JS - функция
if(typeof test === "function") {
console.log('test is a function');
}else {
console.log('test is not a function');
}
TomatenTim
if(typeof test === "function") {
console.log('test is a function');
}else {
console.log('test is not a function');
}variableToCheck instanceof Function// There are various ways to test if a variable is of function type
// typeof check
if(typeof test === "function"){
// do something with function
test()
}
// instanceof check
if(test instanceof Function){
// do something with function
test()
}
// call check
if(test?.call !== "undefined"){
test.call({}, arg1, arg2);
}function isFunction(functionToCheck) {
return functionToCheck && {}.toString.call(functionToCheck) === '[object Function]';
}