Javascript: Check for an array of keywords match in a string

Question

What I am trying to accomplish (Pseudocode):

if caption.includes("dog" or "fish" or "bird" or "cat") { 
  // notify me 
}

caption is a dynamic variable. I'm able to get it to work using one keyword but I'm trying to have it check against a list of words. Doesn't need to be with includes(), whatever works.

Thank you for your time!

Possible duplicate of Check if an array contains any element of another array in JavaScript — VLAZ
– VLAZ, Commented Feb 27, 2019 at 7:43
Actually, probably more on topic here is one for string, although you can do the same as arrays using arr.some(item => str.includes(item)) — VLAZ
– VLAZ, Commented Feb 27, 2019 at 7:45

adiga · Accepted Answer · 2019-02-27 08:17:57Z

3

You can create an array of keywords and use some to check if at least one of them exists in the string like this:

const caption = "I love dogs";
const animals = ["dog", "fish", "bird", "cat"];
const exists = animals.some(animal => caption.includes(animal))

if (exists) {
  console.log("Yes");
  // notify 
}

Or you can use a regex like this:

const animals = ["dog", "fish", "bird", "cat"];
const regex = new RegExp(animals.join("|")) // animals seperated by a pipe "|"

if (regex.test("I love cats")) {
  console.log("Yes");
}

// if you don't want to create an array then:
if (/dog|fish|bird|cat/.test("I love elephants")) {
  console.log("Yes");
} else {
  console.log("No")
}

edited Feb 27, 2019 at 8:17

answered Feb 27, 2019 at 7:34

adiga

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arizafar · Accepted Answer · 2019-02-27 08:01:27Z

1

Don't need to create an extra array, use https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/search

let caption = 'cat'
if(caption.search(/dog|fish|cat|bird/) !== -1) {
	console.log('found')
}

answered Feb 27, 2019 at 8:01

arizafar

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