javascript check if function exists
//check if sayHello() function exists
if (typeof sayHello === "function") {
// This function exists
}
javascript check if function exists
//check if sayHello() function exists
if (typeof sayHello === "function") {
// This function exists
}
javascript check if function exists
if (typeof sourceObj.someMethod === "function") {
// you are safe using the method
sourceObj.someMethod();
}
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