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HTML

<h2>JavaScript Substring example:</h2>
<div id="myString1">This is some text and i want to find if the work apple is in this string or not!</div>
<br/>
<div id="myString2">This string does not contains that word!</div>
<br/>
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JavaScript

var val1 = document.getElementById("myString1").innerHTML.indexOf("apple");

var val2 = document.getElementById("myString2").innerHTML.indexOf("apple");

if(val1 > -1) {
  console.log("myString1 contains the word apple!");
} else {
  console.log("myString1 does not contains the word apple!")
}



if(val2 > -1) {
  console.log("myString2 contains the word apple!");
} else {
  console.log("myString2 does not contains the word apple!")
}