如何在文本中间显示文本溢出省略号
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【中文标题】如何在文本中间显示文本溢出省略号【英文标题】:How to show text overflow ellipsis in the middle of the text 【发布时间】:2015-09-06 07:36:23 【问题描述】:我正在使用固定宽度的剑道网格。如果文本更多,则显示省略号。但我可以根据字符串的结尾区分行。由于这种影响,我无法找到它。所以,我需要在文本中间使用省略号。
例子:
abcdefghijklm
abcdefg... -> Normal Ellipse
abcd...klm -> I Want need this type of output
【问题讨论】:
我想到的唯一想法是减去最后一个树字符,将第一个字符放在一个应用省略号的跨度中,然后立即将最后三个字符。你怎么看? 你会接受文本开头的省略号吗?在纯 CSS 中无法做到这一点 确实,我没有办法处理纯 css!我的解决方案暗示了 javascript 和 css。 你是从哪种 html 开始的,包含这些字符串? 你可以在这里找到你想要的东西:***.com/questions/831552/… 【参考方案1】:一种方法如下,尽管这确实——当然——依赖于 JavaScript:
function centralEllipsis(opts)
// the default settings, which can be overridden
// by the user:
var settings =
// the number of the original characters to show:
'maxLength': 7,
// the character-sequence, or HTML character-
// entity to use to replace the missing characters:
'ellipsis': '…',
// the attribute to which you'd like to write the
// original text (this function does also write
// the text to the 'title' attribute though):
'writeToAttribute': 'data-originaltext'
,
// the element upon which we're working (cached
// because we'll access it more than once):
_this = this;
// iterating over the properties supplied by the user:
for (var prop in opts)
// if the current property ('prop') of the object
// ('opts') is enumerable and not from the prototype:
if (opts.hasOwnProperty(prop))
// we update that property in the settings object
// (if the typeof the property-value ('opts[prop]')
// is not equal to the string 'undefined', if it is
// then we use the original property-value:
settings[prop] = 'undefined' !== typeof opts[prop] ? opts[prop] : settings[prop];
// we divide the settings.maxLength by 2 to work out
// how many characters should appear at the beginning
// of the string; using Math.ceil() to ensure whole
// numbers:
var prefixLength = Math.ceil(settings.maxLength / 2),
// finding the length of the suffix by subtraction
// of the prefixLength from the settings.maxLength:
suffixLength = settings.maxLength - prefixLength,
// setting the textContent of the current element
// as the element's title text and storing it in
// a variable:
originalText = _this.title = _this.textContent,
// empty variables initialised for later:
prefix, suffix;
// if the maxLength is less than the length of the original
// text, then we go ahead (if not, we do nothing):
if (settings.maxLength < originalText.length)
// storing the original text in the specified attribute:
_this.setAttribute(settings.writeToAttribute, originalText);
// the prefix is the substring of the originalText, for
// settings.maxLength number of characters starting at
// index 0 (the beginning of the string):
prefix = originalText.substr(0, prefixLength);
// if settings.maxLength is less than 2 then the
// suffix is an empty string (''), otherwise it's
// a substring of the originalText, using a negative
// index which takes the last 'suffixLength'
// characters from the string:
suffix = settings.maxLength < 2 ? '' : originalText.substr(-suffixLength);
// here we set the innerHTML (so that we can use HTML
// character-entities, such as '…') to the
// prefix + the settings.ellipsis character(s) + the suffix:
_this.innerHTML = prefix + settings.ellipsis + suffix;
// Using Function.prototype.call() to use Array.prototype.forEach()
// on the array-like NodeList returned by document.querySelectorAll():
Array.prototype.forEach.call(document.querySelectorAll('.midEllipsis'), function (el)
// the first argument (here: 'el') supplied to the function
// is the array-element (here a DOM node from the NodeList)
// from the array (NodeList) over which we're iterating.
// using Function.prototype.apply() in order to specify
// that 'this' in the function (centralEllipsis) will be
// the supplied DOM node ('el'); the array is used to
// pass the arguments to the function, the empty object
// is what will be the 'opts' variable in the function
// called. It doesn't have to be there, it's simply left
// in place to show how to pass arguments to the function,
// and how to supply user-defined options to override the
// the defaults:
centralEllipsis.apply(el, []);
);
function centralEllipsis(opts)
var settings =
'maxLength': 7,
'ellipsis': '…',
'writeToAttribute': 'data-originaltext'
,
_this = this;
for (var prop in opts)
if (opts.hasOwnProperty(prop))
settings[prop] = 'undefined' !== typeof opts[prop] ? opts[prop] : settings[prop];
var prefixLength = Math.ceil(settings.maxLength / 2),
suffixLength = settings.maxLength - prefixLength,
originalText = _this.title = _this.textContent,
prefix, suffix;
if (settings.maxLength < originalText.length)
_this.setAttribute(settings.writeToAttribute, originalText);
prefix = originalText.substr(0, prefixLength);
suffix = settings.maxLength < 2 ? '' : originalText.substr(-suffixLength);
_this.innerHTML = prefix + settings.ellipsis + suffix;
Array.prototype.forEach.call(document.querySelectorAll('.midEllipsis'), function(el)
centralEllipsis.apply(el, []);
);
<ul>
<li class="midEllipsis">abcdefghijklm</li>
</ul>
外部JS Fiddle demo,用于实验。
要覆盖默认设置,例如将maxLength
设置为4
:
Array.prototype.forEach.call(document.querySelectorAll('.midEllipsis'), function(el)
centralEllipsis.apply(el, [
'maxLength': 4
]);
);
function centralEllipsis(opts)
var settings =
'maxLength': 7,
'ellipsis': '…',
'writeToAttribute': 'data-originaltext'
,
_this = this;
for (var prop in opts)
if (opts.hasOwnProperty(prop))
settings[prop] = 'undefined' !== typeof opts[prop] ? opts[prop] : settings[prop];
var prefixLength = Math.ceil(settings.maxLength / 2),
suffixLength = settings.maxLength - prefixLength,
originalText = _this.title = _this.textContent,
prefix, suffix;
if (settings.maxLength < originalText.length)
_this.setAttribute(settings.writeToAttribute, originalText);
prefix = originalText.substr(0, prefixLength);
suffix = settings.maxLength < 2 ? '' : originalText.substr(-suffixLength);
_this.innerHTML = prefix + settings.ellipsis + suffix;
Array.prototype.forEach.call(document.querySelectorAll('.midEllipsis'), function(el)
centralEllipsis.apply(el, [
'maxLength': 4
]);
);
<ul>
<li class="midEllipsis">abcdefghijklm</li>
</ul>
外部JS Fiddle demo,用于实验。
或将'ellipsis'
字符设置为“»”字符(例如):
Array.prototype.forEach.call(document.querySelectorAll('.midEllipsis'), function(el)
centralEllipsis.apply(el, [
'ellipsis': '»'
]);
);
function centralEllipsis(opts)
var settings =
'maxLength': 7,
'ellipsis': '…',
'writeToAttribute': 'data-originaltext'
,
_this = this;
for (var prop in opts)
if (opts.hasOwnProperty(prop))
settings[prop] = 'undefined' !== typeof opts[prop] ? opts[prop] : settings[prop];
var prefixLength = Math.ceil(settings.maxLength / 2),
suffixLength = settings.maxLength - prefixLength,
originalText = _this.title = _this.textContent,
prefix, suffix;
if (settings.maxLength < originalText.length)
_this.setAttribute(settings.writeToAttribute, originalText);
prefix = originalText.substr(0, prefixLength);
suffix = settings.maxLength < 2 ? '' : originalText.substr(-suffixLength);
_this.innerHTML = prefix + settings.ellipsis + suffix;
Array.prototype.forEach.call(document.querySelectorAll('.midEllipsis'), function(el)
centralEllipsis.apply(el, [
'ellipsis': '»'
]);
);
<ul>
<li class="midEllipsis">abcdefghijklm</li>
</ul>
外部JS Fiddle demo,用于实验。
参考资料:
Array.prototype.forEach()
。
Conditional (Ternary) operator。
document.querySelectorAll()
。
Element.innerHTML
。
Element.setAttribute()
。
Function.prototype.apply()
。
Function.prototype.call()
。
Node.textContent
。
String.prototype.substr()
。
typeof
operator。
【讨论】:
超级...非常感谢。【参考方案2】:您添加了 css 和 javascript 标签,因此我想到了一种解决方法,这意味着这两种语言。
您可以尝试下一个解决方法: 1. 减去 variable_a 中除最后三个以外的所有字符。在 variable_b 中减去最后三个字符。 2. 在应用了省略号的跨度中抛出 variable_a。 3. 在第一个跨度之后立即添加另一个没有省略号的跨度,并用最后三个字符(变量_b)填充它
【讨论】:
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