How to Check if a String Contains Any of the Substrings from an Array in JavaScript?

Finding Substrings in a String with JavaScript Arrays

To determine if a string contains any of the substrings from an array, JavaScript provides flexible approaches.

Array Some Method

The some method iterates over an array, providing a callback function to test each element. To check for substrings, use the indexOf() method to search for each array element within the string:

<code class="js">if (substrings.some(function(v) { return str.indexOf(v) >= 0; })) {
    // There's at least one substring match
}</code>

Regular Expression

Regular expressions offer a powerful way to match text patterns. To search for any substring in the array within the string, create a regex with all substrings as alternate options and use the test() method:

<code class="js">const regex = new RegExp(substrings.join("|"));
if (regex.test(str)) {
    // At least one substring matches
}</code>

Example

Let's consider an array of substrings:

<code class="js">const substrings = ["one", "two", "three"];</code>

String with Substring Match

<code class="js">const str = "This string includes \"one\".";

// Using array some method
const someMethodMatch = substrings.some(v => str.includes(v));

// Using regular expression
const regexMatch = str.match(new RegExp(substrings.join("|")));</code>

String without Substring Match

<code class="js">const str = "This string doesn't have any substrings.";

// Using array some method
const someMethodNoMatch = substrings.some(v => str.includes(v));

// Using regular expression
const regexNoMatch = str.match(new RegExp(substrings.join("|")));</code>

Results

Test Method	String with Match	String without Match
Array some	someMethodMatch = true	someMethodNoMatch = false
Regular expression	regexMatch = true	regexNoMatch = null

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