15个提高javascript开发的技巧（手把手教你7个有趣的JavaScript）
15个提高javascript开发的技巧（手把手教你7个有趣的JavaScript）《一文让你彻底搞懂移动前端和Web 前端区别在哪里》《手把手教你前端代码如何做错误上报「JS篇」》<!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">
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》
《手把手教你前端代码如何做错误上报「JS篇」》
《一文让你彻底搞懂移动前端和Web 前端区别在哪里》
《63个JavaScript 正则大礼包「值得收藏」》
《提高你的 JavaScript 技能10 个问答题》
《JavaScript图表库的5个首选》
《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》
《教你如何用动态规划和贪心算法实现前端瀑布流布局「实践」》
《可视化的 js：动态图演示 Promises & Async/Await 的过程》
《原生JS封装拖动验证滑块你会吗？「实践」》
《如何实现高性能的在线 PDF 预览》
《细说使用字体库加密数据-仿58同城》
《Node.js要完了吗？》
《Pug 3.0.0正式发布，不再支持 Node.js 6/8》
《纯JS手写轮播图（代码逻辑清晰，通俗易懂）》
《JavaScript 20 年 中文版之创立标准》
《值得收藏的前端常用60余种工具方法「JS篇」》
《箭头函数和常规函数之间的 5 个区别》
《通过发布/订阅的设计模式搞懂 Node.js 核心模块 Events》
《「前端篇」不再为正则烦恼》
《「速围」Node.js V14.3.0 发布支持顶级 Await 和 REPL 增强功能》
《深入细品浏览器原理「流程图」》
《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」》
《前端必备基础知识：window.location 详解》
《不要再依赖CommonJS了》
《犀牛书作者：最该忘记的JavaScript特性》
《36个工作中常用的JavaScript函数片段「值得收藏」》
《Node H5 实现大文件分片上传、断点续传》
《一文了解文件上传全过程（1.8w字深度解析）「前端进阶必备」》
《【实践总结】关于小程序挣脱枷锁实现批量上传》
《手把手教你前端的各种文件上传攻略和大文件断点续传》
《字节跳动面试官：请你实现一个大文件上传和断点续传》
《谈谈前端关于文件上传下载那些事【实践】》
《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》
《最全的 JavaScript 模块化方案和工具》
《「前端进阶」JS中的内存管理》
《JavaScript正则深入以及10个非常有意思的正则实战》
《前端面试者经常忽视的一道JavaScript 面试题》
《一行JS代码实现一个简单的模板字符串替换「实践」》
《JS代码是如何被压缩的「前端高级进阶」》
《前端开发规范：命名规范、html规范、css规范、js规范》
《【规范篇】前端团队代码规范最佳实践》
《100个原生JavaScript代码片段知识点详细汇总【实践】》
《关于前端174道 JavaScript知识点汇总（一）》
《关于前端174道 JavaScript知识点汇总（二）》
《关于前端174道 JavaScript知识点汇总（三）》
《几个非常有意思的javascript知识点总结【实践】》
《都2020年了，你还不会JavaScript 装饰器？》
《JavaScript实现图片合成下载》
《70个JavaScript知识点详细总结（上）【实践】》
《70个JavaScript知识点详细总结（下）【实践】》
《开源了一个 JavaScript 版敏感词过滤库》
《送你 43 道 JavaScript 面试题》
《3个很棒的小众JavaScript库，你值得拥有》
《手把手教你深入巩固JavaScript知识体系【思维导图】》
《推荐7个很棒的JavaScript产品步骤引导库》
《Echa哥教你彻底弄懂 JavaScript 执行机制》
《一个合格的中级前端工程师需要掌握的 28 个 JavaScript 技巧》
《深入解析高频项目中运用到的知识点汇总【JS篇】》
《JavaScript 工具函数大全【新】》
《从JavaScript中看设计模式(总结)》
《身份证号码的正则表达式及验证详解(JavaScript，Regex)》
《浏览器中实现JavaScript计时器的4种创新方式》
《Three.js 动效方案》
《手把手教你常用的59个JS类方法》
《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 深拷贝 vs 浅拷贝》
《手把手教你JS开发H5游戏【消灭星星】》
《深入浅出讲解JS中this/apply/call/bind巧妙用法【实践】》
《手把手教你全方位解读JS中this真正含义【实践】》
《书到用时方恨少，一大波JS开发工具函数来了》
《干货满满!如何优雅简洁地实现时钟翻牌器(支持JS/Vue/React)》
《手把手教你JS 异步编程六种方案【实践】》
《让你减少加班的15条高效JS技巧知识点汇总【实践】》
《手把手教你JS开发H5游戏【黄金矿工】》
《手把手教你JS实现监控浏览器上下左右滚动》
《JS 经典实例知识点整理汇总【实践】》
《2.6万字JS干货分享，带你领略前端魅力【基础篇】》
《2.6万字JS干货分享，带你领略前端魅力【实践篇】》
《简单几步让你的 JS 写得更漂亮》
《恭喜你获得治疗JS this的详细药方》
《谈谈前端关于文件上传下载那些事【实践】》
《面试中教你绕过关于 JavaScript 作用域的 5 个坑》
《Jquery插件（常用的插件库）》
《【JS】如何防止重复发送ajax请求》
《JavaScript Canvas实现自定义画板》
《Continuation 在 JS 中的应用「前端篇」》
