<h2 id="1-es6-includes-">1. ES6 <code>.includes()</code>:</h2>
<pre><code class="lang-js"><span class="hljs-keyword">var</span> S = <span class="hljs-string">"fullweb"</span>;
S.includes(<span class="hljs-string">"web"</span>);
</code></pre>
<h2 id="2-regexp-search-">2. RegExp <code>.search()</code>:</h2>
<pre><code class="lang-js"><span class="hljs-keyword">var</span> S = <span class="hljs-string">"fullweb"</span>;
S.search(<span class="hljs-regexp">/web/</span>);
</code></pre>
<h2 id="3-regexp-match-">3. RegExp <code>.match()</code>:</h2>
<pre><code class="lang-js"><span class="hljs-keyword">var</span> S = <span class="hljs-string">"fullweb"</span>;
S.match(<span class="hljs-regexp">/web/</span>);
</code></pre>
<h2 id="4-regexp-test-">4. RegExp <code>.test()</code>:</h2>
<pre><code class="lang-js"><span class="hljs-keyword">var</span> S = <span class="hljs-string">"fullweb"</span>;
<span class="hljs-regexp">/web/</span>.test(S)
</code></pre>
<h2 id="5-good-old-indexof-">5. Good old <code>.indexOf()</code>:</h2>
<pre><code class="lang-js"><span class="hljs-keyword">var</span> S = <span class="hljs-string">"fullweb"</span>;
S.indexOf(<span class="hljs-string">"web"</span>);
</code></pre>


## 1. ES6 `.includes()`:

```js
var S = "fullweb";
S.includes("web");
```

## 2. RegExp `.search()`:

```js
var S = "fullweb";
S.search(/web/);
```

## 3. RegExp `.match()`:

```js
var S = "fullweb";
S.match(/web/);
```

## 4. RegExp `.test()`:

```js
var S = "fullweb";
/web/.test(S)
```

## 5. Good old `.indexOf()`:

```js
var S = "fullweb";
S.indexOf("web");
```

Check if a string contains a substring in JavaScript

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Check if a string contains a substring in JavaScript

1. ES6 `.includes()`:

2. RegExp `.search()`:

3. RegExp `.match()`:

4. RegExp `.test()`:

5. Good old `.indexOf()`:

Check if a string contains a substring in JavaScript

1. ES6 .includes():

2. RegExp .search():

3. RegExp .match():

4. RegExp .test():

5. Good old .indexOf():

1. ES6 `.includes()`:

2. RegExp `.search()`:

3. RegExp `.match()`:

4. RegExp `.test()`:

5. Good old `.indexOf()`: