The reject function is like .filter but in reverse, so you can. You can use the filter function and reverse the callback with the Logical Operator NOT to reverse the outcome.
Array.prototype.reject = function(fn){return this.filter(x => !fn(x))}
btns = document.getElementsByClassName("saveBtn");
for (var i = 0; i < btns.length; i++) {
btns[i].addEventListener("click", function () {
//Add function here
});
}
var url = "http://scratch99.com/web-development/javascript/";
var urlParts = url.replace('http://','').replace('https://','').split(/[/?#]/);
var domain = urlParts[0];
const isRequired = () => { throw new Error('param is required'); };
const hello = (name = isRequired()) => { console.log(`hello ${name}`) };
// These will throw errors
hello();
hello(undefined);
// These will not
hello(null);
hello('David');
The idea here is that it uses default parameters, like how the b parameter here has a default if you don’t send it anything:
function multiply(a, b = 1) {
return a * b;
}
Comments