Step 2: tạo file CSS style.css

• File style.css

/* Tìm tất cả thẻ

• Màu chữ: màu đỏ
• Kích cỡ chữ: 30px */ p { color: red; font-size: 30px; }

Kiểm tra kiến thức trong bài học này ?!

• Có bao nhiêu cách áp dụng CSS để định dạng trang web?
• Thứ tự ưu tiên của các cách như thế nào?
• Cách nào nên được sử dụng trong một dự án thực tế?

Hướng dẫn các bạn cách viết code tỏ tình cực ngầu của dân IT chỉ với HTML, CSS và JavaScript.

Nội dung

1. Trang cuagai.html

  
  
  
  
  
  
  
  
  
  
  
  
GỬI LỜI YÊU THƯƠNG  
  
  
  
  
  
  
  
  
  

  
  
  
  
 Bạn cho mình làm quen nhé hihi!
  
  
  
  
  
  
  
  

2. Code css codetotinh.cs

  
img{  
border: 0;  
}  

4. Code JS totinh.js

  
//Code JS tạo tuyết rơi  
var snowStorm = null;
function SnowStorm() {  
var imagePath = 'https://timoday.edu.vn/wp-content/uploads/2020/06/';  
var flakesMax = 45;  
var flakesMaxActive = 45;  
var vMaxX = 2;  
var vMaxY = 2;  
var usePNG = false;  
var flakeBottom = null;  
var snowStick = false;  
var snowCollect = false;  
var targetElement = null;  
var followMouse = true;  
var flakeTypes = 4;  
var flakeWidth = 6;  
var flakeHeight = 6;  
var zIndex = 10;  
var flakeLeftOffset = 0;  
var flakeRightOffset = 0;  
var addEvent = function (o, evtName, evtHandler) {  
typeof (attachEvent) == 'undefined' ? o.addEventListener(evtName, evtHandler, false) : o.attachEvent('on' + evtName, evtHandler);  
}  
var removeEvent = function (o, evtName, evtHandler) {  
typeof (attachEvent) == 'undefined' ? o.removeEventListener(evtName, evtHandler, false) : o.detachEvent('on' + evtName, evtHandler);  
}  
var classContains = function (o, cStr) {  
return (typeof (o.className) != 'undefined' ? o.className.indexOf(cStr) + 1 : false);  
}  
var s = this;  
var storm = this;  
this.timers = [];  
this.flakes = [];  
this.disabled = false;  
this.terrain = [];  
this.active = false;  
var isIE = navigator.userAgent.match(/msie/i);  
var isIE6 = navigator.userAgent.match(/msie 6/i);  
var isOldIE = (isIE && (isIE6 || navigator.userAgent.match(/msie 5/i)));  
var isWin9X = navigator.appVersion.match(/windows 98/i);  
var isiPhone = navigator.userAgent.match(/iphone/i);  
var isOpera = navigator.userAgent.match(/opera/i);  
if (isOpera) isIE = false;  
var screenX = null;  
var screenX2 = null;  
var screenY = null;  
var scrollY = null;  
var vRndX = null;  
var vRndY = null;  
var windOffset = 1;  
var windMultiplier = 2;  
var pngSupported = (!isIE || (isIE && !isIE6 && !isOldIE));  
var docFrag = document.createDocumentFragment();  
this.oControl = null;  
if (flakeLeftOffset == null) flakeLeftOffset = 0;  
if (flakeRightOffset == null) flakeRightOffset = 0;
function rnd(n, min) {  
if (isNaN(min)) min = 0;  
return (Math.random() * n) + min;  
}  
this.randomizeWind = function () {  
vRndX = plusMinus(rnd(vMaxX, 0.2));  
vRndY = rnd(vMaxY, 0.2);  
if (this.flakes) {  
for (var i = 0; i < this.flakes.length; i++) {  
if (this.flakes[i].active) this.flakes[i].setVelocities();  
}  
}  
}
function plusMinus(n) {  
return (parseInt(rnd(2)) == 1 ? n * -1 : n);  
}  
this.scrollHandler = function () {  
scrollY = (flakeBottom ? 0 : parseInt(window.scrollY || document.documentElement.scrollTop || document.body.scrollTop));  
if (isNaN(scrollY)) scrollY = 0;  
if (!flakeBottom && s.flakes) {  
for (var i = 0; i < s.flakes.length; i++) {  
if (s.flakes[i].active == 0) s.flakes[i].stick();  
}  
}  
}  
this.resizeHandler = function () {  
if (window.innerWidth || window.innerHeight) {  
screenX = window.innerWidth - (!isIE ? 16 : 2) - flakeRightOffset;  
screenY = (flakeBottom ? flakeBottom : window.innerHeight);  
} else {  
screenX = (document.documentElement.clientWidth || document.body.clientWidth || document.body.scrollWidth) - (!isIE ? 8 : 0) - flakeRightOffset;  
screenY = flakeBottom ? flakeBottom : (document.documentElement.clientHeight || document.body.clientHeight || document.body.scrollHeight);  
}  
screenX2 = parseInt(screenX / 2);  
}  
this.resizeHandlerAlt = function () {  
screenX = targetElement.offsetLeft + targetElement.offsetWidth - flakeRightOffset;  
screenY = flakeBottom ? flakeBottom : targetElement.offsetTop + targetElement.offsetHeight;  
screenX2 = parseInt(screenX / 2);  
}  
this.freeze = function () {  
if (!s.disabled) {  
s.disabled = 1;  
} else {  
return false;  
}  
for (var i = 0; i < s.timers.length; i++) {  
clearInterval(s.timers[i]);  
}  
}  
this.resume = function () {  
if (s.disabled) {  
s.disabled = 0;  
} else {  
return false;  
}  
s.timerInit();  
}  
this.toggleSnow = function () {  
if (!s.flakes.length) {  
s.start();  
s.setControlActive(true);  
} else {  
s.active = !s.active;  
if (s.active) {  
s.show();  
s.resume();  
s.setControlActive(true);  
} else {  
s.stop();  
s.freeze();  
s.setControlActive(false);  
}  
}  
}  
this.setControlActive = function (bActive) {}  
this.stop = function () {  
this.freeze();  
for (var i = this.flakes.length; i--;) {  
this.flakes[i].o.style.display = 'none';  
}  
removeEvent(window, 'scroll', s.scrollHandler);  
removeEvent(window, 'resize', s.resizeHandler);  
if (!isIE) {  
removeEvent(window, 'blur', s.freeze);  
removeEvent(window, 'focus', s.resume);  
}  
}  
this.show = function () {  
for (var i = this.flakes.length; i--;) {  
this.flakes[i].o.style.display = 'block';  
}  
}  
this.SnowFlake = function (parent, type, x, y) {  
var s = this;  
var storm = parent;  
this.type = type;  
this.x = x || parseInt(rnd(screenX - 20));  
this.y = (!isNaN(y) ? y : -rnd(screenY) - 12);  
this.vX = null;  
this.vY = null;  
this.vAmpTypes = [2.0, 1.0, 1.25, 1.0, 1.5, 1.75];  
this.vAmp = this.vAmpTypes[this.type];  
this.active = 1;  
this.o = document.createElement('img');  
this.o.style.position = 'absolute';  
this.o.style.width = flakeWidth + 'px';  
this.o.style.height = flakeHeight + 'px';  
this.o.style.fontSize = '1px';  
this.o.style.zIndex = zIndex;  
this.o.src = imagePath + this.type + (pngSupported && usePNG ? '.png' : '.gif');  
docFrag.appendChild(this.o);  
this.refresh = function () {  
s.o.style.left = s.x + 'px';  
s.o.style.top = s.y + 'px';  
}  
this.stick = function () {  
if (isIE6 || isiPhone || (targetElement != document.documentElement && targetElement != document.body)) {  
s.o.style.top = (screenY + scrollY - flakeHeight - storm.terrain[Math.floor(s.x)]) + 'px';  
} else {  
s.o.style.display = 'none';  
s.o.style.top = 'auto';  
s.o.style.bottom = '0px';  
s.o.style.position = 'fixed';  
s.o.style.display = 'block';  
}  
}  
this.vCheck = function () {  
if (s.vX >= 0 && s.vX < 0.2) {  
s.vX = 0.2;  
} else if (s.vX < 0 && s.vX > -0.2) {  
s.vX = -0.2;  
}  
if (s.vY >= 0 && s.vY < 0.2) {  
s.vY = 0.2;  
}  
}  
this.move = function () {  
s.x += s.vX * windOffset;  
s.y += (s.vY * s.vAmp);  
s.refresh();  
if (s.vX && screenX - s.x < flakeWidth + (s.vX * windOffset)) {  
s.x = 0;  
} else if ((s.vX < 0 || windOffset < 0) && s.x - flakeLeftOffset < 0 - flakeWidth) {  
s.x = screenX - flakeWidth;  
}  
var yDiff = screenY + scrollY - s.y - storm.terrain[Math.floor(s.x)];  
if (yDiff < flakeHeight) {  
s.active = 0;  
if (snowCollect && snowStick) {  
var height = [0.75, 1.5, 0.75];  
for (var i = 0; i < 2; i++) {  
storm.terrain[Math.floor(s.x) + i + 2] += height[i];  
}  
}  
s.o.style.left = (s.x / screenX * 100) + '%';  
if (!flakeBottom) {  
if (snowStick) {  
s.stick();  
} else {  
s.recycle();  
}  
}  
}  
}  
this.animate = function () {  
s.move();  
}  
this.setVelocities = function () {  
s.vX = vRndX + rnd(vMaxX * 0.12, 0.1);  
s.vY = vRndY + rnd(vMaxY * 0.12, 0.1);  
}  
this.recycle = function () {  
s.o.style.display = 'none';  
s.o.style.position = 'absolute';  
s.o.style.bottom = 'auto';  
s.setVelocities();  
s.vCheck();  
s.x = parseInt(rnd(screenX - flakeWidth - 20));  
s.y = parseInt(rnd(screenY) * -1) - flakeHeight;  
s.o.style.left = s.x + 'px';  
s.o.style.top = s.y + 'px';  
s.o.style.display = 'block';  
s.active = 1;  
}  
this.recycle();  
this.refresh();  
}  
this.snow = function () {  
var active = 0;  
var used = 0;  
var waiting = 0;  
for (var i = s.flakes.length; i--;) {  
if (s.flakes[i].active == 1) {  
s.flakes[i].move();  
active++;  
} else if (s.flakes[i].active == 0) {  
used++;  
} else {  
waiting++;  
}  
}  
if (snowCollect && !waiting) {  
s.createSnow(flakesMaxActive, true);  
}  
if (active < flakesMaxActive) {  
with(s.flakes[parseInt(rnd(s.flakes.length))]) {  
if (!snowCollect && active == 0) {  
recycle();  
} else if (active == -1) {  
active = 1;  
}  
}  
}  
}  
this.mouseMove = function (e) {  
if (!followMouse) return true;  
var x = parseInt(e.clientX);  
if (x < screenX2) {  
windOffset = -windMultiplier + (x / screenX2 * windMultiplier);  
} else {  
x -= screenX2;  
windOffset = (x / screenX2) * windMultiplier;  
}  
}  
this.createSnow = function (limit, allowInactive) {  
for (var i = 0; i < limit; i++) {  
s.flakes[s.flakes.length] = new s.SnowFlake(s, parseInt(rnd(flakeTypes)));  
if (allowInactive || i > flakesMaxActive) s.flakes[s.flakes.length - 1].active = -1;  
}  
targetElement.appendChild(docFrag);  
}  
this.timerInit = function () {  
s.timers = (!isWin9X ? [setInterval(s.snow, 20)] : [setInterval(s.snow, 75), setInterval(s.snow, 25)]);  
}  
this.init = function () {  
for (var i = 0; i < 2048; i++) {  
s.terrain[i] = 0;  
}  
s.randomizeWind();  
s.createSnow(snowCollect ? flakesMaxActive : flakesMaxActive * 2);  
addEvent(window, 'resize', s.resizeHandler);  
addEvent(window, 'scroll', s.scrollHandler);  
if (!isIE) {  
addEvent(window, 'blur', s.freeze);  
addEvent(window, 'focus', s.resume);  
}  
s.resizeHandler();  
s.scrollHandler();  
if (followMouse) {  
addEvent(document, 'mousemove', s.mouseMove);  
}  
s.timerInit();  
}  
var didInit = false;  
this.start = function (bFromOnLoad) {  
if (!didInit) {  
didInit = true;  
} else if (bFromOnLoad) {  
return true;  
}  
if (typeof targetElement == 'string') {  
targetElement = document.getElementById(targetElement);  
if (!targetElement) throw new Error('Snowstorm: Unable to get targetElement');  
}  
if (!targetElement) {  
targetElement = (!isIE ? (document.documentElement ? document.documentElement : document.body) : document.body);  
}  
if (targetElement != document.documentElement && targetElement != document.body) s.resizeHandler = s.resizeHandlerAlt;  
s.resizeHandler();  
if (screenX && screenY && !s.disabled) {  
s.init();  
s.active = true;  
}  
}  
if (document.addEventListener) {  
document.addEventListener('DOMContentLoaded', function () {  
s.start(true)  
}, false);  
window.addEventListener('load', function () {  
s.start(true)  
}, false);  
} else {  
addEvent(window, 'load', function () {  
s.start(true)  
});  
}  
}  
snowStorm = new SnowStorm();  

5. Code CSS totinh2.css

  
body{  
background-image: url("images/anhnen2.jpg");  
background-repeat: no-repeat;  
background-position: center center;  
background-size: 100%;  
font: 16em/1 Arial;  
}
.text--line {  
font-size: .5em;  
}
svg {  
position: absolute;  
width: auto;  
height: 250px;  
padding:2px;  
border-radius: 20px;
}
.text-copy {  
fill: none;  
stroke: white;  
stroke-dasharray: 7% 28%;  
stroke-width: 3px;  
animation: stroke-offset 4s infinite linear; }  
.text-copy:nth-child(1) {  
stroke: 
# 360745;  
stroke-dashoffset: 7%; }  
.text-copy:nth-child(2) {  
stroke: 
# D61C59;  
stroke-dashoffset: 14%; }  
.text-copy:nth-child(3) {  
stroke: 
# E7D84B;  
stroke-dashoffset: 21%; }  
.text-copy:nth-child(4) {  
stroke: 
# EFEAC5;  
stroke-dashoffset: 28%; }  
.text-copy:nth-child(5) {  
stroke: 
# F8F8FF;  
stroke-dashoffset: 35%; }
@keyframes stroke-offset {  
50% {  
stroke-dashoffset: 35%;  
stroke-dasharray: 0 87.5%; }  
}  
p{  
padding-top: 300px;  
padding-left: 170px;  
}