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scrollInToView方法 #8

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Liqihan opened this issue Oct 12, 2017 · 0 comments
Open

scrollInToView方法 #8

Liqihan opened this issue Oct 12, 2017 · 0 comments
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blog JS

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@Liqihan
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Liqihan commented Oct 12, 2017

移动端input获取焦点的时候，弹出的软键盘可能会挡住input输入框，相当影响体验，查了一下用scrollInToView能解决这个问题，让输入框不被挡住，使用方法如下

element.scrollIntoView(alignToTop); // Boolean parameter

scrollIntoView()可以在所有的HTML元素上调用，通过滚动浏览器窗口或某个容器元素，调用元素就可以出现在视窗中。如果给该方法传入true作为参数，或者不传入任何参数，那么窗口滚动之后会让调动元素顶部和视窗顶部尽可能齐平。如果传入false作为参数，调用元素会尽可能全部出现在视口中（可能的话，调用元素的底部会与视口的顶部齐平。）不过顶部不一定齐平

Demo

<html>  
    <head>  
        <title>HTML5_ScrollInToView方法</title>  
        <meta  charset="utf-8">  
        <script type="text/javascript">  
            window.onload = function(){  
                document.querySelector("#roll1").onclick = function(){  
                    document.querySelector("#roll_top").scrollIntoView(false);  
                }  
                document.querySelector("#roll2").onclick = function(){  
                    document.querySelector("#roll_top").scrollIntoView(true);  
                }  
            }  
        </script>   
        <style type="text/css">  
            #myDiv{  
                height:900px;  
                background-color:gray;  
                  
            }  
            #roll_top{  
                height:900px;  
                background-color:green;  
                color:#FFF;  
                font-size:50px;  
                position:relative;  
            }  
            #bottom{  
                position:absolute;  
                display:block;  
                left:0;bottom:0;  
            }  
        </style>  
    </head>  
    <body>  
        <button id="roll1">scrollIntoView(false)</button>  
        <button id="roll2">scrollIntoView(true)</button>  
        <div id="myDiv"></div>  
        <div id="roll_top">  
            scrollIntoView(ture)元素上边框与视窗顶部齐平  
            <span id="bottom">scrollIntoView(false)元素下边框与视窗底部齐平</span>  
        </div>   
    </body>  
</html>

支持该方法的浏览器有 IE、Firefox、Safari和Opera。
@Liqihan Liqihan added the blog label Oct 12, 2017
@Liqihan Liqihan added the JS label Jan 25, 2018
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