JS 按元素宽度自动截取长度的文本截取控件 - 踏得网

Shave, a javascript plugin for shaving text

JavaScript

《aframe.js 3d拼图代码详解》作品已被踏得网收录！

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编译

JavaScript

(function(global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
        typeof define === 'function' && define.amd ? define(factory) :
        (global.shave = factory());
}(this, (function() {
    'use strict';

function shave(target, maxheight, opts) {
        var els = typeof target === 'string' ? document.querySelectorAll(target) : target;
        if (!('length' in els)) {
            els = [els];
        }
        if (!maxheight) {
            throw Error('maxHeight is required');
        }
        var hasOpts = typeof opts !== 'undefined';
        var defaults = {
            character: hasOpts ? opts.character : '…',
            classname: hasOpts ? opts.classname : 'js-shave'
        };
        var shaveCharWrap = '<span class="js-shave-char">' + defaults.character + '</span>';
        for (var i = 0; i < els.length; i++) {
            var el = els[i];
            var span = el.querySelector(defaults.classname);
            if (el.offsetHeight < maxheight && span) {
                el.removeChild(el.querySelector('.js-shave-char'));
                var _text = el.textContent;
                el.removeChild(span);
                el.textContent = _text;
                return;
            } else if (el.offsetHeight < maxheight) return;
            var text = el.textContent;
            var trimmedText = text;
            do {
                var lastSpace = trimmedText.lastIndexOf(' ');
                if (lastSpace < 0) break;
                trimmedText = trimmedText.substr(0, lastSpace);
                el.textContent = trimmedText;
            } while (el.offsetHeight > maxheight);
            var k = 0;
            var diff = '';
            for (var j = 0; j < text.length; j++) {
                if (trimmedText[k] !== text[j] || i === trimmedText.length) {
                    diff += text[j];
                } else {
                    k++;
                }
            }
            el.insertAdjacentHTML('beforeend', shaveCharWrap + '<span class="' + defaults.classname + '" style="display:none;">' + diff + '</span>');
            return;
        }
    }
    var plugin = window.$ || window.jQuery || window.Zepto;
    if (plugin) {
        plugin.fn.extend({
            shave: function shaveFunc(maxheight, opts) {
                return shave(this, maxheight, opts);
            }
        });
    }

return shave;

})));

shave('p', 70);

编译

CSS

HTML

<script src="https://wow.techbrood.com/libs/jquery/jquery-1.11.1.min.js"></script>
<p>
    Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam sollicitudin consequat eros, non posuere justo hendrerit quis. Integer eget risus dapibus, rutrum nisl sit amet, posuere dui. Cras vitae urna ac urna placerat vulputate. Morbi et tortor vel
    nisi rutrum consequat. Pellentesque non sem cursus, rhoncus nisi sed, semper quam. Phasellus efficitur iaculis auctor. Pellentesque at aliquam leo. Proin diam nulla, mollis vitae nibh sit amet, interdum suscipit risus. Sed fermentum leo enim, a pretium
    ipsum sollicitudin non. Nunc tempus nunc sed laoreet porttitor. Duis varius purus pellentesque luctus vestibulum. In ex dui, maximus vitae nisl a, molestie malesuada purus. Duis semper est in varius mattis. Pellentesque mollis convallis ex eu pretium.
    Vivamus eleifend nunc a sem euismod, non consequat purus varius. Donec hendrerit eleifend ex ac cursus. Ut ac nibh quis massa rhoncus accumsan. Praesent ultricies arcu quis magna tempus, vitae tristique diam euismod. Proin accumsan quam magna, quis
    condimentum diam lacinia et. Quisque tempor tellus neque, vitae facilisis dui mollis sit amet. Sed sit amet augue ac mi cursus egestas nec gravida velit. Suspendisse eu nunc tristique lorem eleifend vulputate. Aliquam viverra ex sed augue mollis,
    eu feugiat purus volutpat. Donec consectetur a lectus ac accumsan. Aenean massa libero, pellentesque a ultrices nec, commodo eget neque. Duis blandit augue et tempus egestas. Aenean facilisis lectus eget venenatis blandit. Nam porta sollicitudin erat,
    at fermentum eros iaculis ut.
</p>