I Love You Using HTML and CSS Code

Hendradian Mei 25, 2024

  



Halo Coder. Kali ini, kita akan belajar cara membuat I Love You (Animasi Hati) dengan menggunakan kode HTML dan CSS. Dengan Proyek Situs Web I Love You ini, Anda dapat mengirimkan kode kepada Gebetan anda atau orang lain.
I Love You (animasi hati) adalah kodefrontend sederhana di mana kita akan menggunakan elemen HTML untuk membuat struktur untuk hati kita dan konsep animasi dan keyframe CSS untuk menambahkan animasi hati dengan teks I Love You. Kemudian, dengan menggunakan JavaScript, tambahkan animasi berkelanjutan di dalam proyek. Oke langsung saja kita mulai dengan kode HTML nya dan CSS & JS....

Html Code For Heart Animation:

   
   <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>I Love You animation Using HTML and CSS</title>
        <link rel="stylesheet" href="style.css">
    </head>
    <body>
    <canvas id="canvas" width="1400" height="600">
    </canvas>

    <!-- js here -->
        <script src="app.js"></script>
    </body>
    </html>


CSS :

body {
background-color: #000;
margin: 0;
overflow: hidden;
background-repeat: no-repeat;
}


JS:
var canvas = document.getElementById("canvas");
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
// Initialize the GL context
var gl = canvas.getContext('webgl');
if(!gl){
console.error("Unable to initialize WebGL.");
}
//Time
var time = 0.0;
//************** Shader sources **************
var vertexSource = `
attribute vec2 position;
void main() {
gl_Position = vec4(position, 0.0, 1.0);
}
`;
var fragmentSource = `
precision highp float;
uniform float width;
uniform float height;
vec2 resolution = vec2(width, height);
uniform float time;
#define POINT_COUNT 8
vec2 points[POINT_COUNT];
const float speed = -0.5;
const float len = 0.25;
float intensity = 1.3;
float radius = 0.008;
//https://www.shadertoy.com/view/MlKcDD
//Signed distance to a quadratic bezier
float sdBezier(vec2 pos, vec2 A, vec2 B, vec2 C){
vec2 a = B - A;
vec2 b = A - 2.0*B + C;
vec2 c = a * 2.0;
vec2 d = A - pos;
float kk = 1.0 / dot(b,b);
float kx = kk * dot(a,b);
float ky = kk * (2.0*dot(a,a)+dot(d,b)) / 3.0;
float kz = kk * dot(d,a);
float res = 0.0;
float p = ky - kx*kx;
float p3 = p*p*p;
float q = kx*(2.0*kx*kx - 3.0*ky) + kz;
float h = q*q + 4.0*p3;
if(h >= 0.0){
h = sqrt(h);
vec2 x = (vec2(h, -h) - q) / 2.0;
vec2 uv = sign(x)*pow(abs(x), vec2(1.0/3.0));
float t = uv.x + uv.y - kx;
t = clamp( t, 0.0, 1.0 );
// 1 root
vec2 qos = d + (c + b*t)*t;
res = length(qos);
}else{
float z = sqrt(-p);
float v = acos( q/(p*z*2.0) ) / 3.0;
float m = cos(v);
float n = sin(v)*1.732050808;
vec3 t = vec3(m + m, -n - m, n - m) * z - kx;
t = clamp( t, 0.0, 1.0 );
// 3 roots
vec2 qos = d + (c + b*t.x)*t.x;
float dis = dot(qos,qos);
res = dis;
qos = d + (c + b*t.y)*t.y;
dis = dot(qos,qos);
res = min(res,dis);
qos = d + (c + b*t.z)*t.z;
dis = dot(qos,qos);
res = min(res,dis);
res = sqrt( res );
}
return res;
}
//http://mathworld.wolfram.com/HeartCurve.html
vec2 getHeartPosition(float t){
return vec2(16.0 * sin(t) * sin(t) * sin(t),
-(13.0 * cos(t) - 5.0 * cos(2.0*t)
- 2.0 * cos(3.0*t) - cos(4.0*t)));
}
//https://www.shadertoy.com/view/3s3GDn
float getGlow(float dist, float radius, float intensity){
return pow(radius/dist, intensity);
}
float getSegment(float t, vec2 pos, float offset, float scale){
for(int i = 0; i < POINT_COUNT; i++){
points[i] = getHeartPosition(offset + float(i)*len + fract(speed * t) * 6.28);
}
vec2 c = (points[0] + points[1]) / 2.0;
vec2 c_prev;
float dist = 10000.0;
for(int i = 0; i < POINT_COUNT-1; i++){
//https://tinyurl.com/y2htbwkm
c_prev = c;
c = (points[i] + points[i+1]) / 2.0;
dist = min(dist, sdBezier(pos, scale * c_prev, scale * points[i], scale * c));
}
return max(0.0, dist);
}
void main(){
vec2 uv = gl_FragCoord.xy/resolution.xy;
float widthHeightRatio = resolution.x/resolution.y;
vec2 centre = vec2(0.5, 0.5);
vec2 pos = centre - uv;
pos.y /= widthHeightRatio;
//Shift upwards to centre heart
pos.y += 0.02;
float scale = 0.000015 * height;
float t = time;
//Get first segment
float dist = getSegment(t, pos, 0.0, scale);
float glow = getGlow(dist, radius, intensity);
vec3 col = vec3(0.0);
//White core
col += 10.0*vec3(smoothstep(0.003, 0.001, dist));
//Pink glow
col += glow * vec3(1.0,0.05,0.3);
//Get second segment
dist = getSegment(t, pos, 3.4, scale);
glow = getGlow(dist, radius, intensity);
//White core
col += 10.0*vec3(smoothstep(0.003, 0.001, dist));
//Blue glow
col += glow * vec3(0.1,0.4,1.0);
//Tone mapping
col = 1.0 - exp(-col);
//Gamma
col = pow(col, vec3(0.4545));
//Output to screen
gl_FragColor = vec4(col,1.0);
}
`;
//************** Utility functions **************
window.addEventListener('resize', onWindowResize, false);
function onWindowResize(){
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
gl.viewport(0, 0, canvas.width, canvas.height);
gl.uniform1f(widthHandle, window.innerWidth);
gl.uniform1f(heightHandle, window.innerHeight);
}
//Compile shader and combine with source
function compileShader(shaderSource, shaderType){
var shader = gl.createShader(shaderType);
gl.shaderSource(shader, shaderSource);
gl.compileShader(shader);
if(!gl.getShaderParameter(shader, gl.COMPILE_STATUS)){
throw "Shader compile failed with: " + gl.getShaderInfoLog(shader);
}
return shader;
}
//From https://codepen.io/jlfwong/pen/GqmroZ
//Utility to complain loudly if we fail to find the attribute/uniform
function getAttribLocation(program, name) {
var attributeLocation = gl.getAttribLocation(program, name);
if (attributeLocation === -1) {
throw 'Cannot find attribute ' + name + '.';
}
return attributeLocation;
}
function getUniformLocation(program, name) {
var attributeLocation = gl.getUniformLocation(program, name);
if (attributeLocation === -1) {
throw 'Cannot find uniform ' + name + '.';
}
return attributeLocation;
}
//************** Create shaders **************
//Create vertex and fragment shaders
var vertexShader = compileShader(vertexSource, gl.VERTEX_SHADER);
var fragmentShader = compileShader(fragmentSource, gl.FRAGMENT_SHADER);
//Create shader programs
var program = gl.createProgram();
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);
gl.linkProgram(program);
gl.useProgram(program);
//Set up rectangle covering entire canvas
var vertexData = new Float32Array([
-1.0, 1.0, // top left
-1.0, -1.0, // bottom left
1.0, 1.0, // top right
1.0, -1.0, // bottom right
]);
//Create vertex buffer
var vertexDataBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vertexDataBuffer);
gl.bufferData(gl.ARRAY_BUFFER, vertexData, gl.STATIC_DRAW);
// Layout of our data in the vertex buffer
var positionHandle = getAttribLocation(program, 'position');
gl.enableVertexAttribArray(positionHandle);
gl.vertexAttribPointer(positionHandle,
2, // position is a vec2 (2 values per component)
gl.FLOAT, // each component is a float
false, // don't normalize values
2 * 4, // two 4 byte float components per vertex (32 bit float is 4 bytes)
0 // how many bytes inside the buffer to start from
);
//Set uniform handle
var timeHandle = getUniformLocation(program, 'time');
var widthHandle = getUniformLocation(program, 'width');
var heightHandle = getUniformLocation(program, 'height');
gl.uniform1f(widthHandle, window.innerWidth);
gl.uniform1f(heightHandle, window.innerHeight);
var lastFrame = Date.now();
var thisFrame;
function draw(){
//Update time
thisFrame = Date.now();
time += (thisFrame - lastFrame)/1000;
lastFrame = thisFrame;
//Send uniforms to program
gl.uniform1f(timeHandle, time);
//Draw a triangle strip connecting vertices 0-4
gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
requestAnimationFrame(draw);
}
draw();

Berikut adalah hasil yang telah kami perbarui dengan JavaScript. Semoga Anda dapat melihat output dan tangkapan layar kode. Lihat web kami yang lain dan dapatkan pengetahuan dalam pengembangan front-end.






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