ar circle = {
radius: 10,
circumference(){
var Circum = 2 * Math.PI * this.radius;
return Circum.toFixed(2); // For Precision to 2 decimal point
},
area(){
var Area = Math.PI * (this.radius ** 2);
return Area.toFixed(2); // For Precision to 2 decimal point
}
};
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;
}
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