JS-isArray.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>JS isArray</title>
    <style>
      * {
        font-family: Arial, Helvetica, sans-serif;
      }

      table {
        font-family: arial, sans-serif;
        border-collapse: collapse;
        width: 50%;
      }

      td,
      th {
        border: 1px solid #dddddd;
        text-align: left;
        padding: 8px;
      }

      tr:nth-child(even) {
        background-color: #dddddd;
      }

      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;
      }

      :not(pre) > code[class*="language-"]::after,
      pre[class*="language-"]::after {
        right: 0.75em;

        left: auto;

        -webkit-transform: rotate(2deg);

        -moz-transform: rotate(2deg);

        -ms-transform: rotate(2deg);

        -o-transform: rotate(2deg);

        transform: rotate(2deg);
      }
      pre[class*="language-"]::before,
      pre[class*="language-"]::after {
        content: "";

        z-index: -2;

        display: block;

        position: absolute;

        bottom: 0.75em;

        left: 0.18em;

        width: 40%;

        height: 20%;

        max-height: 13em;

        -webkit-transform: rotate(-2deg);

        -moz-transform: rotate(-2deg);

        -ms-transform: rotate(-2deg);

        -o-transform: rotate(-2deg);

        transform: rotate(-2deg);
      }

      :not(pre) > code[class*="language-"],
      pre[class*="language-"] {
        background-color: #fdfdfd;

        -webkit-box-sizing: border-box;

        -moz-box-sizing: border-box;

        box-sizing: border-box;

        margin-bottom: 1em;
      }
      pre[class*="language-"] {
        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;

        overflow: auto;

        -ms-overflow-style: scrollbar;
      }
      code,
      kbd,
      pre,
      samp {
        font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
          "Courier New", monospace;

        font-size: 1em;
      }

      pre[class*="language-"] > code {
        position: relative;
        border-left: 10px solid #358ccb;
        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"] {
        max-height: inherit;
        height: inherit;
        padding: 0 1em;
        display: block;
        overflow: auto;
      }

      code[class*="language-"],
      pre[class*="language-"] {
        color: black;
        background: none;
        background-color: rgba(0, 0, 0, 0);
        background-attachment: scroll;
        background-image: none;
        background-size: auto;
        background-origin: padding-box;
        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 code {
        font-size: inherit;
        color: inherit;
        word-break: normal;
      }

      code {
        font-size: 87.5%;
        color: #e83e8c;
        word-wrap: break-word;
      }
      code,
      kbd,
      pre,
      samp {
        font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
          "Courier New", monospace;
        font-size: 1em;
      }
      *,
      ::after,
      ::before {
        box-sizing: border-box;
      }
    </style>
  </head>
  <body>
    <h1>JS isArray</h1>
    <p>
      The isArray() method returns true if an object is an array, otherwise
      false.
    </p>
    <h3>Array.isArray()</h3>
    <p>Array.isArray() is a static property of the JavaScript Array object.</p>
    <p>You can only use it as Array.isArray().</p>
    <p>Using x.isArray(), where x is an array will return undefined.</p>
    <h3>Syntax</h3>
    <pre
      class="language-javascript"
      tabindex="0"
    ><code class="language-javascript">Array<span class="token punctuation">.</span><span class="token function">isArray</span><span class="token punctuation">(</span>obj<span class="token punctuation">)</span>
</code></pre>
    <h3>Parameters</h3>
    <table class="table table-bordered table-striped">
      <tbody>
        <tr></tr>
        <tr>
          <td>Parameter</td>
          <td>Description</td>
        </tr>
        <tr>
          <td><em>obj</em></td>
          <td>
            Required.<br />
            An object (or any data type) to be tested.
          </td>
        </tr>
      </tbody>
    </table>
    <h3>Return Value</h3>
    <table class="table table-bordered table-striped">
      <tbody>
        <tr></tr>
        <tr>
          <td>Type</td>
          <td>Description</td>
        </tr>
        <tr>
          <td>A boolean</td>
          <td>
            <code>true</code>&nbsp;if the object is an array,
            otherwise&nbsp;<code>false</code>.
          </td>
        </tr>
      </tbody>
    </table>
    <pre
      class="language-markup"
      tabindex="0"
    ><code class="language-markup"><span class="token doctype"><span class="token punctuation">&lt;!</span><span class="token doctype-tag">DOCTYPE</span> <span class="token name">html</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>html</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>head</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>title</span><span class="token punctuation">&gt;</span></span>JavaScript<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>title</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
    <span class="token keyword">var</span> a <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token string">"Sanjay"</span><span class="token punctuation">,</span> <span class="token string">"Aman"</span><span class="token punctuation">,</span> <span class="token string">"Rehman"</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
    document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span>a <span class="token operator">+</span> <span class="token string">"&lt;br&gt;&lt;br&gt;"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">var</span> b <span class="token operator">=</span> Array<span class="token punctuation">.</span><span class="token function">isArray</span><span class="token punctuation">(</span>a<span class="token punctuation">)</span><span class="token punctuation">;</span>
    document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span>b<span class="token punctuation">)</span><span class="token punctuation">;</span>
  </span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>head</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>body</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>body</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>html</span><span class="token punctuation">&gt;</span></span>
</code></pre>
    <hr />
    <h3>isArray() with if condition</h3>
    <pre
      class="language-markup"
      tabindex="0"
    ><code class="language-markup"><span class="token doctype"><span class="token punctuation">&lt;!</span><span class="token doctype-tag">DOCTYPE</span> <span class="token name">html</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>html</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>head</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>title</span><span class="token punctuation">&gt;</span></span>JavaScript<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>title</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
    <span class="token keyword">var</span> a <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token string">"Sanjay"</span><span class="token punctuation">,</span> <span class="token string">"Aman"</span><span class="token punctuation">,</span> <span class="token string">"Rehman"</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
    <span class="token keyword">if</span><span class="token punctuation">(</span>Array<span class="token punctuation">.</span><span class="token function">isArray</span><span class="token punctuation">(</span>a<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
        document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span><span class="token string">"This is an Array"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> 
    <span class="token punctuation">}</span><span class="token keyword">else</span><span class="token punctuation">{</span>
        document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span><span class="token string">"This is not an Array"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>  
    <span class="token punctuation">}</span>
  </span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>head</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>body</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>body</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>html</span><span class="token punctuation">&gt;</span></span>
</code></pre>
    <hr />
  </body>
  <script>
    let ary = [
      "Hamza Khan Lodhi",
      "Umar Hayat Khan Lodi",
      "Zaid Khan Lodhi",
      50,
      80,
      90,
      90,
      970,
      7,
      97,
      90,
      10,
      1,
    ];
    if (Array.isArray(ary)) {
      document.write("This is an Array");
    } else {
      document.write("THis is not an Array");
    }
  </script>
</html>