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Auto readmore không sử dụng javascript cho Blogger

Blogger đã có readmore tuy nhiên nó khá thủ công, với blog đã có nhiều bài viết thì việc tạo readmore cho từng bài là rất vất vả và blogger thường tìm đến với auto readmore javascript.

 Auto readmore javascript thực ra chỉ hiển thị một phần bài viết qua hàm document.write, nội dung cả bài viết vẫn được trình duyệt tải về. Nhược điểm của nó là không thân thiện với các bộ máy tìm kiếm và các công cụ dịch trực tuyến, ngoài ra với bài viết dài nếu không dùng thêm readmore của Blogger thì sẽ gặp lỗi phân trang do Blogger tự ngắt trang. Thủ thuật auto readmore mình giới thiệu sau đây hoàn toàn mới, không sử dụng javascript mà dùng các câu lệnh do chính Blogger cung cấp. Nó sẽ cải thiện tốc độ blog của bạn khi duyệt các trang kiểu index, archive do chỉ tải về trích đoạn nội dung của bài viết.

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<div class='hotline'>
<div class='phonering-alo-phone phonering-alo-green phonering-alo-show' id='phonering-alo-phoneIcon'>
<div class='phonering-alo-ph-circle'/>
<div class='phonering-alo-ph-circle-fill'/>
<div class='phonering-alo-ph-img-circle'>
<a class='pps-btn-img ' href='tel:077.9933.670' title='Liên hệ'>
<img alt='Liên hệ' class='img-responsive' src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiSlXM6gZfbR3c-pHBhJX_UvmUDvc3rJIQ_kTnYwhBQin8oGU-NnD4e_lkDX80uHnAwI0OhSOyS7cv_9VQMwLzVUhMhAhz3hajyfuuFq1agzn1Zkz0s7Hb4kI3OzAAupEeFdPzFXdzTGqqL/s1600/v8TniL3.png' width='50'/>
</a>
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</div>
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<style>
#call {    display: block;
    position: fixed;
    bottom: 15px;
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    z-index: 99;
    border: none;
    outline: none;
    background-color: #e51218;
    color: #fff;
    cursor: pointer;
    padding: 7px 20px 7px 30px;
    border-radius: 0 32px;
    font-weight: 700;
    font-size: 18px;
}
/* HOTLINE */
.phonering-alo-phone {position:fixed;visibility:hidden;background-color:transparent;width:200px;height:200px;
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 -webkit-transform:translateZ(0);
 transition:visibility .5s;
}
.phonering-alo-phone.phonering-alo-show {visibility:visible}
.phonering-alo-phone.phonering-alo-static {opacity:.6}
.phonering-alo-phone.phonering-alo-hover,.phonering-alo-phone:hover {opacity:1}
.phonering-alo-ph-circle {width:140px;height:140px;top:35px;left:35px;position:absolute;
 background-color:transparent;border-radius:100%;border:2px solid rgba(30,30,30,0.4);
 opacity:.1;
 -webkit-animation:phonering-alo-circle-anim 1.2s infinite ease-in-out;
 animation:phonering-alo-circle-anim 1.2s infinite ease-in-out;
 transition:all .5s;
 -webkit-transform-origin:50% 50%;
 -ms-transform-origin:50% 50%;
 transform-origin:50% 50%
}
.phonering-alo-phone.phonering-alo-active .phonering-alo-ph-circle {
    -webkit-animation:phonering-alo-circle-anim 1.1s infinite ease-in-out!important;
    animation:phonering-alo-circle-anim 1.1s infinite ease-in-out!important
}
.phonering-alo-phone.phonering-alo-static .phonering-alo-ph-circle {
    -webkit-animation:phonering-alo-circle-anim 2.2s infinite ease-in-out!important;
    animation:phonering-alo-circle-anim 2.2s infinite ease-in-out!important
}
.phonering-alo-phone.phonering-alo-hover .phonering-alo-ph-circle,.phonering-alo-phone:hover .phonering-alo-ph-circle {
    border-color:red;
    opacity:.5
}
.phonering-alo-phone.phonering-alo-green.phonering-alo-hover .phonering-alo-ph-circle,.phonering-alo-phone.phonering-alo-green:hover .phonering-alo-ph-circle {
    border-color:#5ca038;
    opacity:.5
}
.phonering-alo-phone.phonering-alo-green .phonering-alo-ph-circle {
    border-color:red;
    opacity:.5
}
.phonering-alo-phone.phonering-alo-gray.phonering-alo-hover .phonering-alo-ph-circle,.phonering-alo-phone.phonering-alo-gray:hover .phonering-alo-ph-circle {
    border-color:#ccc;
    opacity:.5
}
.phonering-alo-phone.phonering-alo-gray .phonering-alo-ph-circle {
    border-color:#75eb50;
    opacity:.5
}
.phonering-alo-ph-circle-fill {width:80px;height:80px;top:65px;left:65px;position:absolute;background-color:#000;
 border-radius:100%;border:2px solid transparent;
 -webkit-animation:phonering-alo-circle-fill-anim 2.3s infinite ease-in-out;
 animation:phonering-alo-circle-fill-anim 2.3s infinite ease-in-out;
 transition:all .5s;
 -webkit-transform-origin:50% 50%;
 -ms-transform-origin:50% 50%;
 transform-origin:50% 50%
}
.phonering-alo-phone.phonering-alo-active .phonering-alo-ph-circle-fill {
    -webkit-animation:phonering-alo-circle-fill-anim 1.7s infinite ease-in-out!important;
    animation:phonering-alo-circle-fill-anim 1.7s infinite ease-in-out!important
}
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    -webkit-animation:phonering-alo-circle-fill-anim 2.3s infinite ease-in-out!important;
    animation:phonering-alo-circle-fill-anim 2.3s infinite ease-in-out!important;
    opacity:0!important
}
.phonering-alo-phone.phonering-alo-hover .phonering-alo-ph-circle-fill,.phonering-alo-phone:hover .phonering-alo-ph-circle-fill {
    background-color:rgba(39,45,107,0.5);
    opacity:.75!important
}
.phonering-alo-phone.phonering-alo-green.phonering-alo-hover .phonering-alo-ph-circle-fill,.phonering-alo-phone.phonering-alo-green:hover .phonering-alo-ph-circle-fill {
    background-color:rgba(39,45,107,0.5);
    opacity:.75!important
}
.phonering-alo-phone.phonering-alo-green .phonering-alo-ph-circle-fill {
    background-color:rgba(0,175,242,0.5);
}
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    background-color:rgba(204,204,204,0.5);
    opacity:.75!important
}
.phonering-alo-phone.phonering-alo-gray .phonering-alo-ph-circle-fill {
    background-color:rgba(117,235,80,0.5);
    opacity:.75!important
}
.phonering-alo-ph-img-circle {
    width:50px;
    height:50px;
    top:80px;
    left:80px;
    position:absolute;
    background:rgba(30,30,30,0.1) url(data:image/png;base64,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) no-repeat center center;
    border-radius:100%;
    border:2px solid transparent;
    -webkit-animation:phonering-alo-circle-img-anim 1s infinite ease-in-out;
    animation:phonering-alo-circle-img-anim 1s infinite ease-in-out;
    -webkit-transform-origin:50% 50%;
    -ms-transform-origin:50% 50%;
    transform-origin:50% 50%
}
.phonering-alo-phone.phonering-alo-active .phonering-alo-ph-img-circle {
    -webkit-animation:phonering-alo-circle-img-anim 1s infinite ease-in-out!important;
    animation:phonering-alo-circle-img-anim 1s infinite ease-in-out!important
}
.phonering-alo-phone.phonering-alo-static .phonering-alo-ph-img-circle {
    -webkit-animation:phonering-alo-circle-img-anim 0 infinite ease-in-out!important;
    animation:phonering-alo-circle-img-anim 0 infinite ease-in-out!important
}
.phonering-alo-phone.phonering-alo-hover .phonering-alo-ph-img-circle,.phonering-alo-phone:hover .phonering-alo-ph-img-circle {
    background-color:red;
}
.phonering-alo-phone.phonering-alo-green.phonering-alo-hover .phonering-alo-ph-img-circle,.phonering-alo-phone.phonering-alo-green:hover .phonering-alo-ph-img-circle {
    background-color:#5ca038;
}
.phonering-alo-phone.phonering-alo-green .phonering-alo-ph-img-circle {
    background-color:red;
}
.phonering-alo-phone.phonering-alo-gray.phonering-alo-hover .phonering-alo-ph-img-circle,.phonering-alo-phone.phonering-alo-gray:hover .phonering-alo-ph-img-circle {
    background-color:#ccc;
}
.phonering-alo-phone.phonering-alo-gray .phonering-alo-ph-img-circle {
    background-color:#75eb50
}
@-webkit-keyframes phonering-alo-circle-anim {
    0% {
        -webkit-transform:rotate(0) scale(.5) skew(1deg);
        -webkit-opacity:.1
    }
    30% {
        -webkit-transform:rotate(0) scale(.7) skew(1deg);
        -webkit-opacity:.5
    }
    100% {
        -webkit-transform:rotate(0) scale(1) skew(1deg);
        -webkit-opacity:.1
    }
}
@-webkit-keyframes phonering-alo-circle-fill-anim {
    0% {
        -webkit-transform:rotate(0) scale(.7) skew(1deg);
        opacity:.2
    }
    50% {
        -webkit-transform:rotate(0) scale(1) skew(1deg);
        opacity:.2
    }
    100% {
        -webkit-transform:rotate(0) scale(.7) skew(1deg);
        opacity:.2
    }
}
@-webkit-keyframes phonering-alo-circle-img-anim {
    0% {
        -webkit-transform:rotate(0) scale(1) skew(1deg)
    }
    10% {
        -webkit-transform:rotate(-25deg) scale(1) skew(1deg)
    }
    20% {
        -webkit-transform:rotate(25deg) scale(1) skew(1deg)
    }
    30% {
        -webkit-transform:rotate(-25deg) scale(1) skew(1deg)
    }
    40% {
        -webkit-transform:rotate(25deg) scale(1) skew(1deg)
    }
    50% {
        -webkit-transform:rotate(0) scale(1) skew(1deg)
    }
    100% {
        -webkit-transform:rotate(0) scale(1) skew(1deg)
    }
}
@-webkit-keyframes phonering-alo-circle-anim {
    0% {
        -webkit-transform:rotate(0) scale(.5) skew(1deg);
                transform:rotate(0) scale(.5) skew(1deg);
        opacity:.1
    }
    30% {
        -webkit-transform:rotate(0) scale(.7) skew(1deg);
                transform:rotate(0) scale(.7) skew(1deg);
        opacity:.5
    }
    100% {
        -webkit-transform:rotate(0) scale(1) skew(1deg);
                transform:rotate(0) scale(1) skew(1deg);
        opacity:.1
    }
}
@keyframes phonering-alo-circle-anim {
    0% {
        -webkit-transform:rotate(0) scale(.5) skew(1deg);
                transform:rotate(0) scale(.5) skew(1deg);
        opacity:.1
    }
    30% {
        -webkit-transform:rotate(0) scale(.7) skew(1deg);
                transform:rotate(0) scale(.7) skew(1deg);
        opacity:.5
    }
    100% {
        -webkit-transform:rotate(0) scale(1) skew(1deg);
                transform:rotate(0) scale(1) skew(1deg);
        opacity:.1
    }
}
@-webkit-keyframes phonering-alo-circle-fill-anim {
    0% {
        -webkit-transform:rotate(0) scale(.7) skew(1deg);
                transform:rotate(0) scale(.7) skew(1deg);
        opacity:.2
    }
    50% {
        -webkit-transform:rotate(0) scale(1) skew(1deg);
                transform:rotate(0) scale(1) skew(1deg);
        opacity:.2
    }
    100% {
        -webkit-transform:rotate(0) scale(.7) skew(1deg);
                transform:rotate(0) scale(.7) skew(1deg);
        opacity:.2
    }
}
@keyframes phonering-alo-circle-fill-anim {
    0% {
        -webkit-transform:rotate(0) scale(.7) skew(1deg);
                transform:rotate(0) scale(.7) skew(1deg);
        opacity:.2
    }
    50% {
        -webkit-transform:rotate(0) scale(1) skew(1deg);
                transform:rotate(0) scale(1) skew(1deg);
        opacity:.2
    }
    100% {
        -webkit-transform:rotate(0) scale(.7) skew(1deg);
                transform:rotate(0) scale(.7) skew(1deg);
        opacity:.2
    }
}
@-webkit-keyframes phonering-alo-circle-img-anim {
    0% {
        -webkit-transform:rotate(0) scale(1) skew(1deg);
                transform:rotate(0) scale(1) skew(1deg)
    }
    10% {
        -webkit-transform:rotate(-25deg) scale(1) skew(1deg);
                transform:rotate(-25deg) scale(1) skew(1deg)
    }
    20% {
        -webkit-transform:rotate(25deg) scale(1) skew(1deg);
                transform:rotate(25deg) scale(1) skew(1deg)
    }
    30% {
        -webkit-transform:rotate(-25deg) scale(1) skew(1deg);
                transform:rotate(-25deg) scale(1) skew(1deg)
    }
    40% {
        -webkit-transform:rotate(25deg) scale(1) skew(1deg);
                transform:rotate(25deg) scale(1) skew(1deg)
    }
    50% {
        -webkit-transform:rotate(0) scale(1) skew(1deg);
                transform:rotate(0) scale(1) skew(1deg)
    }
    100% {
        -webkit-transform:rotate(0) scale(1) skew(1deg);
                transform:rotate(0) scale(1) skew(1deg)
    }
}
@keyframes phonering-alo-circle-img-anim {
    0% {
        -webkit-transform:rotate(0) scale(1) skew(1deg);
                transform:rotate(0) scale(1) skew(1deg)
    }
    10% {
        -webkit-transform:rotate(-25deg) scale(1) skew(1deg);
                transform:rotate(-25deg) scale(1) skew(1deg)
    }
    20% {
        -webkit-transform:rotate(25deg) scale(1) skew(1deg);
                transform:rotate(25deg) scale(1) skew(1deg)
    }
    30% {
        -webkit-transform:rotate(-25deg) scale(1) skew(1deg);
                transform:rotate(-25deg) scale(1) skew(1deg)
    }
    40% {
        -webkit-transform:rotate(25deg) scale(1) skew(1deg);
                transform:rotate(25deg) scale(1) skew(1deg)
    }
    50% {
        -webkit-transform:rotate(0) scale(1) skew(1deg);
                transform:rotate(0) scale(1) skew(1deg)
    }
    100% {
        -webkit-transform:rotate(0) scale(1) skew(1deg);
                transform:rotate(0) scale(1) skew(1deg)
    }
}
</style>
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