JavaScript String Type

Search

We can search for a pattern within a string by using the indexOf method. This method returns the starting index of pattern within the string. If the pattern is not found -1 is returned.

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const chaos = `
  Chaos needs no allies,
  for it dwells like a poison in every one of us.
`
const poisonStartingIndex = chaos.indexOf("poison")
const greedStartingIndex = chaos.indexOf("greed")
console.log(poisonStartingIndex) // 49
console.log(greedStartingIndex)  // -1