Javascript-在按下键后保持按下状态(返回true）
Javascript - after pressing the Key stays in a pressed state (returns true)
您必须首先单击anyare，这样才能注册shift pressing。
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!doctype html>
<html>
<head>
<title>Display Coloring</title>
<script src="jquery-2.2.1.min.js"></script>
<style type="text/css">
div {
background-color: rgb(0, 0, 0);
width: 20px;
height: 20px;
left: 0;
top: 0;
bottom: 0;
line-height: 0;
margin: 0;
padding: 0;
display: inline-block;
float: left;
}
body {
top: 0;
left: 0;
bottom: 0;
margin: 0;
padding: 0;
margin: 0;
width: 1920px;
height: 1080px;
}
div:hover {
background-color: rgb(0, 0, 0);
background-color: rgba(255, 0, 0, 0.5);
}
input {
float: left;
width: 20px;
height: 20px;
top: 0;
left: 0;
bottom: 0;
padding: 0;
-webkit-appearance: none;
background-color: rgba(0, 0, 0, 0);
box-shadow: none !important;
outline: none;
border: none;
word-spacing: 0;
letter-spacing: 0;
}
#conDiv {
width: 1920px;
height: 1080px;
background-color: transparent;
position: absolute;
z-index: 1;
}
#conInput {
width: 1920px;
height: 1080px;
position: absolute;
z-index: -1;
}
</style>
</head>
<body>
<script>
var body = document.body;
a = [];
b = [];
c = [];
i = [];
d = [];
clicked = [];
altDown = false;
window.onload = function() {
conInput = document.createElement('div');
conInput.setAttribute('id', 'conInput');
document.body.appendChild(conInput);
conDiv = document.createElement('div');
conDiv.setAttribute('id', 'conDiv');
document.body.appendChild(conDiv);
//for(u=0;u<1911;u+=10){
for (u = 0; u < 1901; u += 20) {
a.push(u);
for (v = 0; v < 1061; v += 20) {
//for(v=0; v<1071; v+=10){
b.push(v);
var newDiv = document.createElement("div");
newDiv.id = b.length - 1;
conDiv.appendChild(newDiv);
}
}
//for(u=0;u<1911;u+=10){
// for(v=0; v<1071; v+=10){
for (u = 0; u < 1901; u += 20) {
for (v = 0; v < 1061; v += 20) {
c.push(v);
var newInput = document.createElement("input");
newInput.setAttribute('type', 'color');
newInput.id = c.length - 1;
conInput.appendChild(newInput);
}
}
function marking() {
$("body").on("keydown keyup", function(event) {
if (event.type == "keydown") {
console.log(event.type);
$('div').hover(function() {
if (event.keyCode == 16 && this.id !== "conDiv" && this.id !== "conInput") {
clicked.push(this);
this.style.backgroundColor = "#b3ffb3";
console.log(event);
}
})
} else {
console.log(event);
$('div').hover(function() {
if (event.keyCode == 16) {
//if()
if (this.id !== "conDiv" && this.id !== "conInput") {
this.style.backgroundColor = "#000000";
//console.log(event.shiftKey);
}
}
})
}
})
}
function changeColor() {
divs = body.getElementsByTagName('div');
inputs = body.getElementsByTagName('input');
for (var l = 0; l < inputs.length; l++) {
if (inputs[l].id !== "conInput") {
i.push(inputs[l]);
}
}
for (var k = 0; k < divs.length; k++) {
if (divs[k].id !== "conDiv" && divs[k].id !== "conInput") {
d.push(divs[k]);
}
}
$(document).ready(function() {
$("body").bind("keydown", function(event) {
if (event.altKey) {
for (var h in d) {
//if(d[h].id == "10272" && altDown == false){
if (d[h].id == "2544" && altDown == false) {
d[h].style.opacity = "0.4";
altDown = true;
}
//else if(d[h].id == "10272" && altDown == true) {
else if (d[h].id == "2544" && altDown == true) {
d[h].style.opacity = "1";
altDown = false;
}
}
}
});
});
$('div').on('click', function() {
if (this.id != "conDiv" && this.id != "conInput") {
if (event.ctrlKey) {
clicked.push(this);
for (var h in d) {
if (d[h].id == this.id) {
$(d[h]).css('background-color', 'rgba(255, 255, 102, 0.8)');
}
}
} else if (clicked.length > 0) {
for (var clk in clicked) {
target = document.getElementById(this.id);
$(target).click();
$(target).on('change', function() {
newColor = this.value;
parsed = newColor.charAt(0) == "#" ? newColor.substring(1, 7) : newColor;
r = parseInt(parsed.substring(0, 2), 16).toString();
g = parseInt(parsed.substring(2, 4), 16).toString();
b = parseInt(parsed.substring(4, 6), 16).toString();
newColorRGB = "(" + r + ", " + g + ", " + b + ")";
for (clk in clicked) {
clicked[clk].style.backgroundColor = newColor;
clicked[clk].setAttribute("title", newColorRGB);
}
clicked = [];
});
}
} else if (clicked.length == 0) {
for (var z in i) {
if (i[z].id == this.id) {
target = document.getElementById(this.id);
$(target).click();
$(target).on('change', function() {
newColor = this.value;
parsed = newColor.charAt(0) == "#" ? newColor.substring(1, 7) : newColor;
r = parseInt(parsed.substring(0, 2), 16).toString();
g = parseInt(parsed.substring(2, 4), 16).toString();
b = parseInt(parsed.substring(4, 6), 16).toString();
newColorRGB = "(" + r + ", " + g + ", " + b + ")";
for (var h in d) {
if (d[h].id == this.id) {
d[h].style.backgroundColor = newColor;
d[h].setAttribute("title", newColorRGB);
}
}
});
}
}
}
}
});
}
changeColor();
marking();
}
</script>
</body>
</html>如果我按下shiftKey，它会工作，div会得到它们的颜色，但如果我释放shiftKey，状态会保持true，并且它会保持颜色，直到刷新。
这是代码：
function marking(){
$("body").bind("keydown", function(event) {
$('div').hover(function(){
if(event.shiftKey){
if(this.id !== "conDiv" && this.id !== "conInput"){
clicked.push(this);
this.style.backgroundColor = "#b3ffb3";
console.log(event.shiftKey);
}
}
else{};
}
})
});
}
我能告诉程序在释放shiftKey时做出反应吗？
更新
$("body").on("keydown keyup", function(event) {
if(event.type == "keydown"){
$('div').hover(function(){
if(event.keyCode == 16 && this.id !== "conDiv" && this.id !== "conInput"){
clicked.push(this);
this.style.backgroundColor = "#b3ffb3";
console.log(event);
}
})
}
else{
console.log(event);
$('div').hover(function(){
if(event.keyCode == 16){
if(this.id !== "conDiv" && this.id !== "conInput"){
this.style.backgroundColor = "#000000";
}
}
})
}
})
现在，它将shiftKey上的颜色更改为#000000，并将keyup的颜色改为#000000。但它仍然停留在键下，如果我将鼠标悬停在div上，它会将对象推入我的数组，而不会着色。
我希望它在按下Shift键时着色，而在释放Shift键时不执行任何操作。
我错过了什么？
您似乎需要的是mousemove事件和shiftKey event property。
现在的一个问题是，您没有取消设置悬停处理程序，该处理程序是在按下shift时设置的。
主要区别在于
function marking() {
$("body").on("mousemove", "div", function(event) {
if (event.shiftKey) {
this.style.backgroundColor "#b3ffb3";
}
})
}
我已经在下面修改了你的代码
<!doctype html>
<html>
<head>
<title>Display Coloring</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<style type="text/css">
div {
background-color: rgb(0, 0, 0);
width: 20px;
height: 20px;
left: 0;
top: 0;
bottom: 0;
line-height: 0;
margin: 0;
padding: 0;
display: inline-block;
float: left;
}
body {
top: 0;
left: 0;
bottom: 0;
margin: 0;
padding: 0;
margin: 0;
width: 1920px;
height: 1080px;
}
div:hover {
background-color: rgb(0, 0, 0);
background-color: rgba(255, 0, 0, 0.5);
}
input {
float: left;
width: 20px;
height: 20px;
top: 0;
left: 0;
bottom: 0;
padding: 0;
-webkit-appearance: none;
background-color: rgba(0, 0, 0, 0);
box-shadow: none !important;
outline: none;
border: none;
word-spacing: 0;
letter-spacing: 0;
}
#conDiv {
width: 1920px;
height: 1080px;
background-color: transparent;
position: absolute;
z-index: 1;
}
#conInput {
width: 1920px;
height: 1080px;
position: absolute;
z-index: -1;
}
</style>
</head>
<body>
<script>
var body = document.body;
a = [];
b = [];
c = [];
i = [];
d = [];
clicked = [];
altDown = false;
window.onload = function() {
conInput = document.createElement('div');
conInput.setAttribute('id', 'conInput');
document.body.appendChild(conInput);
conDiv = document.createElement('div');
conDiv.setAttribute('id', 'conDiv');
document.body.appendChild(conDiv);
//for(u=0;u<1911;u+=10){
for (u = 0; u < 1901; u += 20) {
a.push(u);
for (v = 0; v < 1061; v += 20) {
//for(v=0; v<1071; v+=10){
b.push(v);
var newDiv = document.createElement("div");
newDiv.id = b.length - 1;
conDiv.appendChild(newDiv);
}
}
//for(u=0;u<1911;u+=10){
// for(v=0; v<1071; v+=10){
for (u = 0; u < 1901; u += 20) {
for (v = 0; v < 1061; v += 20) {
c.push(v);
var newInput = document.createElement("input");
newInput.setAttribute('type', 'color');
newInput.id = c.length - 1;
conInput.appendChild(newInput);
}
}
function marking() {
$("body").on("mousemove", "div", function(event) {
if (event.shiftKey) {
this.style.backgroundColor = "#b3ffb3";
}
})
}
function changeColor() {
divs = body.getElementsByTagName('div');
inputs = body.getElementsByTagName('input');
for (var l = 0; l < inputs.length; l++) {
if (inputs[l].id !== "conInput") {
i.push(inputs[l]);
}
}
for (var k = 0; k < divs.length; k++) {
if (divs[k].id !== "conDiv" && divs[k].id !== "conInput") {
d.push(divs[k]);
}
}
$(document).ready(function() {
$("body").bind("keydown", function(event) {
if (event.altKey) {
for (var h in d) {
//if(d[h].id == "10272" && altDown == false){
if (d[h].id == "2544" && altDown == false) {
d[h].style.opacity = "0.4";
altDown = true;
}
//else if(d[h].id == "10272" && altDown == true) {
else if (d[h].id == "2544" && altDown == true) {
d[h].style.opacity = "1";
altDown = false;
}
}
}
});
});
$('div').on('click', function() {
if (this.id != "conDiv" && this.id != "conInput") {
if (event.ctrlKey) {
clicked.push(this);
for (var h in d) {
if (d[h].id == this.id) {
$(d[h]).css('background-color', 'rgba(255, 255, 102, 0.8)');
}
}
} else if (clicked.length > 0) {
for (var clk in clicked) {
target = document.getElementById(this.id);
$(target).click();
$(target).on('change', function() {
newColor = this.value;
parsed = newColor.charAt(0) == "#" ? newColor.substring(1, 7) : newColor;
r = parseInt(parsed.substring(0, 2), 16).toString();
g = parseInt(parsed.substring(2, 4), 16).toString();
b = parseInt(parsed.substring(4, 6), 16).toString();
newColorRGB = "(" + r + ", " + g + ", " + b + ")";
for (clk in clicked) {
clicked[clk].style.backgroundColor = newColor;
clicked[clk].setAttribute("title", newColorRGB);
}
clicked = [];
});
}
} else if (clicked.length == 0) {
for (var z in i) {
if (i[z].id == this.id) {
target = document.getElementById(this.id);
$(target).click();
$(target).on('change', function() {
newColor = this.value;
parsed = newColor.charAt(0) == "#" ? newColor.substring(1, 7) : newColor;
r = parseInt(parsed.substring(0, 2), 16).toString();
g = parseInt(parsed.substring(2, 4), 16).toString();
b = parseInt(parsed.substring(4, 6), 16).toString();
newColorRGB = "(" + r + ", " + g + ", " + b + ")";
for (var h in d) {
if (d[h].id == this.id) {
d[h].style.backgroundColor = newColor;
d[h].setAttribute("title", newColorRGB);
}
}
});
}
}
}
}
});
}
changeColor();
marking();
}
</script>
</body>
</html>您需要编写代码来撤消keyup中的着色。
您已经正确地编写了keydown，但该事件中没有任何内容表明当用户不再使用密钥时反转此代码。
keyup明确表示向下点击键，keydown明确表示释放键。
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