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JavaScript - search array for substring match
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In this article, we would like to show you how to search an array for substring match in JavaScript.
In this example, we use filter() and includes() methods to search for elements inside the array that contain 'id' substring.
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const array = ['a', 'b', 'id-1-value1', 'c', 'id-2-value2'];2
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const results = array.filter((element) => element.includes('id'));4
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console.log(results); // [ 'id-1-value1', 'id-2-value2' ]
In this section, as the argument of filter() we use RegExp test() method to match the elements that start with given pattern - in this case id.
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const array = ['a', 'b', 'id-1-value1', 'c', 'id-2-value2'];2
const pattern = /^id/;3
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const results = array.filter((element) => pattern.test(element)); // tests for "id-" in the beginning of the element5
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console.log(results); // [ 'id-1-value1', 'id-2-value2' ]Note:
^in regular expressions matches the beginning of a string.
