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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>JS Children Methods</title>
<style>
* {
font-family: Arial, Helvetica, sans-serif;
}
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font-family: arial, sans-serif;
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width: 50%;
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td,
th {
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text-align: left;
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tr:nth-child(even) {
background-color: #dddddd;
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.xyz {
background-color: green;
color: red;
}
code[class*="language-"],
pre[class*="language-"] {
color: black;
background: none;
background-color: rgba(0, 0, 0, 0);
font-family: Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
font-size: 1em;
text-align: left;
white-space: pre;
word-spacing: normal;
word-break: normal;
word-wrap: normal;
line-height: 1.5;
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-webkit-hyphens: none;
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hyphens: none;
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:not(pre) > code[class*="language-"]::after,
pre[class*="language-"]::after {
right: 0.75em;
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pre[class*="language-"]::before,
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content: "";
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position: absolute;
bottom: 0.75em;
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-moz-transform: rotate(-2deg);
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pre[class*="language-"] {
background-color: #fdfdfd;
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box-sizing: border-box;
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position: relative;
margin: 0.5em 0;
margin-bottom: 0.5em;
overflow: visible;
padding: 0;
}
code[class*="language-"],
pre[class*="language-"] {
color: black;
background: none;
background-color: rgba(0, 0, 0, 0);
font-family: Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
font-size: 1em;
text-align: left;
white-space: pre;
word-spacing: normal;
word-break: normal;
word-wrap: normal;
line-height: 1.5;
-moz-tab-size: 4;
-o-tab-size: 4;
tab-size: 4;
-webkit-hyphens: none;
-moz-hyphens: none;
-ms-hyphens: none;
hyphens: none;
}
pre {
display: block;
font-size: 87.5%;
color: #212529;
}
pre {
margin-top: 0;
margin-bottom: 1rem;
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code,
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samp {
font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
"Courier New", monospace;
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box-shadow: -1px 0px 0px 0px #358ccb, 0px 0px 0px 1px #dfdfdf;
background-color: #fdfdfd;
background-image: linear-gradient(
transparent 50%,
rgba(69, 142, 209, 0.04) 50%
);
background-size: 3em 3em;
background-origin: content-box;
background-attachment: local;
}
code[class*="language"] {
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height: inherit;
padding: 0 1em;
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code[class*="language-"],
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background: none;
background-color: rgba(0, 0, 0, 0);
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*,
::after,
::before {
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}
@import "color.css";
* {
box-sizing: border-box;
}
body {
font: 18px/24px arial;
}
#wrapper {
border: 1px solid black;
width: 1000px;
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margin: 0 auto;
}
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#top-bar ul {
margin: 0;
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#wrapper {
width: 500px;
}
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}
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}
}
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#wrapper {
width: auto;
}
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width: 100%;
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#header h1 {
padding: 30px 0 0 0;
text-align: center;
}
}
</style>
</head>
<body>
<hr />
<h3>JS Children Methods</h3>
<p>
The <code>children</code> property returns a collection of an
element's child elements.
</p>
<p>
The <code>children</code> property returns
an HTMLCollection object.<br />
</p>
<h3>childNodes:</h3>
<p>
The <code>childNodes</code> property returns a collection (list)
of an elements's child nodes.
</p>
<p>
The <code>childNodes</code> property returns
a NodeList object.
</p>
<p>The <code>childNodes</code> property is read-only.</p>
<p>
<code>childNodes[0]</code> is the same
as <code>firstChild</code>.
</p>
<h3>html file</h3>
<pre
class="language-markup"
tabindex="0"
><code class="language-markup"><span class="token doctype"><span class="token punctuation"><!</span><span class="token doctype-tag">DOCTYPE</span> <span class="token name">html</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>html</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>main<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>head</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>title</span><span class="token punctuation">></span></span>Basic Layout<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>title</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>head</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>style</span><span class="token punctuation">></span></span><span class="token style"><span class="token language-css">
<span class="token selector">#outer</span> <span class="token punctuation">{</span>
<span class="token property">width</span><span class="token punctuation">:</span> 550px<span class="token punctuation">;</span>
<span class="token property">height</span><span class="token punctuation">:</span> 300px<span class="token punctuation">;</span>
<span class="token property">padding</span><span class="token punctuation">:</span> 10px 10px<span class="token punctuation">;</span>
<span class="token property">margin</span><span class="token punctuation">:</span> 0 auto<span class="token punctuation">;</span>
<span class="token property">background</span><span class="token punctuation">:</span> lightsalmon<span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token selector">#inner</span> <span class="token punctuation">{</span>
<span class="token property">width</span><span class="token punctuation">:</span> 500px<span class="token punctuation">;</span>
<span class="token property">height</span><span class="token punctuation">:</span> 200px<span class="token punctuation">;</span>
<span class="token property">padding</span><span class="token punctuation">:</span> 10px 10px<span class="token punctuation">;</span>
<span class="token property">margin</span><span class="token punctuation">:</span> 0 auto<span class="token punctuation">;</span>
<span class="token property">background</span><span class="token punctuation">:</span> mediumorchid<span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token selector">#inner div</span> <span class="token punctuation">{</span>
<span class="token property">display</span><span class="token punctuation">:</span> inline-block<span class="token punctuation">;</span>
<span class="token property">background</span><span class="token punctuation">:</span> #fff<span class="token punctuation">;</span>
<span class="token property">width</span><span class="token punctuation">:</span> 95px<span class="token punctuation">;</span>
<span class="token property">height</span><span class="token punctuation">:</span> 50px<span class="token punctuation">;</span>
<span class="token property">line-height</span><span class="token punctuation">:</span> 50px<span class="token punctuation">;</span>
<span class="token property">text-align</span><span class="token punctuation">:</span> center<span class="token punctuation">;</span>
<span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>style</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>body</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>outer<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h2</span><span class="token punctuation">></span></span>Outer<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h2</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>inner<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h2</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>child-head<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>Inner<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h2</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span><span class="token punctuation">></span></span>A<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span><span class="token punctuation">></span></span>B<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>child-C<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>C<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span><span class="token punctuation">></span></span>D<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>child-E<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>E<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>script</span> <span class="token attr-name">src</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>js/dom-nav.js<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token script"></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>script</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>body</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>html</span><span class="token punctuation">></span></span></code></pre>
<h3>
<br />
dom-nav.js
</h3>
<pre
class="language-javascript"
tabindex="0"
><code class="language-javascript"><span class="token comment">//var a = document.getElementById("outer").children;</span>
<span class="token comment">//var a = document.getElementById("inner").children;</span>
<span class="token comment">//var a = document.getElementById("inner").children[1];</span>
<span class="token comment">/* document.getElementById("inner").children[1].style.background = "red";
var a = document.getElementById("inner").children[1]; */</span>
<span class="token comment">/* document.getElementById("inner").children[0].style.background = "red";
var a = document.getElementById("inner").children[0].innerHTML; */</span>
<span class="token comment">//var a = document.getElementById("inner").childNodes;</span>
<span class="token comment">//var a = document.getElementById("inner").childNodes[0].innerHTML;</span>
document<span class="token punctuation">.</span><span class="token function">getElementById</span><span class="token punctuation">(</span><span class="token string">"inner"</span><span class="token punctuation">)</span><span class="token punctuation">.</span>childNodes<span class="token punctuation">[</span><span class="token number">3</span><span class="token punctuation">]</span><span class="token punctuation">.</span>style<span class="token punctuation">.</span>background <span class="token operator">=</span> <span class="token string">"red"</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> a <span class="token operator">=</span> document<span class="token punctuation">.</span><span class="token function">getElementById</span><span class="token punctuation">(</span><span class="token string">"inner"</span><span class="token punctuation">)</span><span class="token punctuation">.</span>childNodes<span class="token punctuation">[</span><span class="token number">3</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>a<span class="token punctuation">)</span><span class="token punctuation">;</span></code></pre>
<hr />
</body>
</html>