To set the value of a input hidden field through JavaScript, we set the input’s value property.
For instance, we write
document.getElementById("checkyear").value = "1";
to select the input with getElementById.
Then we set its value property to the input value.
Sometimes, we want to save output to variable as an object with JavaScript Fetch API.
In this article, we’ll look at how to save output to variable as an object with JavaScript Fetch API.
To save output to variable as an object with JavaScript Fetch API, we call res.json.
For instance, we write
const foo = async () => {
const res = await fetch("https://jsonplaceholder.typicode.com/posts/1");
const obj = await res.json();
console.log(obj);
};
foo();
to call fetch to make a get request to https://jsonplaceholder.typicode.com/posts/1.
Then we get the promise with the response body with res.json.
And we get response body with await.
To save output to variable as an object with JavaScript Fetch API, we call res.json.
Sometimes, we want to validate if date is before date of current date with JavaScript.
In this article, we’ll look at how to validate if date is before date of current date with JavaScript.
To validate if date is before date of current date with JavaScript, we compare their timestamps.
For instance, we write
const isAfterToday = (date) => {
return new Date(date).valueOf() > new Date().valueOf();
};
to define the isAfterToday function.
In it, we compare the date date with today’s date by converting to timestamps with the valueOf method.
Then we compare if date is bigger than today’s date with >.
To validate if date is before date of current date with JavaScript, we compare their timestamps.
Sometimes, we want to set just the date, ignoring time with JavaScript Date.
In this article, we’ll look at how to set just the date, ignoring time with JavaScript Date.
To set just the date, ignoring time with JavaScript Date, we pass in a date string into the Date constructor.
For instance, we write
const newDate = new Date(oldDate.toDateString());
to get the oldDate‘s date as a string with toDateString.
Then we pass that into the Date constructor to create a new date object with the date.
To set just the date, ignoring time with JavaScript Date, we pass in a date string into the Date constructor.
Sometimes, we want to check whether a button is clicked by using JavaScript.
In this article, we’ll look at how to check whether a button is clicked by using JavaScript.
To check whether a button is clicked by using JavaScript, we add a click listener to the button.
For instance, we write
document.getElementById("button").onclick = () => {
console.log("button was clicked");
};
to select the button with getElementById.
Then we set its onclick property to a function that’s called when the button is clicked.
To check whether a button is clicked by using JavaScript, we add a click listener to the button.