如何在jQuery或VanillaJS中夹紧/松开文本块

Question

我不知道如何在jQuery或VanillaJS中执行以下操作。

对于下面的布局，我想做以下操作：

1. 使用多夹钳库将每个文本块压缩为三(3(行
2. 当你点击"；阅读更多"；按钮或在块本身上；展开"；(松开(完全

"use strict";!function(t,e){"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?module.exports=e():t.MultiClamp=t.MultiClamp||e()}(this,function(){function a(t){return parseInt(t,10)}function l(t){return(t+"").replace(/[^d.]/g,"")-0}function h(t){return Math.round(100*t)/100}function m(t,e){return"textContent"in t?t.textContent=e:t.innerText=e}function o(t,e){return window.getComputedStyle?window.getComputedStyle(t,null).getPropertyValue(e):t.currentStyle.getAttribute(e.replace(/-(w)/g,function(t,e){return e.toUpperCase()}))}function c(t){var e=o(t,"height");return-1<e.indexOf("px")?l(e):h(l(t.clientHeight)-l(o(t,"padding-top"))-l(o(t,"padding-bottom")))}var t=function(t,e){t&&(this.element=t.length?t[0]:t,this.originalOption=e||{},this.originalElement=this.element.cloneNode(!0),this.preInit(this.originalOption),this.init())};return t.prototype={constructor:t,reload:function(t){if(t){if(t.useOriginalText&&(this.element.innerHTML=this.originalElement.innerHTML),"-webkit-box"===this.element.style.display)for(var e=["display","overflow","WebkitLineClamp","WebkitBoxOrient"],i=0;i<e.length;i++)this.element.style[e[i]]=this.originalElement.style[e[i]];var n={};for(var l in this.originalOption)n[l]=this.originalOption[l];for(var o in t)n[o]=t[o];this.preInit(n)}this.init()},preInit:function(t){if(this.option={ellipsis:"ellipsis"in t?t.ellipsis:"...",clamp:"clamp"in t?t.clamp:3,reverse:"reverse"in t&&!!t.reverse,splitByWords:"splitByWords"in t&&!!t.splitByWords,disableCssClamp:"disableCssClamp"in t&&!!t.disableCssClamp,onClampStart:"onClampStart"in t&&"function"==typeof t.onClampStart?t.onClampStart:function(){},onClampEnd:"onClampEnd"in t&&"function"==typeof t.onClampEnd?t.onClampEnd:function(){}},"lineTextLen"in t&&(this.option.lineTextLen=t.lineTextLen),"auto"===this.option.clamp)this.autoClamp=!0;else{if(this.option.clamp=a(this.option.clamp),isNaN(this.option.clamp)||this.option.clamp<1)throw new Error("Invaild clamp number!");this.autoClamp=!1}this.useCssClamp=!(this.option.disableCssClamp||this.autoClamp||this.option.reverse||this.option.splitByWords||"..."!==this.option.ellipsis||void 0===document.body.style.webkitLineClamp)},init:function(){if(this.useCssClamp){var t={display:"-webkit-box",overflow:"hidden",WebkitLineClamp:this.option.clamp,WebkitBoxOrient:"vertical"};for(var e in t)this.element.style[e]=t[e]}else this.contentText="textContent"in(i=this.element)?i.textContent:i.innerText,this.ellipsis=function(t){if(/^<[wW]+>$/.test(t)){var e=document.createElement("div");return e.innerHTML=t,e.firstElementChild||e.firstChild}return t}(this.option.ellipsis),this.clamp();var i},getSingleLineHeight:function(){var t=o(this.element,"line-height"),i=this;if(-1<t.indexOf("px"))return l(t);if(isNaN(t))return n();var e=o(this.element,"font-size");return-1<e.indexOf("px")?h(l(e)*t):-1<e.indexOf("pt")?h(4*l(e)/3*t):n();function n(){var t=i.element.innerHTML;i.element.innerHTML=".";var e=c(i.element);return i.element.innerHTML=t,e}},clamp:function(){var t,e,i,n,l=this;if(t=this.getSingleLineHeight(),""!==this.contentText&&t){if(this.autoClamp?(i=c(this.element),this.option.clamp=a(i/t),n=this.element.style.height,this.element.style.height="auto"):i=h(t*this.option.clamp),!(e=c(this.element))||!i||e<=i)return this.autoClamp&&(this.element.style.height=n),void p();var o=this.option.onClampStart.call(this,{needClamp:!0});if(void 0===o||o){var s=this.option.splitByWords?this.contentText.match(/w+|W+?/g):this.contentText,r=a(this.option.lineTextLen||Math.min(20,this.contentText.length/this.option.clamp))*this.option.clamp;this.trunkSlice(s,i,r,r,!1),this.autoClamp&&(this.element.style.height=n),this.option.onClampEnd.call(this,{didClamp:!0})}else this.autoClamp&&(this.element.style.height=n),p(!0)}else p();function p(t){t||l.option.onClampStart.call(l,{needClamp:!1}),l.option.onClampEnd.call(l,{didClamp:!1})}},trunkSlice:function(t,e,i,n,l){var o,s=this,r=this.option.reverse?t.slice(t.length-n):t.slice(0,n);if(p(this.option.splitByWords?r.join(""):r),c(this.element)>e)o=l?i:a(i/2)||1,this.trunkSlice(t,e,o,n-o,!0);else{if(1===i&&l)return void(this.option.splitByWords&&/s/.test(r[this.option.reverse?0:r.length-1])?p((this.option.reverse?r.slice(1):r.slice(0,r.length-1)).join(""),!0):p(this.option.splitByWords?r.join(""):r,!0));o=l?a(i/2)||1:i,this.trunkSlice(t,e,o,n+o,!1)}function p(t,e){"object"==typeof s.ellipsis?(m(s.element,t),s.option.reverse?s.element.insertBefore(e?s.ellipsis:s.ellipsis.cloneNode(!0),s.element.firstChild):s.element.appendChild(e?s.ellipsis:s.ellipsis.cloneNode(!0))):s.option.reverse?m(s.element,s.ellipsis+t):m(s.element,t+s.ellipsis)}}},t});
$("#info .descr").each(function(i, obj) {
new MultiClamp(obj, {
ellipsis: '...',
clamp: 3
});
});

* {
margin: 0;
padding: 0;
}
.container {
max-width: 480px;
margin: 10px auto;
padding: 0;
width: 100%;
}
.container:after,
.container:before {
display: table;
content: " ";
}
.row {
margin-bottom: 10px;
}
.row:after {
content: '';
display: block;
height: 0;
clear: both;
}
.col {
display: inline;
float: left;
margin: 0 5px;
width: 100%;
max-width: 150px;
text-align: left;
}
a {
color: #000000;
text-decoration: none;
}
.wrap {
position: relative;
min-height: 100%;
padding: 10px 10px 10px;
-webkit-box-sizing: border-box;
box-sizing: border-box;
background-color: yellow;
}
h3 {
margin-bottom: 10px;
}
.btn {
margin-top: 10px;
background-color: #000000;
color: #ffffff;
display: inline-block;
padding: 5px 10px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>^
<div id="info" class="container">
<div class="row">
<div class="col">
<a href="#">
<div class="wrap">
<h3>Heading 1</h3>
<div class="descr">
Lorem ipsum dolor sit amet<br />
Morbi hendrerit justo non<br />
Mauris et ligula efficitur<br />
Suspendisse eget nulla lobortis<br />
Proin vel quam ornare, commodo sem<br />
Suspendisse luctus nisi nec<br />
Nullam volutpat mi ut metus rutrum<br />
Fusce vehicula ipsum in mauris<br />
Suspendisse consequat leo
</div>
<div class="btn">
Read More
</div>
</div>
</a>
</div>
<div class="col">
<a href="#">
<div class="wrap">
<h3>Heading 2</h3>
<div class="descr">
Lorem ipsum dolor sit amet<br />
Morbi hendrerit justo non<br />
Mauris et ligula efficitur<br />
Suspendisse eget nulla lobortis
</div>
<div class="btn">
Read More
</div>
</div>
</a>
</div>
<div class="col">
<a href="#">
<div class="wrap">
<h3>Heading 3</h3>
<div class="descr">
Lorem ipsum dolor sit amet<br />
Morbi hendrerit justo non<br />
Mauris et ligula efficitur<br />
Suspendisse eget nulla lobortis<br />
Proin vel quam ornare, commodo sem<br />
Suspendisse luctus nisi nec<br />
Nullam volutpat mi ut metus rutrum<br />
Fusce vehicula ipsum in mauris
</div>
<div class="btn">
Read More
</div>
</div>
</a>
</div>
</div>
<div class="row">
<div class="col">
<a href="#">
<div class="wrap">
<h3>Heading 4</h3>
<div class="descr">
Lorem ipsum dolor sit amet<br />
Morbi hendrerit justo non<br />
Mauris et ligula efficitur<br />
Suspendisse eget nulla lobortis<br />
Proin vel quam ornare, commodo sem
</div>
<div class="btn">
Read More
</div>
</div>
</a>
</div>
<div class="col">
<a href="#">
<div class="wrap">
<h3>Heading 5</h3>
<div class="descr">
Lorem ipsum dolor sit amet<br />
Morbi hendrerit justo non<br />
Mauris et ligula efficitur<br />
Suspendisse eget nulla lobortis<br />
Proin vel quam ornare, commodo sem<br />
Suspendisse luctus nisi nec<br />
Nullam volutpat mi ut metus rutrum<br />
Fusce vehicula ipsum in mauris
</div>
<div class="btn">
Read More
</div>
</div>
</a>
</div>
<div class="col">
<a href="#">
<div class="wrap">
<h3>Heading 6</h3>
<div class="descr">
Lorem ipsum dolor sit amet<br />
Morbi hendrerit justo non<br />
Mauris et ligula efficitur
</div>
<div class="btn">
Read More
</div>
</div>
</a>
</div>
</div>
</div>

到目前为止，我只知道如何将每个块压缩为三行：

$("#info .descr").each(function(i, obj) {
new MultiClamp(obj, {
ellipsis: '...',
clamp: 3
});
});

Answer 1

您可以使用reload(options)方法来实现这一点。

reload(options)

重新加载时可以更改初始选项通过选项param，并使用原始文本在options.useOriginalText设置为true。默认值：｛…initOptions，useOriginalText:false}

试试这个

"use strict";!function(t,e){"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?module.exports=e():t.MultiClamp=t.MultiClamp||e()}(this,function(){function a(t){return parseInt(t,10)}function l(t){return(t+"").replace(/[^d.]/g,"")-0}function h(t){return Math.round(100*t)/100}function m(t,e){return"textContent"in t?t.textContent=e:t.innerText=e}function o(t,e){return window.getComputedStyle?window.getComputedStyle(t,null).getPropertyValue(e):t.currentStyle.getAttribute(e.replace(/-(w)/g,function(t,e){return e.toUpperCase()}))}function c(t){var e=o(t,"height");return-1<e.indexOf("px")?l(e):h(l(t.clientHeight)-l(o(t,"padding-top"))-l(o(t,"padding-bottom")))}var t=function(t,e){t&&(this.element=t.length?t[0]:t,this.originalOption=e||{},this.originalElement=this.element.cloneNode(!0),this.preInit(this.originalOption),this.init())};return t.prototype={constructor:t,reload:function(t){if(t){if(t.useOriginalText&&(this.element.innerHTML=this.originalElement.innerHTML),"-webkit-box"===this.element.style.display)for(var e=["display","overflow","WebkitLineClamp","WebkitBoxOrient"],i=0;i<e.length;i++)this.element.style[e[i]]=this.originalElement.style[e[i]];var n={};for(var l in this.originalOption)n[l]=this.originalOption[l];for(var o in t)n[o]=t[o];this.preInit(n)}this.init()},preInit:function(t){if(this.option={ellipsis:"ellipsis"in t?t.ellipsis:"...",clamp:"clamp"in t?t.clamp:3,reverse:"reverse"in t&&!!t.reverse,splitByWords:"splitByWords"in t&&!!t.splitByWords,disableCssClamp:"disableCssClamp"in t&&!!t.disableCssClamp,onClampStart:"onClampStart"in t&&"function"==typeof t.onClampStart?t.onClampStart:function(){},onClampEnd:"onClampEnd"in t&&"function"==typeof t.onClampEnd?t.onClampEnd:function(){}},"lineTextLen"in t&&(this.option.lineTextLen=t.lineTextLen),"auto"===this.option.clamp)this.autoClamp=!0;else{if(this.option.clamp=a(this.option.clamp),isNaN(this.option.clamp)||this.option.clamp<1)throw new Error("Invaild clamp number!");this.autoClamp=!1}this.useCssClamp=!(this.option.disableCssClamp||this.autoClamp||this.option.reverse||this.option.splitByWords||"..."!==this.option.ellipsis||void 0===document.body.style.webkitLineClamp)},init:function(){if(this.useCssClamp){var t={display:"-webkit-box",overflow:"hidden",WebkitLineClamp:this.option.clamp,WebkitBoxOrient:"vertical"};for(var e in t)this.element.style[e]=t[e]}else this.contentText="textContent"in(i=this.element)?i.textContent:i.innerText,this.ellipsis=function(t){if(/^<[wW]+>$/.test(t)){var e=document.createElement("div");return e.innerHTML=t,e.firstElementChild||e.firstChild}return t}(this.option.ellipsis),this.clamp();var i},getSingleLineHeight:function(){var t=o(this.element,"line-height"),i=this;if(-1<t.indexOf("px"))return l(t);if(isNaN(t))return n();var e=o(this.element,"font-size");return-1<e.indexOf("px")?h(l(e)*t):-1<e.indexOf("pt")?h(4*l(e)/3*t):n();function n(){var t=i.element.innerHTML;i.element.innerHTML=".";var e=c(i.element);return i.element.innerHTML=t,e}},clamp:function(){var t,e,i,n,l=this;if(t=this.getSingleLineHeight(),""!==this.contentText&&t){if(this.autoClamp?(i=c(this.element),this.option.clamp=a(i/t),n=this.element.style.height,this.element.style.height="auto"):i=h(t*this.option.clamp),!(e=c(this.element))||!i||e<=i)return this.autoClamp&&(this.element.style.height=n),void p();var o=this.option.onClampStart.call(this,{needClamp:!0});if(void 0===o||o){var s=this.option.splitByWords?this.contentText.match(/w+|W+?/g):this.contentText,r=a(this.option.lineTextLen||Math.min(20,this.contentText.length/this.option.clamp))*this.option.clamp;this.trunkSlice(s,i,r,r,!1),this.autoClamp&&(this.element.style.height=n),this.option.onClampEnd.call(this,{didClamp:!0})}else this.autoClamp&&(this.element.style.height=n),p(!0)}else p();function p(t){t||l.option.onClampStart.call(l,{needClamp:!1}),l.option.onClampEnd.call(l,{didClamp:!1})}},trunkSlice:function(t,e,i,n,l){var o,s=this,r=this.option.reverse?t.slice(t.length-n):t.slice(0,n);if(p(this.option.splitByWords?r.join(""):r),c(this.element)>e)o=l?i:a(i/2)||1,this.trunkSlice(t,e,o,n-o,!0);else{if(1===i&&l)return void(this.option.splitByWords&&/s/.test(r[this.option.reverse?0:r.length-1])?p((this.option.reverse?r.slice(1):r.slice(0,r.length-1)).join(""),!0):p(this.option.splitByWords?r.join(""):r,!0));o=l?a(i/2)||1:i,this.trunkSlice(t,e,o,n+o,!1)}function p(t,e){"object"==typeof s.ellipsis?(m(s.element,t),s.option.reverse?s.element.insertBefore(e?s.ellipsis:s.ellipsis.cloneNode(!0),s.element.firstChild):s.element.appendChild(e?s.ellipsis:s.ellipsis.cloneNode(!0))):s.option.reverse?m(s.element,s.ellipsis+t):m(s.element,t+s.ellipsis)}}},t});
document.querySelectorAll("#info .descr").forEach(el => {
let instance = new MultiClamp(el, {
ellipsis: '...',
clamp: 3
});
let a = el.closest('a');
a.addEventListener('click', e => {
e.preventDefault();
instance.reload({clamp: 40000});
a.querySelector('.btn').style.display = 'none';
}, { once: true })
})

* {
margin: 0;
padding: 0;
}
.container {
max-width: 480px;
margin: 10px auto;
padding: 0;
width: 100%;
}
.container:after,
.container:before {
display: table;
content: " ";
}
.row {
margin-bottom: 10px;
}
.row:after {
content: '';
display: block;
height: 0;
clear: both;
}
.col {
display: inline;
float: left;
margin: 0 5px;
width: 100%;
max-width: 150px;
text-align: left;
}
a {
color: #000000;
text-decoration: none;
}
.wrap {
position: relative;
min-height: 100%;
padding: 10px 10px 10px;
-webkit-box-sizing: border-box;
box-sizing: border-box;
background-color: yellow;
}
h3 {
margin-bottom: 10px;
}
.btn {
margin-top: 10px;
background-color: #000000;
color: #ffffff;
display: inline-block;
padding: 5px 10px;
}

<div id="info" class="container">
<div class="row">
<div class="col">
<a href="#">
<div class="wrap">
<h3>Heading 1</h3>
<div class="descr">
Lorem ipsum dolor sit amet<br /> Morbi hendrerit justo non<br /> Mauris et ligula efficitur<br /> Suspendisse eget nulla lobortis<br /> Proin vel quam ornare, commodo sem<br /> Suspendisse luctus nisi nec<br /> Nullam volutpat mi ut metus
rutrum<br /> Fusce vehicula ipsum in mauris<br /> Suspendisse consequat leo
</div>
<div class="btn">
Read More
</div>
</div>
</a>
</div>
<div class="col">
<a href="#">
<div class="wrap">
<h3>Heading 2</h3>
<div class="descr">
Lorem ipsum dolor sit amet<br /> Morbi hendrerit justo non<br /> Mauris et ligula efficitur<br /> Suspendisse eget nulla lobortis
</div>
<div class="btn">
Read More
</div>
</div>
</a>
</div>
<div class="col">
<a href="#">
<div class="wrap">
<h3>Heading 3</h3>
<div class="descr">
Lorem ipsum dolor sit amet<br /> Morbi hendrerit justo non<br /> Mauris et ligula efficitur<br /> Suspendisse eget nulla lobortis<br /> Proin vel quam ornare, commodo sem<br /> Suspendisse luctus nisi nec<br /> Nullam volutpat mi ut metus
rutrum<br /> Fusce vehicula ipsum in mauris
</div>
<div class="btn">
Read More
</div>
</div>
</a>
</div>
</div>
<div class="row">
<div class="col">
<a href="#">
<div class="wrap">
<h3>Heading 4</h3>
<div class="descr">
Lorem ipsum dolor sit amet<br /> Morbi hendrerit justo non<br /> Mauris et ligula efficitur<br /> Suspendisse eget nulla lobortis<br /> Proin vel quam ornare, commodo sem
</div>
<div class="btn">
Read More
</div>
</div>
</a>
</div>
<div class="col">
<a href="#">
<div class="wrap">
<h3>Heading 5</h3>
<div class="descr">
Lorem ipsum dolor sit amet<br /> Morbi hendrerit justo non<br /> Mauris et ligula efficitur<br /> Suspendisse eget nulla lobortis<br /> Proin vel quam ornare, commodo sem<br /> Suspendisse luctus nisi nec<br /> Nullam volutpat mi ut metus
rutrum<br /> Fusce vehicula ipsum in mauris
</div>
<div class="btn">
Read More
</div>
</div>
</a>
</div>
<div class="col">
<a href="#">
<div class="wrap">
<h3>Heading 6</h3>
<div class="descr">
Lorem ipsum dolor sit amet<br /> Morbi hendrerit justo non<br /> Mauris et ligula efficitur
</div>
<div class="btn">
Read More
</div>
</div>
</a>
</div>
</div>
</div>