电脑/html5/javascript语言/javascript语言学习进阶.html

<!DOCTYPE html>
<html>
<head>
<!-- 2016-07-30 六 23:07 -->
<meta  charset="utf-8">
<meta  name="viewport" content="width=device-width, initial-scale=1">
<title>javascript语言学习进阶</title>
<meta  name="generator" content="Org-mode">
<meta  name="author" content="万泽(德山书生)">
<meta  name="description" content="制作者邮箱：a358003542@gmail.com"
>
<style type="text/css">
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.title {
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blockquote {
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/* dl */
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dt {
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dd {
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@media (min-width: 768px) {
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video{
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figure p{
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embed{
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table
*/
table {
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table tr {
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table th,table td{
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table tr:nth-child(even) {
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ul,ol,dl{
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li{
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#content .section ul,#content .toctree-wrapper ul,article ul{
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@media screen and (max-width: 480px){
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.figure p{
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sup{
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sub{
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legend{
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#content .danger,#content .error{
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a{
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a:hover,a:active{
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a:hover{
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a:visited{
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.right{
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#table-of-contents li.divide-bottom{
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#table-of-contents li.current a:hover{
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#table-of-contents li a{
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#table-of-contents li.on a:hover,#table-of-contents li.current>a:hover{
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#table-of-contents li ul li a{
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#table-of-contents li ul li ul li a{
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/* #table-of-contents li ul{ */
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ul.nav li.active ul li ul li {
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ul.nav li.active ul li.active ul li a {
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ul.nav li.active ul li ul li a {
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ul.nav li ul li ul li ul li {
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ul.nav li.active > a {
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ul.nav li.active a {
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#postamble .creator,#postamble .validation {
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#copyright a{
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#copyright .rst-current-version{
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#content div.figure.align-center{
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#content .section>img,#content .section>a>img{
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.verse{
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#content .note .last,#content .attention .last,#content .caution .last,#content .danger .last,#content .error .last,#content .hint .last,#content .important .last,#content .tip .last,#content .warning .last,#content .seealso .last,#content .admonitiontodo .last{
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#content .section ol p,#content .section ul p{
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#content .sidebar p,#content .sidebar ul,#content .sidebar dl{
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#content .sidebar .last{
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#content .sidebar .sidebar-title{
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h2.footnotes{
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.highlight .nb { color: #204a87 } /* Name.Builtin */
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<body>
<div id="content">
<header>
<h1 class="title">javascript语言学习进阶</h1>
</header><nav id="table-of-contents">
<h2>Table of Contents</h2>
<div id="text-table-of-contents">
<ul>
<li><a href="#orgheadline3">1. JSON对象</a>
<ul>
<li><a href="#orgheadline1">1.1. stringify函数</a></li>
<li><a href="#orgheadline2">1.2. parse函数</a></li>
</ul>
</li>
<li><a href="#orgheadline4">2. 用javascript改变网页全局的css设置</a></li>
<li><a href="#orgheadline5">3. 参考资料</a></li>
</ul>
</div>
</nav>


<div class="outline-2">
<h2 id="orgheadline3">JSON对象</h2>
<div class="outline-text-2" id="text-1">
<p>
json之前了解过一些了:
</p>
<pre>
number：和JavaScript的number完全一致；
boolean：就是JavaScript的true或false；
string：就是JavaScript的string；
null：就是JavaScript的null；
array：就是JavaScript的Array表示方式——[]；
object：就是JavaScript的{ ... }表示方式。
</pre>
</div>

<div class="outline-3">
<h3 id="orgheadline1">stringify函数</h3>
<div class="outline-text-3" id="text-1-1">
<p>
某个javascript对象字符串化。
</p>
<pre>
JSON.stringify(xiaoming, null, '  ');
</pre>
</div>
</div>


<div class="outline-3">
<h3 id="orgheadline2">parse函数</h3>
<div class="outline-text-3" id="text-1-2">
<p>
将某个javascript对象刷成json对象。
</p>
<pre>
JSON.parse('[1,2,3,true]');
</pre>
</div>
</div>
</div>


<div class="outline-2">
<h2 id="orgheadline4">用javascript改变网页全局的css设置</h2>
<div class="outline-text-2" id="text-2">
<p>
参考了 <a href="http://stackoverflow.com/questions/566203/changing-css-values-with-javascript">这个网页</a> 。
</p>

<div class="highlight"><pre><span></span><span class="kd">function</span> <span class="nx">change_general_css</span><span class="p">(</span><span class="nx">selector</span><span class="p">,</span> <span class="nx">property</span><span class="p">,</span> <span class="nx">value</span><span class="p">)</span> <span class="p">{</span>
    <span class="k">for</span> <span class="p">(</span><span class="kd">var</span> <span class="nx">i</span><span class="o">=</span><span class="mi">0</span><span class="p">;</span> <span class="nx">i</span><span class="o">&lt;</span><span class="nb">document</span><span class="p">.</span><span class="nx">styleSheets</span><span class="p">.</span><span class="nx">length</span><span class="p">;</span><span class="nx">i</span><span class="o">++</span><span class="p">)</span> <span class="p">{</span><span class="c1">//Loop through all styles</span>
        <span class="c1">//Try add rule</span>
        <span class="k">try</span> <span class="p">{</span> <span class="nb">document</span><span class="p">.</span><span class="nx">styleSheets</span><span class="p">[</span><span class="nx">i</span><span class="p">].</span><span class="nx">insertRule</span><span class="p">(</span><span class="nx">selector</span><span class="o">+</span> <span class="s1">&#39; {&#39;</span><span class="o">+</span><span class="nx">property</span><span class="o">+</span><span class="s1">&#39;:&#39;</span><span class="o">+</span><span class="nx">value</span><span class="o">+</span><span class="s1">&#39;}&#39;</span><span class="p">,</span> <span class="nb">document</span><span class="p">.</span><span class="nx">styleSheets</span><span class="p">[</span><span class="nx">i</span><span class="p">].</span><span class="nx">cssRules</span><span class="p">.</span><span class="nx">length</span><span class="p">);</span>
        <span class="p">}</span> <span class="k">catch</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span> <span class="p">{</span><span class="k">try</span> <span class="p">{</span> <span class="nb">document</span><span class="p">.</span><span class="nx">styleSheets</span><span class="p">[</span><span class="nx">i</span><span class="p">].</span><span class="nx">addRule</span><span class="p">(</span><span class="nx">selector</span><span class="p">,</span> <span class="nx">property</span><span class="o">+</span><span class="s1">&#39;:&#39;</span><span class="o">+</span><span class="nx">value</span><span class="p">);}</span> <span class="k">catch</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span> <span class="p">{}}</span><span class="c1">//IE</span>
    <span class="p">}</span>
<span class="p">}</span>
</pre></div>
</div>
</div>


<div class="outline-2">
<h2 id="orgheadline5">参考资料</h2>
<div class="outline-text-2" id="text-3">
<ol class="org-ol">
<li><a href="http://bonsaiden.github.io/JavaScript-Garden/zh/">javascript秘密花园</a></li>
</ol>
</div>
</div>
</div>
</body>
</html>