So, I have a page where I can add foods to an order list and currently I am making the "remove from the list" function as well, but I am facing a problem. When I call setAttribute() on the right removeButton, I also want to remove the item from my array so that it won't send the removed food's name to the database. My problem is the following: In the call of setAttribute(), something is wrong with my array, because removeName doesn't get it as a parameter.
var lastid = 0;
var foods_added = [];
var locked = true;
function add_food() {
var food_name = document.getElementById('food_name').value;
$.ajax({
url: "ask-info.php",
type: "post",
data: { food_name : JSON.stringify(food_name) },
success: function(res) {
console.log(res);
if (res == "van") {
var entry = document.createElement('h4');
entry.appendChild(document.createTextNode(food_name));
entry.setAttribute('id','item'+lastid);
var removeButton = document.createElement('button');
removeButton.appendChild(document.createTextNode("Töröl"));
removeButton.setAttribute('onClick','removeName("'+'item'+lastid+', foods_added")');
entry.appendChild(removeButton);
lastid+=1;
list.appendChild(entry);
foods_added.push(food_name);
document.getElementById('food_name').value = "";
document.getElementById('press').disabled = true;
} else {
document.getElementById('press').disabled = true;
}
}
})
}
function removeName(itemid, foods_added){
var item = document.getElementById(itemid);
for (var i = 0; i<foods_added.length; i++) {
if (foods_added[i].id == itemid) {
foods_added.splice(foods_added[i].id, 1);
}
}
list.removeChild(item);
}
It looks like your problem is probably in this line:
removeButton.setAttribute('onClick','removeName("'+'item'+lastid+', foods_added")');
I'd recommend trying this instead:
removeButton.addEventListener('click', () => {
removeName(`item${lastid}`, foods_added);
});
Or if you don't have the ability to use es6:
removeButton.addEventListener('click', function() {
removeName('item' + lastid, foods_added);
});
Going into more detail about why your code isn't working, I imagine it's because the string you're passing in as the second parameter to setAttribute is evaled in a context outside of your calling function. foods_added doesn't exist in that context so it is undefined.
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