处理此站点的用户脚本,因此我可以添加元素的唯一方法是使用JavaScript。目前它很简单,但很多,我希望能够减少代码。
我有这个:
var elm = document.getElementById('main'),
nav = document.createElement('nav'),
ul = document.createElement('ul'),
l1 = document.createElement('li'),
l2 = document.createElement('li'),
l3 = document.createElement('li'),
l4 = document.createElement('li'),
l5 = document.createElement('li'),
l6 = document.createElement('li'),
l7 = document.createElement('li'),
nest2 = document.createElement('ul'),
nest3 = document.createElement('ul'),
nest4 = document.createElement('ul'),
nest2L1 = document.createElement('li'),
nest2L2 = document.createElement('li'),
nest2L3 = document.createElement('li'),
nest3L1 = document.createElement('li'),
nest3L2 = document.createElement('li'),
nest3L3 = document.createElement('li'),
nest3L4 = document.createElement('li'),
nest4L1 = document.createElement('li'),
nest4L2 = document.createElement('li');
nav.id = 'ps-nav';
ul.id = 'ps-ul';
l1.id = 'ps-announcements';
l1.className = 'ps-listItem';
l2.id = 'ps-sponge';
l2.className = 'ps-listItem';
nest2.id = 'ps-sponge-nest';
nest2.className = 'ps-nest';
l3.id = 'ps-plugins';
l3.className = 'ps-listItem';
nest3.id = 'ps-plugins-nest';
nest3.className = 'ps-nest';
l4.id = 'ps-generalDiscussion';
l4.className = 'ps-listItem';
nest4.id = 'ps-generalDiscussion';
nest4.clasName = 'ps-nest';
l5.id = 'ps-serverDiscussion';
l5.className = 'ps-listItem';
l6.id = 'ps-meta';
l6.className = 'ps-listItem';
l7.id = 'ps-uncategorized';
l7.className = 'ps-listItem';
elm.appendChild(nav);
nav.appendChild(ul);
ul.appendChild(l1);
ul.appendChild(l2);
l2.appendChild(nest2);
nest1.appendChild(nest2L1);
nest1.appendChild(nest2L2);
nest1.appendChild(nest2L3);
ul.appendChild(l3);
l3.appendChild(nest3);
nest2.appendChild(nest3L1);
nest2.appendChild(nest3L2);
nest2.appendChild(nest3L3);
nest2.appendChild(nest3L4);
ul.appendChild(l4);
l4.appendChild(nest4);
nest3.appendChild(nest4L1);
nest3.appendChild(nest4L2);
ul.appendChild(l5);
ul.appendChild(l6);
ul.appendChild(l7);
我已经将缩进嵌套以获得更高的可读性 如何减少这里实现相同影响的代码量?
答案 0 :(得分:0)
简单的javascript:
outerHTML
。这可以使用多行字符串完成。像这样:
var elm = document.getElementById ('main');
var nav = document.createElement ('nav');
elm.appendChild (nav);
nav.outerHTML = multilineStr ( function () {/*!
<nav id="ps-nav">
<ul id="ps-ul">
<li id="ps-announcements" class="ps-listItem">Hiya!</li>
// ETC., ETC.
</ul>
</nav>
*/} );
//-- Reaquire `nav` variable, if desired.
nav = document.getElementById ('ps-nav');
function multilineStr (dummyFunc) {
var str = dummyFunc.toString ();
str = str.replace (/^[^\/]+\/\*!?/, '') // Strip function() { /*!
.replace (/\s*\*\/\s*\}\s*$/, '') // Strip */ }
.replace (/\/\/.+$/gm, '') // Double-slash comments wreck CSS. Strip them.
;
return str;
}
另请参阅"Why does changing the innerHTML, of my box, make my button stop working in Greasemonkey?"和类似问题。
jQuery等价物是:
$("#main").append (multilineStr ( function () {/*!
<nav id="ps-nav">
<ul id="ps-ul">
<li id="ps-announcements" class="ps-listItem">Hiya!</li>
// ETC., ETC.
</ul>
</nav>
*/} ) );
//-- Reaquire `nav`, if desired.
var nav = $('#ps-nav');
function multilineStr (dummyFunc) {
var str = dummyFunc.toString ();
str = str.replace (/^[^\/]+\/\*!?/, '') // Strip function() { /*!
.replace (/\s*\*\/\s*\}\s*$/, '') // Strip */ }
.replace (/\/\/.+$/gm, '') // Double-slash comments wreck CSS. Strip them.
;
return str;
}