JavaScript - String includes() method example

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// ONLINE-RUNNER:browser;

const text = 'ABCDE';

console.log(text.includes('A')); // true
console.log(text.includes('X')); // false

console.log(text.includes('B'));    // true
console.log(text.includes('B', 2)); // false

console.log(text.includes('ABC')); // true
console.log(text.includes('XYZ')); // false

1. Documentation


String includes(searchString)

String includes(searchString, position)


searchString - a string to be searched for within the string,

position - the position within the string at which to begin searching for searchString (0 by default).

ResultThe method returns true if the searchString is found anywhere within the given string,  otherwise returns false.
DescriptionThis method lets you determine whether or not a string includes another string.

See also

  1. JavaScript - check if string includes a substring

  2. JavaScript - check if string includes a character


  1. String.prototype.includes() - JavaScript | MDN

Alternative titles

  1. JavaScript - String.includes() documentation with examples
  2. js - String includes() method documentation with examples
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JavaScript - String (documentation)

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