javascript check for string code example
Example 1: is string javascript
function isString(value) {
return typeof value === 'string' || value instanceof String;
}
isString('');
isString(1);
isString({});
isString([]);
isString(new String('teste'))
Example 2: if string javascript
if (typeof myVar === 'string') { };
Example 3: javascript string contains function
s = "Hello world";
console.log(s.includes("world"));
Example 4: js check if variable is string
if (typeof myVar === 'integer'){
}
if (typeof myVar === 'boolean'){
}
Example 5: string.contains javascript
var str = "We got a poop cleanup on isle 4.";
if(str.indexOf("poop") !== -1){
alert("Not again");
}