document.onmousemove 仅由我的 js class 最后创建的 object 处理
document.onmousemove only handled by the last created object of my js class
我正在尝试创建一个 class 的可移动元素,我得到了两个 this.functions
,我的 clique
函数适用于每个 child 的class 但我的 maousemauve
与 mousemove
事件相关,仅适用于最后创建的 object。
我认为问题出在不包含 this.
语句的 document.onmousemove = this.maousemauve
声明,但我没有找到其他方法,是否可以做我想做的事与 class 构造函数有关,还是我以错误的方式寻找?
//déclaration de classe, entre parenthéses, les paramètres "inconnus"qui me permettront de définir rapidement mes futurs objets!
class Domino {
constructor(id, side1, side2, c) {
this.id = id;
this.side1 = side1;
this.side2 = side2;
this.lien = document.getElementById(id);
this.c = c;
this.clique = (event) => {
this.c += 1;
this.lien.style.position = 'absolute';
if (this.c === 2) {
this.c = 0;
console.log(this);
return this.c;
}
console.log(this.c);
return this.c;
}
this.maousemauve = (event) => {
if (this.c === 1) {
console.log(this.c);
this.lien.style.left = event.clientX - 50 + 'px';
this.lien.style.top = event.clientY - 30 + 'px';
}
}
this.lien.onclick = this.clique;
this.lien.onmousemove = this.maousemauve;
}
}
var d1 = new Domino("d1", 0, 1, 0);
var d2 = new Domino("d2", 0, 1, 0);
var d3 = new Domino("d3", 0, 1, 0);
console.log(d1);
console.log(d2);
console.log(d3);
body {
width: 1000px;
height: 800px;
}
/*j'utilise les propriétés flex pour aligner les mots au centre dans mes dominos!*/
#d1 {
width: 100px;
height: 60px;
background-color: black;
color: white;
display: flex;
justify-content: center;
align-items: center;
}
#d2 {
width: 100px;
height: 60px;
background-color: black;
color: white;
display: flex;
justify-content: center;
align-items: center;
}
#d3 {
width: 100px;
height: 60px;
background-color: black;
color: white;
display: flex;
justify-content: center;
align-items: center;
}
<body>
<br /><br />
<div id="d1"> d1 </div>
<div id="d2"> d2 </div>
<div id="d3"> d3 </div>
</body>
我在您的评论中看到您显然自己找到了解决方案...但效果不佳。
所以这里有一些提示:
- 使用
Element#addEventListener()
而不是 Element#onXXX
属性来设置事件。
- 添加一个 属性(在我的示例中为
Domino#isMoving
),这将使您知道您的元素当前是否正在移动。 (也许 Domino#c
是您代码中的那个,但我不确定。)
click
事件将反转 isMoving
值。然后,如果 isMoving === true
,它将添加一个 mousemove
事件,否则将删除它。该事件需要附加到 document
,否则您的问题:“如果我将光标快速移动,多米诺骨牌将不会跟随光标”将不会已更正。
查看简化示例:
class Domino {
constructor(id) {
this.id = id;
this.lien = document.getElementById(id);
// Allows to know if the domino is moving or not.
this.isMoving = false;
this.lien.addEventListener('click', (e) => {
this.listenOnClick(e);
});
}
listenOnClick(e) {
const handleMouseMove = (e) => {
this.listenOnMouseMove(e);
};
this.lien.style.position = 'absolute';
// If not moving, it is moving...
// Or if it's moving, it's not moving!
this.isMoving = !this.isMoving;
// If it's moving, add an event listener on the document when the mouse is moving
if (this.isMoving) {
// Attachs the listener on document, because the mouse is *always* on the document. So even if the mouse is outside the domino, it will move.
document.addEventListener('mousemove', handleMouseMove);
} // Or if it's not, remove that event.
else {
document.removeEventListener('mousemove', handleMouseMove);
}
}
listenOnMouseMove(e) {
if (this.isMoving) {
this.lien.style.left = e.clientX - 50 + 'px';
this.lien.style.top = e.clientY - 30 + 'px';
}
}
}
let d1 = new Domino('d1');
d2 = new Domino('d2');
body {
width: 1000px;
height: 800px;
}
.domino {
width: 100px;
height: 60px;
background-color: black;
color: white;
display: flex;
justify-content: center;
align-items: center;
}
<body>
<div id="d1" class="domino">d1</div>
<div id="d2" class="domino">d2</div>
</body>
我正在尝试创建一个 class 的可移动元素,我得到了两个 this.functions
,我的 clique
函数适用于每个 child 的class 但我的 maousemauve
与 mousemove
事件相关,仅适用于最后创建的 object。
我认为问题出在不包含 this.
语句的 document.onmousemove = this.maousemauve
声明,但我没有找到其他方法,是否可以做我想做的事与 class 构造函数有关,还是我以错误的方式寻找?
//déclaration de classe, entre parenthéses, les paramètres "inconnus"qui me permettront de définir rapidement mes futurs objets!
class Domino {
constructor(id, side1, side2, c) {
this.id = id;
this.side1 = side1;
this.side2 = side2;
this.lien = document.getElementById(id);
this.c = c;
this.clique = (event) => {
this.c += 1;
this.lien.style.position = 'absolute';
if (this.c === 2) {
this.c = 0;
console.log(this);
return this.c;
}
console.log(this.c);
return this.c;
}
this.maousemauve = (event) => {
if (this.c === 1) {
console.log(this.c);
this.lien.style.left = event.clientX - 50 + 'px';
this.lien.style.top = event.clientY - 30 + 'px';
}
}
this.lien.onclick = this.clique;
this.lien.onmousemove = this.maousemauve;
}
}
var d1 = new Domino("d1", 0, 1, 0);
var d2 = new Domino("d2", 0, 1, 0);
var d3 = new Domino("d3", 0, 1, 0);
console.log(d1);
console.log(d2);
console.log(d3);
body {
width: 1000px;
height: 800px;
}
/*j'utilise les propriétés flex pour aligner les mots au centre dans mes dominos!*/
#d1 {
width: 100px;
height: 60px;
background-color: black;
color: white;
display: flex;
justify-content: center;
align-items: center;
}
#d2 {
width: 100px;
height: 60px;
background-color: black;
color: white;
display: flex;
justify-content: center;
align-items: center;
}
#d3 {
width: 100px;
height: 60px;
background-color: black;
color: white;
display: flex;
justify-content: center;
align-items: center;
}
<body>
<br /><br />
<div id="d1"> d1 </div>
<div id="d2"> d2 </div>
<div id="d3"> d3 </div>
</body>
我在您的评论中看到您显然自己找到了解决方案...但效果不佳。
所以这里有一些提示:
- 使用
Element#addEventListener()
而不是Element#onXXX
属性来设置事件。 - 添加一个 属性(在我的示例中为
Domino#isMoving
),这将使您知道您的元素当前是否正在移动。 (也许Domino#c
是您代码中的那个,但我不确定。) click
事件将反转isMoving
值。然后,如果isMoving === true
,它将添加一个mousemove
事件,否则将删除它。该事件需要附加到document
,否则您的问题:“如果我将光标快速移动,多米诺骨牌将不会跟随光标”将不会已更正。
查看简化示例:
class Domino {
constructor(id) {
this.id = id;
this.lien = document.getElementById(id);
// Allows to know if the domino is moving or not.
this.isMoving = false;
this.lien.addEventListener('click', (e) => {
this.listenOnClick(e);
});
}
listenOnClick(e) {
const handleMouseMove = (e) => {
this.listenOnMouseMove(e);
};
this.lien.style.position = 'absolute';
// If not moving, it is moving...
// Or if it's moving, it's not moving!
this.isMoving = !this.isMoving;
// If it's moving, add an event listener on the document when the mouse is moving
if (this.isMoving) {
// Attachs the listener on document, because the mouse is *always* on the document. So even if the mouse is outside the domino, it will move.
document.addEventListener('mousemove', handleMouseMove);
} // Or if it's not, remove that event.
else {
document.removeEventListener('mousemove', handleMouseMove);
}
}
listenOnMouseMove(e) {
if (this.isMoving) {
this.lien.style.left = e.clientX - 50 + 'px';
this.lien.style.top = e.clientY - 30 + 'px';
}
}
}
let d1 = new Domino('d1');
d2 = new Domino('d2');
body {
width: 1000px;
height: 800px;
}
.domino {
width: 100px;
height: 60px;
background-color: black;
color: white;
display: flex;
justify-content: center;
align-items: center;
}
<body>
<div id="d1" class="domino">d1</div>
<div id="d2" class="domino">d2</div>
</body>