JAVASCRIPT

how to set checkbox checked

<input type="checkbox" name="vehicle3" value="Boat" checked>

#If if helps you give it Thumbs up

javascript set checkbox checked based on value

//HTML
<input type="checkbox" id="Numbers">Short Numbers</input>
<button type="button" onClick="changeCheckbox()">Save</button>
//JAVASCRIPT
function changeCheckbox(){
  	if(value)
	document.getElementById("Numbers").checked = true;
}