我有一个问题,当前我正在尝试将图像位置保存在本地存储中,但是我不知道该怎么做。我希望将其保存在本地存储中,因为一旦刷新页面,我仍然希望您拖动的图像与在刷新/重新加载页面之前将图像拖动到的位置相同。脚本就像带有图像的物品清单。
这是代码:
const fill1 = document.querySelector('#item1');
const empties1 = document.querySelectorAll('#block1');
const empties2 = document.querySelectorAll('#block2');
const spot1 = document.getElementById("block1")
const spot2 = document.getElementById("block2")
checkSpot1()
checkSpot2()
localStorage.spot1 = 1
localStorage.spot2 = 0
// Fill listeners
fill1.addEventListener('dragstart', dragStart);
fill1.addEventListener('dragend', dragEnd);
// Loop through empty boxes and add listeners
for (const empty of empties1) {
empty.addEventListener('dragover', dragOver);
empty.addEventListener('dragenter', dragEnter);
empty.addEventListener('dragleave', dragLeave);
empty.addEventListener('drop', dragDrop);
}
for (const empty of empties2) {
empty.addEventListener('dragover', dragOver);
empty.addEventListener('dragenter', dragEnter);
empty.addEventListener('dragleave', dragLeave);
empty.addEventListener('drop', dragDrop);
}
// Drag Functions
function dragStart() {
this.idName += ' hold';
setTimeout(() => (this.idName = 'invisible'), 0);
}
function dragEnd() {
this.idName = 'fill1';
}
function dragOver(e) {
e.preventDefault();
}
function dragEnter(e) {
e.preventDefault();
this.idName += ' hovered';
}
function dragLeave() {
this.idName = 'empties1';
this.idName = 'empties2';
}
function dragDrop() {
this.idName = 'empties1';
this.idName = 'empties2';
this.append(fill1);;
}
function checkSpot1() {
if (localStorage.getItem("spot1") == 1) {
}
}
function checkSpot2() {
if (localStorage.getItem("spot2") == 1) {
}
}
spot1.addEventListener('dragend', setspot1)
spot2.addEventListener('dragend', setspot2)
function setspot1(){
localStorage.spot1 = 1
localStorage.spot2 = 0
}
function setspot2(){
localStorage.spot1 = 0
localStorage.spot2 = 1
}
但是就像我说的那样,我不知道如何将其正确存储在localstorage中,并使其在重新加载页面之前将图像拖到其中时显示出来。
我将这样实现:(这样您可以获取被拖动元素的x和y坐标):
// this is for storing -->
function dragOver(e) {
e.preventDefault();
// Get the x and y coordinates
var x = e.clientX;
var y = e.clientY;
// store the value in localStorage
window.localStorage.setItem('x',x);
window.localStorage.setItem('y',y);
}
// => same as JQuerys document.ready();
document.addEventListener("DOMContentLoaded", function(event) {
// read the data from localstorage
var x = window.localStorage.getItem('x');
var y = window.localStorage.getItem('y');
// Now you have to set the element position to the stored values
// I am assuming you want to set it for block1, and that block1 has absolute
// positioning
// only set the position if there is already a value stored
if( x && y )
{
// I found a pure Javascript solution now
document.getElementById("block1").style.left = x+"px";
document.getElementById("block1").style.top = y+"px";
}
});
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我来说两句