javascript string contains
var string = "foo", substring = "oo"; console.log(string.includes(substring));
string.contains javascript
var str = "We got a poop cleanup on isle 4."; if(str.indexOf("poop") !== -1){ alert("Not again"); }
javascript validate that input contains certain string
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <body> <input type="text" id='input'> <button type="button" onclick='btn()'>Alert</button> <script> function btn(){ var input=document.getElementById('input').value; var subs=[ 'name','what','child','all','candy' ]; for (let i = 0; i <subs.length; i++) { if(input.includes(subs[i])){ alert("includes " + subs[i]); } else{ console.log('dosnt include '+ subs[i]); } } } </script> </body> </html>