javascript string contains
var string = "foo",
substring = "oo";
console.log(string.includes(substring));
javascript string contains
var string = "foo",
substring = "oo";
console.log(string.includes(substring));
javascript contains substring
var str = "We got a poop cleanup on isle 4.";
if(str.indexOf("poop") !== -1){
alert("Not again");
}
//use indexOf (it returns position of substring or -1 if not found)
check if value is a string javascript
let eventValue = event.target.value;
if (/^\d+$/.test(eventValue)) {
eventValue = parseInt(eventValue, 10);
}
//If value is a string, it converts to integer.
//Otherwise it remains integer.
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