前言
JavaScript是最好的语言之一，尤其是在前端开发中。在本文中，您将找到7个为初学者提供免费源代码的最佳javascript项目。
手把手教你7个有趣的JavaScript 项目-上「附源码」
接下来小编继续。
6.创建JavaScript简单计算器codepen
您已经学习了HTML和CSS以及javascript的基础知识，并且想要创建一些东西来评估自己的技能，构建一个简单的js计算器可以使您的技能更上一层楼。
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>简单计算器</title>
<style type="text/css">
body {
width: 500px;
margin: 4% auto;
font-family: 'Source Sans Pro', sans-serif;
letter-spacing: 5px;
font-size: 1.8rem;
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
}
.calculator {
padding: 20px;
-webkit-box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
border-radius: 1px;
}
.input {
border: 1px solid #ddd;
border-radius: 1px;
height: 60px;
padding-right: 15px;
padding-top: 10px;
text-align: right;
margin-right: 6px;
font-size: 2.5rem;
overflow-x: auto;
transition: all .2s ease-in-out;
}
.input:hover {
border: 1px solid #bbb;
-webkit-box-shadow: inset 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
box-shadow: inset 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
}
.buttons {}
.operators {}
.operators div {
display: inline-block;
border: 1px solid #bbb;
border-radius: 1px;
width: 80px;
text-align: center;
padding: 10px;
margin: 20px 4px 10px 0;
cursor: pointer;
background-color: #ddd;
transition: border-color .2s ease-in-out, background-color .2s, box-shadow .2s;
}
.operators div:hover {
background-color: #ddd;
-webkit-box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
border-color: #aaa;
}
.operators div:active {
font-weight: bold;
}
.leftPanel {
display: inline-block;
}
.numbers div {
display: inline-block;
border: 1px solid #ddd;
border-radius: 1px;
width: 80px;
text-align: center;
padding: 10px;
margin: 10px 4px 10px 0;
cursor: pointer;
background-color: #f9f9f9;
transition: border-color .2s ease-in-out, background-color .2s, box-shadow .2s;
}
.numbers div:hover {
background-color: #f1f1f1;
-webkit-box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
border-color: #bbb;
}
.numbers div:active {
font-weight: bold;
}
div.equal {
display: inline-block;
border: 1px solid #3079ED;
border-radius: 1px;
width: 17%;
text-align: center;
padding: 127px 10px;
margin: 10px 6px 10px 0;
vertical-align: top;
cursor: pointer;
color: #FFF;
background-color: #4d90fe;
transition: all .2s ease-in-out;
}
div.equal:hover {
background-color: #307CF9;
-webkit-box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
border-color: #1857BB;
}
div.equal:active {
font-weight: bold;
}
</style>
</head>
<body>
<div class="calculator">
<div class="input" id="input"></div>
<div class="buttons">
<div class="operators">
<div>+</div>
<div>-</div>
<div>×</div>
<div>÷</div>
</div>
<div class="leftPanel">
<div class="numbers">
<div>7</div>
<div>8</div>
<div>9</div>
</div>
<div class="numbers">
<div>4</div>
<div>5</div>
<div>6</div>
</div>
<div class="numbers">
<div>1</div>
<div>2</div>
<div>3</div>
</div>
<div class="numbers">
<div>0</div>
<div>.</div>
<div id="clear">C</div>
</div>
</div>
<div class="equal" id="result">=</div>
</div>
</div>
<script type="text/javascript">
"use strict";
var input = document.getElementById('input'), // input/output button
number = document.querySelectorAll('.numbers div'), // number buttons
operator = document.querySelectorAll('.operators div'), // operator buttons
result = document.getElementById('result'), // equal button
clear = document.getElementById('clear'), // clear button
resultDisplayed = false; // flag to keep an eye on what output is displayed
// adding click handlers to number buttons
for (var i = 0; i < number.length; i++) {
number[i].addEventListener("click", function(e) {
// storing current input string and its last character in variables - used later
var currentString = input.innerHTML;
var lastChar = currentString[currentString.length - 1];
// if result is not diplayed, just keep adding
if (resultDisplayed === false) {
input.innerHTML += e.target.innerHTML;
} else if (resultDisplayed === true && lastChar === "+" || lastChar === "-" || lastChar === "×" || lastChar === "÷") {
// if result is currently displayed and user pressed an operator
// we need to keep on adding to the string for next operation
resultDisplayed = false;
input.innerHTML += e.target.innerHTML;
} else {
// if result is currently displayed and user pressed a number
// we need clear the input string and add the new input to start the new opration
resultDisplayed = false;
input.innerHTML = "";
input.innerHTML += e.target.innerHTML;
}
});
}
// adding click handlers to number buttons
for (var i = 0; i < operator.length; i++) {
operator[i].addEventListener("click", function(e) {
// storing current input string and its last character in variables - used later
var currentString = input.innerHTML;
var lastChar = currentString[currentString.length - 1];
// if last character entered is an operator, replace it with the currently pressed one
if (lastChar === "+" || lastChar === "-" || lastChar === "×" || lastChar === "÷") {
var newString = currentString.substring(0, currentString.length - 1) + e.target.innerHTML;
input.innerHTML = newString;
} else if (currentString.length == 0) {
// if first key pressed is an opearator, don't do anything
console.log("enter a number first");
} else {
// else just add the operator pressed to the input
input.innerHTML += e.target.innerHTML;
}
});
}
// on click of 'equal' button
result.addEventListener("click", function() {
// this is the string that we will be processing eg. -10+26+33-56*34/23
var inputString = input.innerHTML;
// forming an array of numbers. eg for above string it will be: numbers = ["10", "26", "33", "56", "34", "23"]
var numbers = inputString.split(/\+|\-|\×|\÷/g);
// forming an array of operators. for above string it will be: operators = ["+", "+", "-", "*", "/"]
// first we replace all the numbers and dot with empty string and then split
var operators = inputString.replace(/[0-9]|\./g, "").split("");
console.log(inputString);
console.log(operators);
console.log(numbers);
console.log("----------------------------");
// now we are looping through the array and doing one operation at a time.
// first divide, then multiply, then subtraction and then addition
// as we move we are alterning the original numbers and operators array
// the final element remaining in the array will be the output
var divide = operators.indexOf("÷");
while (divide != -1) {
numbers.splice(divide, 2, numbers[divide] / numbers[divide + 1]);
operators.splice(divide, 1);
divide = operators.indexOf("÷");
}
var multiply = operators.indexOf("×");
while (multiply != -1) {
numbers.splice(multiply, 2, numbers[multiply] * numbers[multiply + 1]);
operators.splice(multiply, 1);
multiply = operators.indexOf("×");
}
var subtract = operators.indexOf("-");
while (subtract != -1) {
numbers.splice(subtract, 2, numbers[subtract] - numbers[subtract + 1]);
operators.splice(subtract, 1);
subtract = operators.indexOf("-");
}
var add = operators.indexOf("+");
while (add != -1) {
// using parseFloat is necessary, otherwise it will result in string concatenation :)
numbers.splice(add, 2, parseFloat(numbers[add]) + parseFloat(numbers[add + 1]));
operators.splice(add, 1);
add = operators.indexOf("+");
}
input.innerHTML = numbers[0]; // displaying the output
resultDisplayed = true; // turning flag if result is displayed
});
// clearing the input on press of clear
clear.addEventListener("click", function() {
input.innerHTML = "";
})
</script>
</body>
</html>7.使用JavaScript制作腌制里克游戏
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>腌制里克游戏</title>
<style type="text/css">
$menuHeight: 65px+10px;
@mixin transition {
transition-property: background-color opacity;
transition-duration: 0.2s;
transition-timing-function: ease-in-out;
}
html,
body {
width: 100vw;
height: 100vh;
position: fixed;
padding: 0;
margin: 0;
top: 0;
bottom: 0;
left: 0;
right: 0;
}
#mazeContainer {
transition-property: opacity;
transition-duration: 1s;
transition-timing-function: linear;
top: $menuHeight;
opacity: 0;
display: inline-block;
background-color: rgba(0, 0, 0, 0.30);
margin: auto;
#mazeCanvas {
margin: 0;
display: block;
border: solid 1px black;
}
}
input,
select {
@include transition;
cursor: pointer;
background-color: rgba(0, 0, 0, 0.30);
height: 45px;
width: 150px;
padding: 10px;
border: none;
border-radius: 5px;
color: white;
display: inline-block;
font-size: 15px;
text-align: center;
text-decoration: none;
appearance: none;
&:hover {
background-color: rgba(0, 0, 0, 0.70);
}
&:active {
background-color: black;
}
&:focus {
outline: none;
}
}
.custom-select {
display: inline-block;
select {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAh0lEQVQ4T93TMQrCUAzG8V9x8QziiYSuXdzFC7h4AcELOPQAdXYovZCHEATlgQV5GFTe1ozJlz/kS1IpjKqw3wQBVyy++JI0y1GTe7DCBbMAckeNIQKk/BanALBB+16LtnDELoMcsM/BESDlz2heDR3WePwKSLo5eoxz3z6NNcFD+vu3ij14Aqz/DxGbKB7CAAAAAElFTkSuQmCC');
background-repeat: no-repeat;
background-position: 125px center;
}
}
#Message-Container {
visibility: hidden;
color: white;
display: block;
width: 100vw;
height: 100vh;
position: fixed;
top: 0;
left: 0;
bottom: 0;
right: 0;
background-color: rgba(0, 0, 0, 0.30);
z-index: 1;
#message {
width: 300px;
height: 300px;
position: fixed;
top: 50%;
left: 50%;
margin-left: -150px;
margin-top: -150px;
}
}
#page {
font-family: "Segoe UI", Arial, sans-serif;
text-align: center;
height: auto;
width: auto;
margin: auto;
#menu {
margin: auto;
padding: 10px;
height: 65px;
box-sizing: border-box;
h1 {
margin: 0;
margin-bottom: 10px;
font-weight: 600;
font-size: 3.2rem;
}
}
#view {
position: absolute;
top:65px;
bottom: 0;
left: 0;
right: 0;
width: 100%;
height: auto;
}
}
.border {
border: 1px black solid;
border-radius: 5px;
}
#gradient {
z-index: -1;
position: fixed;
top: 0;
bottom: 0;
width: 100vw;
height: 100vh;
color: #fff;
background: linear-gradient(-45deg, #EE7752, #E73C7E, #23A6D5, #23D5AB);
background-size: 400% 400%;
animation: Gradient 15s ease infinite;
}
@keyframes Gradient {
0% {
background-position: 0% 50%
}
50% {
background-position: 100% 50%
}
100% {
background-position: 0% 50%
}
}
/* Extra small devices (phones, 600px and down) */
@media only screen and (max-width: 400px) {
input, select{
width: 120px;
}
}
</style>
<head>
<meta charset="utf-8">
<body>
<div id="gradient"></div>
<div id="page">
<div id="Message-Container">
<div id="message">
<h1>Congratulations!</h1>
<p>You are done.</p>
<p id="moves"></p>
<input id="okBtn" type="button" onclick="toggleVisablity('Message-Container')" value="Cool!" />
</div>
</div>
<div id="menu">
<div class="custom-select">
<select id="diffSelect">
<option value="10">Easy</option>
<option value="15">Medium</option>
<option value="25">Hard</option>
<option value="38">Extreme</option>
</select>
</div>
<input id="startMazeBtn" type="button" onclick="makeMaze()" value="Start" />
</div>
<div id="view">
<div id="mazeContainer">
<canvas id="mazeCanvas" class="border" height="1100" width="1100"></canvas>
</div>
</div>
</div>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery.touchswipe/1.6.18/jquery.touchSwipe.min.js"></script>
<script type="text/javascript">
function rand(max) {
return Math.floor(Math.random() * max);
}
function shuffle(a) {
for (let i = a.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1));
[a[i], a[j]] = [a[j], a[i]];
}
return a;
}
function changeBrightness(factor, sprite) {
var virtCanvas = document.createElement("canvas");
virtCanvas.width = 500;
virtCanvas.height = 500;
var context = virtCanvas.getContext("2d");
context.drawImage(sprite, 0, 0, 500, 500);
var imgData = context.getImageData(0, 0, 500, 500);
for (let i = 0; i < imgData.data.length; i += 4) {
imgData.data[i] = imgData.data[i] * factor;
imgData.data[i + 1] = imgData.data[i + 1] * factor;
imgData.data[i + 2] = imgData.data[i + 2] * factor;
}
context.putImageData(imgData, 0, 0);
var spriteOutput = new Image();
spriteOutput.src = virtCanvas.toDataURL();
virtCanvas.remove();
return spriteOutput;
}
function displayVictoryMess(moves) {
document.getElementById("moves").innerHTML = "You Moved " + moves + " Steps.";
toggleVisablity("Message-Container");
}
function toggleVisablity(id) {
if (document.getElementById(id).style.visibility == "visible") {
document.getElementById(id).style.visibility = "hidden";
} else {
document.getElementById(id).style.visibility = "visible";
}
}
function Maze(Width, Height) {
var mazeMap;
var width = Width;
var height = Height;
var startCoord, endCoord;
var dirs = ["n", "s", "e", "w"];
var modDir = {
n: {
y: -1,
x: 0,
o: "s"
},
s: {
y: 1,
x: 0,
o: "n"
},
e: {
y: 0,
x: 1,
o: "w"
},
w: {
y: 0,
x: -1,
o: "e"
}
};
this.map = function() {
return mazeMap;
};
this.startCoord = function() {
return startCoord;
};
this.endCoord = function() {
return endCoord;
};
function genMap() {
mazeMap = new Array(height);
for (y = 0; y < height; y++) {
mazeMap[y] = new Array(width);
for (x = 0; x < width; ++x) {
mazeMap[y][x] = {
n: false,
s: false,
e: false,
w: false,
visited: false,
priorPos: null
};
}
}
}
function defineMaze() {
var isComp = false;
var move = false;
var cellsVisited = 1;
var numLoops = 0;
var maxLoops = 0;
var pos = {
x: 0,
y: 0
};
var numCells = width * height;
while (!isComp) {
move = false;
mazeMap[pos.x][pos.y].visited = true;
if (numLoops >= maxLoops) {
shuffle(dirs);
maxLoops = Math.round(rand(height / 8));
numLoops = 0;
}
numLoops++;
for (index = 0; index < dirs.length; index++) {
var direction = dirs[index];
var nx = pos.x + modDir[direction].x;
var ny = pos.y + modDir[direction].y;
if (nx >= 0 && nx < width && ny >= 0 && ny < height) {
//Check if the tile is already visited
if (!mazeMap[nx][ny].visited) {
//Carve through walls from this tile to next
mazeMap[pos.x][pos.y][direction] = true;
mazeMap[nx][ny][modDir[direction].o] = true;
//Set Currentcell as next cells Prior visited
mazeMap[nx][ny].priorPos = pos;
//Update Cell position to newly visited location
pos = {
x: nx,
y: ny
};
cellsVisited++;
//Recursively call this method on the next tile
move = true;
break;
}
}
}
if (!move) {
// If it failed to find a direction,
// move the current position back to the prior cell and Recall the method.
pos = mazeMap[pos.x][pos.y].priorPos;
}
if (numCells == cellsVisited) {
isComp = true;
}
}
}
function defineStartEnd() {
switch (rand(4)) {
case 0:
startCoord = {
x: 0,
y: 0
};
endCoord = {
x: height - 1,
y: width - 1
};
break;
case 1:
startCoord = {
x: 0,
y: width - 1
};
endCoord = {
x: height - 1,
y: 0
};
break;
case 2:
startCoord = {
x: height - 1,
y: 0
};
endCoord = {
x: 0,
y: width - 1
};
break;
case 3:
startCoord = {
x: height - 1,
y: width - 1
};
endCoord = {
x: 0,
y: 0
};
break;
}
}
genMap();
defineStartEnd();
defineMaze();
}
function DrawMaze(Maze, ctx, cellsize, endSprite = null) {
var map = Maze.map();
var cellSize = cellsize;
var drawEndMethod;
ctx.lineWidth = cellSize / 40;
this.redrawMaze = function(size) {
cellSize = size;
ctx.lineWidth = cellSize / 50;
drawMap();
drawEndMethod();
};
function drawCell(xCord, yCord, cell) {
var x = xCord * cellSize;
var y = yCord * cellSize;
if (cell.n == false) {
ctx.beginPath();
ctx.moveTo(x, y);
ctx.lineTo(x + cellSize, y);
ctx.stroke();
}
if (cell.s === false) {
ctx.beginPath();
ctx.moveTo(x, y + cellSize);
ctx.lineTo(x + cellSize, y + cellSize);
ctx.stroke();
}
if (cell.e === false) {
ctx.beginPath();
ctx.moveTo(x + cellSize, y);
ctx.lineTo(x + cellSize, y + cellSize);
ctx.stroke();
}
if (cell.w === false) {
ctx.beginPath();
ctx.moveTo(x, y);
ctx.lineTo(x, y + cellSize);
ctx.stroke();
}
}
function drawMap() {
for (x = 0; x < map.length; x++) {
for (y = 0; y < map[x].length; y++) {
drawCell(x, y, map[x][y]);
}
}
}
function drawEndFlag() {
var coord = Maze.endCoord();
var gridSize = 4;
var fraction = cellSize / gridSize - 2;
var colorSwap = true;
for (let y = 0; y < gridSize; y++) {
if (gridSize % 2 == 0) {
colorSwap = !colorSwap;
}
for (let x = 0; x < gridSize; x++) {
ctx.beginPath();
ctx.rect(
coord.x * cellSize + x * fraction + 4.5,
coord.y * cellSize + y * fraction + 4.5,
fraction,
fraction
);
if (colorSwap) {
ctx.fillStyle = "rgba(0, 0, 0, 0.8)";
} else {
ctx.fillStyle = "rgba(255, 255, 255, 0.8)";
}
ctx.fill();
colorSwap = !colorSwap;
}
}
}
function drawEndSprite() {
var offsetLeft = cellSize / 50;
var offsetRight = cellSize / 25;
var coord = Maze.endCoord();
ctx.drawImage(
endSprite,
2,
2,
endSprite.width,
endSprite.height,
coord.x * cellSize + offsetLeft,
coord.y * cellSize + offsetLeft,
cellSize - offsetRight,
cellSize - offsetRight
);
}
function clear() {
var canvasSize = cellSize * map.length;
ctx.clearRect(0, 0, canvasSize, canvasSize);
}
if (endSprite != null) {
drawEndMethod = drawEndSprite;
} else {
drawEndMethod = drawEndFlag;
}
clear();
drawMap();
drawEndMethod();
}
function Player(maze, c, _cellsize, onComplete, sprite = null) {
var ctx = c.getContext("2d");
var drawSprite;
var moves = 0;
drawSprite = drawSpriteCircle;
if (sprite != null) {
drawSprite = drawSpriteImg;
}
var player = this;
var map = maze.map();
var cellCoords = {
x: maze.startCoord().x,
y: maze.startCoord().y
};
var cellSize = _cellsize;
var halfCellSize = cellSize / 2;
this.redrawPlayer = function(_cellsize) {
cellSize = _cellsize;
drawSpriteImg(cellCoords);
};
function drawSpriteCircle(coord) {
ctx.beginPath();
ctx.fillStyle = "yellow";
ctx.arc(
(coord.x + 1) * cellSize - halfCellSize,
(coord.y + 1) * cellSize - halfCellSize,
halfCellSize - 2,
0,
2 * Math.PI
);
ctx.fill();
if (coord.x === maze.endCoord().x && coord.y === maze.endCoord().y) {
onComplete(moves);
player.unbindKeyDown();
}
}
function drawSpriteImg(coord) {
var offsetLeft = cellSize / 50;
var offsetRight = cellSize / 25;
ctx.drawImage(
sprite,
0,
0,
sprite.width,
sprite.height,
coord.x * cellSize + offsetLeft,
coord.y * cellSize + offsetLeft,
cellSize - offsetRight,
cellSize - offsetRight
);
if (coord.x === maze.endCoord().x && coord.y === maze.endCoord().y) {
onComplete(moves);
player.unbindKeyDown();
}
}
function removeSprite(coord) {
var offsetLeft = cellSize / 50;
var offsetRight = cellSize / 25;
ctx.clearRect(
coord.x * cellSize + offsetLeft,
coord.y * cellSize + offsetLeft,
cellSize - offsetRight,
cellSize - offsetRight
);
}
function check(e) {
var cell = map[cellCoords.x][cellCoords.y];
moves++;
switch (e.keyCode) {
case 65:
case 37: // west
if (cell.w == true) {
removeSprite(cellCoords);
cellCoords = {
x: cellCoords.x - 1,
y: cellCoords.y
};
drawSprite(cellCoords);
}
break;
case 87:
case 38: // north
if (cell.n == true) {
removeSprite(cellCoords);
cellCoords = {
x: cellCoords.x,
y: cellCoords.y - 1
};
drawSprite(cellCoords);
}
break;
case 68:
case 39: // east
if (cell.e == true) {
removeSprite(cellCoords);
cellCoords = {
x: cellCoords.x + 1,
y: cellCoords.y
};
drawSprite(cellCoords);
}
break;
case 83:
case 40: // south
if (cell.s == true) {
removeSprite(cellCoords);
cellCoords = {
x: cellCoords.x,
y: cellCoords.y + 1
};
drawSprite(cellCoords);
}
break;
}
}
this.bindKeyDown = function() {
window.addEventListener("keydown", check, false);
$("#view").swipe({
swipe: function(
event,
direction,
distance,
duration,
fingerCount,
fingerData
) {
console.log(direction);
switch (direction) {
case "up":
check({
keyCode: 38
});
break;
case "down":
check({
keyCode: 40
});
break;
case "left":
check({
keyCode: 37
});
break;
case "right":
check({
keyCode: 39
});
break;
}
},
threshold: 0
});
};
this.unbindKeyDown = function() {
window.removeEventListener("keydown", check, false);
$("#view").swipe("destroy");
};
drawSprite(maze.startCoord());
this.bindKeyDown();
}
var mazeCanvas = document.getElementById("mazeCanvas");
var ctx = mazeCanvas.getContext("2d");
var sprite;
var finishSprite;
var maze, draw, player;
var cellSize;
var difficulty;
// sprite.src = 'media/sprite.png';
window.onload = function() {
let viewWidth = $("#view").width();
let viewHeight = $("#view").height();
if (viewHeight < viewWidth) {
ctx.canvas.width = viewHeight - viewHeight / 100;
ctx.canvas.height = viewHeight - viewHeight / 100;
} else {
ctx.canvas.width = viewWidth - viewWidth / 100;
ctx.canvas.height = viewWidth - viewWidth / 100;
}
//Load and edit sprites
var completeOne = false;
var completeTwo = false;
var isComplete = () => {
if(completeOne === true && completeTwo === true)
{
console.log("Runs");
setTimeout(function(){
makeMaze();
}, 500);
}
};
sprite = new Image();
sprite.src =
"https://image.ibb.co/dr1HZy/Pf_RWr3_X_Imgur.png" +
"?" +
new Date().getTime();
sprite.setAttribute("crossOrigin", " ");
sprite.onload = function() {
sprite = changeBrightness(1.2, sprite);
completeOne = true;
console.log(completeOne);
isComplete();
};
finishSprite = new Image();
finishSprite.src = "https://image.ibb.co/b9wqnJ/i_Q7m_U25_Imgur.png"+
"?" +
new Date().getTime();
finishSprite.setAttribute("crossOrigin", " ");
finishSprite.onload = function() {
finishSprite = changeBrightness(1.1, finishSprite);
completeTwo = true;
console.log(completeTwo);
isComplete();
};
};
window.onresize = function() {
let viewWidth = $("#view").width();
let viewHeight = $("#view").height();
if (viewHeight < viewWidth) {
ctx.canvas.width = viewHeight - viewHeight / 100;
ctx.canvas.height = viewHeight - viewHeight / 100;
} else {
ctx.canvas.width = viewWidth - viewWidth / 100;
ctx.canvas.height = viewWidth - viewWidth / 100;
}
cellSize = mazeCanvas.width / difficulty;
if (player != null) {
draw.redrawMaze(cellSize);
player.redrawPlayer(cellSize);
}
};
function makeMaze() {
//document.getElementById("mazeCanvas").classList.add("border");
if (player != undefined) {
player.unbindKeyDown();
player = null;
}
var e = document.getElementById("diffSelect");
difficulty = e.options[e.selectedIndex].value;
cellSize = mazeCanvas.width / difficulty;
maze = new Maze(difficulty, difficulty);
draw = new DrawMaze(maze, ctx, cellSize, finishSprite);
player = new Player(maze, mazeCanvas, cellSize, displayVictoryMess, sprite);
if (document.getElementById("mazeContainer").style.opacity < "100") {
document.getElementById("mazeContainer").style.opacity = "100";
}
}
</script>
</body>
</html>本篇完结
推荐JavaScript经典实例学习资料文章
《手把手教你7个有趣的JavaScript 项目-上「附源码」》
《JavaScript 使用 mediaDevices API 访问摄像头自拍》
《一文彻底搞懂JavaScript 中Object.freeze与Object.seal的用法》
《可视化的 JS：动态图演示 - 事件循环 Event Loop的过程》
《可视化的 js：动态图演示 Promises & Async/Await 的过程》
《Pug 3.0.0正式发布，不再支持 Node.js 6/8》
《通过发布/订阅的设计模式搞懂 Node.js 核心模块 Events》
《「速围」Node.js V14.3.0 发布支持顶级 Await 和 REPL 增强功能》
《JavaScript 已进入第三个时代，未来将何去何从？》
《前端上传前预览文件 image、text、json、video、audio「实践」》
《深入细品 EventLoop 和浏览器渲染、帧动画、空闲回调的关系》
《推荐13个有用的JavaScript数组技巧「值得收藏」》
《36个工作中常用的JavaScript函数片段「值得收藏」》
《一文了解文件上传全过程（1.8w字深度解析）「前端进阶必备」》
《手把手教你如何编写一个前端图片压缩、方向纠正、预览、上传插件》
《JavaScript正则深入以及10个非常有意思的正则实战》
《前端开发规范：命名规范、html规范、css规范、js规范》
《100个原生JavaScript代码片段知识点详细汇总【实践】》
《手把手教你深入巩固JavaScript知识体系【思维导图】》
《一个合格的中级前端工程师需要掌握的 28 个 JavaScript 技巧》
《身份证号码的正则表达式及验证详解(JavaScript，Regex)》
《127个常用的JS代码片段，每段代码花30秒就能看懂-【上】》
《深入浅出讲解JS中this/apply/call/bind巧妙用法【实践】》
《干货满满!如何优雅简洁地实现时钟翻牌器(支持JS/Vue/React)》