假设我有一个3列CSS-Grid。有没有办法,使用JavaScript,获得自动放置元素的grid-row
和grid-column
?
例:
console.log($('#test').css('grid-row'), $('#test').css('grid-column'));
// expected output: 2 3
// actual output: two empty strings
.grid {
display: grid;
grid-template-columns: repeat( 3, 1fr);
}
<div class="grid">
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div id="test"></div>
<div></div>
<div></div>
<div></div>
</div>
这是一个JSFiddle的例子:https://jsfiddle.net/w4u87d2f/7/
在这个例子中,我可以通过计算元素并知道网格有三列来弄明白:
grid-column = $('#test').index() % 3 + 1;
grid-row = Math.ceil( $('#test').index() / 3 )
但这只适用于非常简单的网格,也意味着我必须考虑改变列数的断点。
编辑:这不是Retrieve the position (X,Y) of an HTML element的副本,因为我对像素坐标不感兴趣,而是对CSS-Grid中的行和列号感兴趣。
//Add click event for any child div of div = grid
$(document).ready(function(){
$('.grid').on('click', 'div', function(e){
GetGridElementsPosition($(this).index()); //Pass in the index of the clicked div
//Relevant to its siblings, in other words if this is the 5th div in the div = grid
});
});
function GetGridElementsPosition(index){
//Get the css attribute grid-template-columns from the css of class grid
//split on whitespace and get the length, this will give you how many columns
const colCount = $('.grid').css('grid-template-columns').split(' ').length;
const rowPosition = Math.floor(index / colCount);
const colPosition = index % colCount;
//Return an object with properties row and column
return { row: rowPosition, column: colPosition } ;
}