how to check if a character exists in a string javascript code example
Example 1: check for substring javascript
const string = "javascript";
const substring = "script";
console.log(string.includes(substring));
Example 2: javascript check if character exists in string
"FooBar".includes("oo");
"FooBar".includes("foo");
"FooBar".includes("oo", 2);
~"FooBar".indexOf("oo");
~"FooBar".indexOf("foo");
~"FooBar".indexOf("oo", 2);
!!~"FooBar".indexOf("oo");
!!~"FooBar".indexOf("foo");
!!~"FooBar".indexOf("oo", 2);
Example 3: js check if string contains character
"FooBar".includes("oo");
"FooBar".includes("foo");
"FooBar".includes("oo", 2);