"page transition effects "
Bootstrap 4.1.1 Snippet by ALIMUL AL RAZY

<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="m-page--transition"></div> <button class="btn-r btn-1">reverse</button> <button class="btn-p btn-1">play</button> <script src="https://cdn.jsdelivr.net/npm/bezier-easing@2.0.3/src/index.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.20.4/TweenMax.min.js"></script> <script> /** * https://github.com/gre/bezier-easing * BezierEasing - use bezier curve for transition easing function * by Gaëtan Renaudeau 2014 - 2015 – MIT License */ // These values are established by empiricism with tests (tradeoff: performance VS precision) var NEWTON_ITERATIONS = 4; var NEWTON_MIN_SLOPE = 0.001; var SUBDIVISION_PRECISION = 0.0000001; var SUBDIVISION_MAX_ITERATIONS = 10; var kSplineTableSize = 11; var kSampleStepSize = 1.0 / (kSplineTableSize - 1.0); var float32ArraySupported = typeof Float32Array === 'function'; function A (aA1, aA2) { return 1.0 - 3.0 * aA2 + 3.0 * aA1; } function B (aA1, aA2) { return 3.0 * aA2 - 6.0 * aA1; } function C (aA1) { return 3.0 * aA1; } // Returns x(t) given t, x1, and x2, or y(t) given t, y1, and y2. function calcBezier (aT, aA1, aA2) { return ((A(aA1, aA2) * aT + B(aA1, aA2)) * aT + C(aA1)) * aT; } // Returns dx/dt given t, x1, and x2, or dy/dt given t, y1, and y2. function getSlope (aT, aA1, aA2) { return 3.0 * A(aA1, aA2) * aT * aT + 2.0 * B(aA1, aA2) * aT + C(aA1); } function binarySubdivide (aX, aA, aB, mX1, mX2) { var currentX, currentT, i = 0; do { currentT = aA + (aB - aA) / 2.0; currentX = calcBezier(currentT, mX1, mX2) - aX; if (currentX > 0.0) { aB = currentT; } else { aA = currentT; } } while (Math.abs(currentX) > SUBDIVISION_PRECISION && ++i < SUBDIVISION_MAX_ITERATIONS); return currentT; } function newtonRaphsonIterate (aX, aGuessT, mX1, mX2) { for (var i = 0; i < NEWTON_ITERATIONS; ++i) { var currentSlope = getSlope(aGuessT, mX1, mX2); if (currentSlope === 0.0) { return aGuessT; } var currentX = calcBezier(aGuessT, mX1, mX2) - aX; aGuessT -= currentX / currentSlope; } return aGuessT; } function BezierEasing (mX1, mY1, mX2, mY2) { if (!(0 <= mX1 && mX1 <= 1 && 0 <= mX2 && mX2 <= 1)) { throw new Error('bezier x values must be in [0, 1] range'); } // Precompute samples table var sampleValues = float32ArraySupported ? new Float32Array(kSplineTableSize) : new Array(kSplineTableSize); if (mX1 !== mY1 || mX2 !== mY2) { for (var i = 0; i < kSplineTableSize; ++i) { sampleValues[i] = calcBezier(i * kSampleStepSize, mX1, mX2); } } function getTForX (aX) { var intervalStart = 0.0; var currentSample = 1; var lastSample = kSplineTableSize - 1; for (; currentSample !== lastSample && sampleValues[currentSample] <= aX; ++currentSample) { intervalStart += kSampleStepSize; } --currentSample; // Interpolate to provide an initial guess for t var dist = (aX - sampleValues[currentSample]) / (sampleValues[currentSample + 1] - sampleValues[currentSample]); var guessForT = intervalStart + dist * kSampleStepSize; var initialSlope = getSlope(guessForT, mX1, mX2); if (initialSlope >= NEWTON_MIN_SLOPE) { return newtonRaphsonIterate(aX, guessForT, mX1, mX2); } else if (initialSlope === 0.0) { return guessForT; } else { return binarySubdivide(aX, intervalStart, intervalStart + kSampleStepSize, mX1, mX2); } } return function (x) { if (mX1 === mY1 && mX2 === mY2) { return x; // linear } // Because JavaScript number are imprecise, we should guarantee the extremes are right. if (x === 0) { return 0; } if (x === 1) { return 1; } return calcBezier(getTForX(x), mY1, mY2); }; }; var tl = new TimelineLite({ paused:true }); var el = document.querySelector('.m-page--transition'); var play = document.querySelector('.btn-p'); var reverse = document.querySelector('.btn-r'); var easing = BezierEasing(0.645, 0.045, 0.355, 1); tl.to(el, 0.7, { left: 0, ease: easing }) .to(el, 0.7, { left: '-100%', ease: easing, delay: 0.3, onComplete: finish }); function finish() { console.log('finish'); } reverse.addEventListener('click', function() { tl.reverse(); }) play.addEventListener('click', function() { tl.play(); }) </script>
/** * index.scss * - Add any styles you want here! */ body, html { background: #0e83cd; margin: 0; padding: 0; font-family: "Lato", sans-serif; display: flex; align-items: center; height: 100%; justify-content: center; } .m-page--transition { background-color: #7cbdff; height: 100%; width: 100%; position: fixed; left: 100%; } .btn-1 { border: 3px solid #fff; color: #fff; } .btn-1:hover { color: #0e83cd; background: #fff; } button { border: none; font-family: inherit; font-size: inherit; color: inherit; background: none; cursor: pointer; padding: 25px 80px; display: inline-block; margin: 15px 30px; text-transform: uppercase; letter-spacing: 1px; font-weight: 700; outline: none; position: relative; transition: all 0.3s; }

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