checkbox button checked true html code example

Example 1: how to make checkbox checked in html

<input type="checkbox" checked={props.completed} /> 

#for props completed is true/false , hence if completed is false then checkbox will not be clicked .
# if the checkbox is true it will be will be checked

Example 2: how to check if input is checked javascript

const cb = document.getElementById('accept');
console.log(cb.checked);