SOURCE

window.onload = function() {
    var missDiv = document.querySelector('.miss');
    var clickCount = -1;
    document.onclick = function() {
        clickCount++;
        missDiv.style.transitionDelay = 0;
        missDiv.style.opacity = 0;
        setTimeout(function() {
            missDiv.innerText = clickCount % 2 == 0 ? '想你' : '喜欢你';
            missDiv.style.transitionDelay = 0.5;
            missDiv.style.opacity = 1;
        }, 500);
    }
    document.onclick();
}

<div class="miss"></div>

html,body {
    height: 100%;
    text-align: center;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    position: relative;
    font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
    -webkit-font-smoothing: antialiased;
    cursor: pointer;
    user-select: none;
    overflow: hidden;
}

.miss {
    color: rgb(218, 27, 218);
    text-shadow: 0px 0px 2px rgba(241, 106, 241, 0.3);
    font-size: 20px;
    font-weight: bold;
    transition: all 0.5s ease-out;
    letter-spacing: 2px;
}

.miss:hover {
    font-size: 40px;
}