ethers.js/docs/v4/getting-started.html

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<li class="toctree-l1 current"><a class="current reference internal" href="#">Getting Started</a><ul>
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<div class="section" id="getting-started">
<h1>Getting Started<a class="headerlink" href="#getting-started" title="Permalink to this headline"></a></h1>
<p>The ethers.js library is a compact and complete JavaScript library for Ethereum.</p>
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<h2>Installing in Node.js<a class="headerlink" href="#installing-in-node-js" title="Permalink to this headline"></a></h2>
<p>Install the ethers.js library from your project directory:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">/</span><span class="n">home</span><span class="o">/</span><span class="n">ricmoo</span><span class="o">/</span><span class="n">my</span><span class="o">-</span><span class="n">project</span><span class="o">&gt;</span> <span class="n">npm</span> <span class="n">install</span> <span class="o">--</span><span class="n">save</span> <span class="n">ethers</span>
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<h3>Importing<a class="headerlink" href="#importing" title="Permalink to this headline"></a></h3>
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<div class="code-block-caption"><span class="caption-text"><em>JavaScript (ES3)</em></span><a class="headerlink" href="#id1" title="Permalink to this code"></a></div>
<div class="highlight-javascript notranslate"><div class="highlight"><pre><span></span><span class="kd">var</span> <span class="nx">ethers</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">&#39;ethers&#39;</span><span class="p">);</span>
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<div class="code-block-caption"><span class="caption-text"><em>JavaScript (ES5 or ES6)</em></span><a class="headerlink" href="#id2" title="Permalink to this code"></a></div>
<div class="highlight-javascript notranslate"><div class="highlight"><pre><span></span><span class="kr">const</span> <span class="nx">ethers</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">&#39;ethers&#39;</span><span class="p">);</span>
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<div class="code-block-caption"><span class="caption-text"><em>JavaScript (ES6) / TypeScript</em></span><a class="headerlink" href="#id3" title="Permalink to this code"></a></div>
<div class="highlight-javascript notranslate"><div class="highlight"><pre><span></span><span class="kr">import</span> <span class="p">{</span> <span class="nx">ethers</span> <span class="p">}</span> <span class="nx">from</span> <span class="s1">&#39;ethers&#39;</span><span class="p">;</span>
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<h2>Including in Web Applications<a class="headerlink" href="#including-in-web-applications" title="Permalink to this headline"></a></h2>
<p>For security purposes, it is usually best to place a <strong>copy</strong> of <a class="reference external" href="https://cdn.ethers.io/scripts/ethers-v4.min.js">this script</a> on
the applications server, but for a quick prototype using the Ethers CDN (content
distribution network) should suffice.</p>
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<div class="code-block-caption"><span class="caption-text"><em>HTML</em></span><a class="headerlink" href="#id4" title="Permalink to this code"></a></div>
<div class="highlight-html notranslate"><div class="highlight"><pre><span></span><span class="c">&lt;!-- This exposes the library as a global variable: ethers --&gt;</span>
<span class="p">&lt;</span><span class="nt">script</span> <span class="na">src</span><span class="o">=</span><span class="s">&quot;https://cdn.ethers.io/scripts/ethers-v4.min.js&quot;</span>
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<span class="na">type</span><span class="o">=</span><span class="s">&quot;text/javascript&quot;</span><span class="p">&gt;</span>
<span class="p">&lt;/</span><span class="nt">script</span><span class="p">&gt;</span>
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