特效描述：html5手機觸屏 接紅包小游戲。canvas 紅包下落點擊接住紅包，結束計算金額及紅包個數。請用手機掃碼打開正常演示。

代碼結構

1. 引入CSS

2. 引入JS

3. HTML代碼

function set_meta() {

var body_width = document.documentElement.clientWidth;

var get_scale = (body_width / 2) / 640;

var get_content = "width=device-width, initial-scale=" + get_scale + ", minimum-scale=" + get_scale + ", maximum-scale=" + get_scale;

document.getElementById("viewport").setAttribute('content', get_content);

}

set_meta();

var canvas = document.getElementById('canvas');

var context = canvas.getContext('2d');

var canvasWidth = 640;

var canvasHeight = 1008;

var isEnd = false;//游戲結束

var five_num_left = 0;

var ten_num_left = 0;

var empty_num_left = 0;

var five_num=0;

var ten_num=0;

var empty_num=0;

var zad_num=0

var score = 0;

var body;

function animate(now) {

body.clear();

body.draw();

if (!isEnd) {

requestNextAnimationFrame(animate);

}

}

$().ready(function () {

body = new Body();

timedCount();

window.requestNextAnimationFrame(animate);

})

var time = 20;

var clock;

function timedCount() {

$("#clock").html(time + "秒");

if (time <= 0) {

clearTimeout(clock);

this.isEnd = true;

} else {

time = time - 1;

clock = setTimeout("timedCount()", 1000);

}

}

總結

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